EPLAN P8 — Project Structure Reference Guide
| How to organise the project tree | Structure identifiers | Page hierarchy | Naming conventions across machine building, process, power, panel building, and system integration industries |
This one focuses entirely on the project tree hierarchy like what you saw in the image. Here’s what’s covered in 35 sections:
Foundation:
- What the project tree actually is and why it matters for reports, filtering, and navigation
- The three axes (
= function, + location, & installation) - Structure depth recommendations (shallow vs deep)
- Page naming and 4 numbering strategies (flat, block-by-structure, panel-coded, hierarchical dot)
The sample project annotated — every line in the image explained: why K1 (PLC controller) is a top-level node, why HK1 (Paint workpiece) contains its own P&IDs and sub-functions, why GAA / GAB1 / GAB2 are separate power nodes
Industry structures (all with full tree diagrams):
- Machine building — single machine, multi-station transfer line, robotic cell
- Panel building — single panel, multi-panel project, MCC (with section-level nodes), MV switchgear
- Process & chemical plant — per-unit structure (
=U10 through =U60) with marshalling and DCS - Oil & gas — LER rooms, ESD/SIS cabinet, F&G system
- Water & wastewater, Power substation, BAS/BMS, PLC/SCADA/DCS
- Solar PV, Wind, Marine, Rail, Data centre, Food & pharma, Mining
- Multi-site and multi-unit replication patterns
Standards tables:
- Complete EPLAN page type → IEC 61355 document code mapping table
- Mandatory admin pages list with exact content description per page
Table of Contents
Fundamentals — What Is the Project Structure?
The project structure in EPLAN is the tree hierarchy visible in the Pages navigator. It organises every page into a logical, navigable structure using structure identifiers as folder nodes.
Why It Matters
1
2
3
4
5
| ✔ Determines how reports are filtered and grouped
✔ Controls how terminal diagrams, cable lists, and BOMs are sorted
✔ Defines the page numbering and cross-reference logic
✔ Makes the documentation navigable for engineers, clients, and maintenance
✔ Affects how EPLAN auto-generates interconnection and connection lists
|
The Three Axes of Structure
EPLAN allows structuring the page tree using any combination of:
1
2
3
4
| = Function (what system / subsystem)
+ Location (where physically)
& Installation (which installation / unit — less commonly used)
# Document type / higher-level grouping
|
In practice most projects use one or two axes:
1
2
3
4
5
| Common combinations:
=FUNCTION only → Machine builders (group by system)
+LOCATION only → Panel builders (group by panel)
=FUNCTION+LOCATION → Process and large projects (group by system then panel)
+LOCATION=FUNCTION → Alternative ordering (group by location then system)
|
Structure Identifier Types in EPLAN
How EPLAN Displays the Tree
Each node in the project tree is a unique combination of structure identifiers. EPLAN creates a folder automatically when a page is assigned those identifiers.
1
2
3
4
5
6
7
8
9
10
11
| Project root
└─ =CTRL Function node
└─ +CP1 Location node
├─ Page 1 (Cover)
├─ Page 2 (PLC schematic)
└─ Page 3 (I/O list)
└─ =PWR
└─ +MCC1
├─ Page 1 (Incomer)
├─ Page 2 (Feeder 1)
└─ Page 3 (Terminal diagram)
|
Structure Depth — Recommendations
1
2
3
4
5
6
7
8
9
10
| Shallow (1 level): Good for small single-panel projects
+MCC1 → pages
Medium (2 levels): Good for most projects
=CTRL+CP1 → pages
=PWR+MCC1 → pages
Deep (3 levels): Good for large multi-site projects
=UNIT_30+AREA_A.MCC1 → pages
=CTRL+PLANT.CTRL_RM.CAB1 → pages
|
Page Naming & Numbering Conventions
Page Number Strategies
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
| Strategy 1 — Sequential flat numbers (simple projects)
1, 2, 3, 4 ... 100, 101, 102
Strategy 2 — Structure-coded numbers (recommended)
Each structure node gets a number block:
AAA pages → 0001 - 0099 (admin / cover)
=CTRL → 1000 - 1099
=PWR → 2000 - 2099
=DRIVE → 3000 - 3099
=SAFE → 4000 - 4099
Strategy 3 — Hierarchical dot notation
1.1, 1.2, 1.3 (section 1)
2.1, 2.2, 2.3 (section 2)
3.1.1, 3.1.2 (sub-section)
Strategy 4 — Structure prefix + number
CTRL-001, CTRL-002
PWR-001, PWR-002
MCC1-001, MCC1-002
|
Page Description Conventions
1
2
3
4
5
6
7
8
| Format: [Panel/System Tag] [Circuit description]
Examples:
MCC1 — Incomer and bus section
MCC1 / M01 — DOL starter pump P-101
CP1 — PLC CPU and power supply
CP1 — Digital inputs 1-32
DB1 — Lighting circuits L1-L12
TX1 — Transformer protection
|
The Sample Project Explained (from image)
The image shows EPLAN_Sample_Project_Education — a training/demonstration project showing best-practice structure for an automated manufacturing/paint workstation system.
Annotated Tree from Image
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
| EPLAN_Sample_Project_Education ← Project root
│
├── AAA1 Title page / cover sheet ← EAA — Admin, cover sheet
├── AAB1 Table of contents ← EAB — Lists regarding documents
├── ADB1 Structure description ← EAC — Explanatory documents
├── EFA2 Overview "PROFINET" ← EFA — Functional overview (network topology)
├── EMA3 Connection list ← EMA — Connection documents
│
├── A1 Enclosure 1 ← Location A1 — first cabinet
├── A2 Enclosure 2 ← Location A2 — second cabinet
│
├── B1 Station "Feed" ← Functional area / station B1
├── B2 Station "Work" ← Functional area / station B2
├── B3 Station "Provide" ← Functional area / station B3
│
├── C2 Control panel ← Location C2 — control panel
│
├── B4 Field ← Location B4 — field devices (no enclosure)
│
├── GAA 400V power supply ← Power supply section (=PWR / +MSB)
├── GAB1 24V device power supply ← 24VDC device supply
├── GAB2 24V supply PLC signals ← 24VDC PLC signal supply
│
├── EA Lighting ← Lighting circuits (=LIGHT)
│
├── F Emergency-stop control ← Safety / E-stop system (=SAFE.ESTOP)
│
├── K1 PLC controller ← (selected) ← PLC system (=CTRL.PLC)
│
├── S1 Machine operation enclosure ← Operator enclosure (=CTRL.HMI / +OP_ENCL)
├── S2 Machine operation control panel ← Operator control panel (=CTRL / +OP_PANEL)
│
├── GL1 Feed workpiece: Transport ← Process function — feed transport
│
├── TM1 Work workpiece: Grind ← Process function — grinding station
│ ├── A1 Enclosure 1 ← Sub-location inside TM1
│ └── A2 Enclosure 2 ← Sub-location inside TM1
│
├── HK1 Paint workpiece ← Process function — paint station
│ ├── PFB P&I diagrams ← EFB — Flow diagrams / P&ID
│ ├── EDB Explanatory documents ← EDB — Explanatory docs for paint station
│ ├── HW1 Prepare basic color red ← Sub-function — colour preparation
│ └── HW2 Mix paint color red ← Sub-function — paint mixing
|
Key Observations from Sample
1
2
3
4
5
6
7
8
9
10
11
| 1. Admin pages come first (AAA, AAB, ADB) — always
2. System overview pages come after admin (EFA, EMA)
3. Physical enclosures (A1, A2, C2) are used as structure nodes
4. Functional stations (B1, B2, B3) represent machine work areas
5. Power supplies (GAA, GAB) are separated from control
6. Safety system (F) is a separate top-level node
7. PLC (K1) is its own top-level node
8. Operator interfaces (S1, S2) are separate from PLC
9. Process functions (GL1, TM1, HK1) use descriptive names
10. Sub-stations (TM1) have their own enclosure sub-nodes (A1, A2)
11. The paint workstation (HK1) contains its own P&ID, docs, and sub-functions
|
Machine Building — Project Structure
Convention: Admin first → overview → power → control → safety → per-station / per-axis → operator → field → reports
Single Machine (simple)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
| PROJECT_NAME
│
├── 0_ADMIN
│ ├── 0001 Cover sheet / title page
│ ├── 0002 Table of contents
│ ├── 0003 Revision history
│ ├── 0004 Symbol legend / abbreviations
│ └── 0005 Structure description
│
├── =PWR / +CP1 Power distribution
│ ├── PWR-001 Mains incoming, isolation, transformer
│ ├── PWR-002 24VDC power supplies (SMPS, UPS buffer)
│ ├── PWR-003 24VDC distribution (fused terminal blocks)
│ └── PWR-004 Panel lighting and heating circuits
│
├── =CTRL / +CP1 PLC and control system
│ ├── CTRL-001 PLC CPU, power module, interface module
│ ├── CTRL-002 Digital inputs 1–16 (DI01)
│ ├── CTRL-003 Digital inputs 17–32 (DI02)
│ ├── CTRL-004 Digital outputs 1–16 (DO01)
│ ├── CTRL-005 Digital outputs 17–32 (DO02)
│ ├── CTRL-006 Analog inputs (AI01)
│ ├── CTRL-007 Analog outputs (AO01)
│ └── CTRL-008 Communications module (PROFINET, Modbus)
│
├── =SAFE / +CP1 Safety system
│ ├── SAFE-001 Safety relay wiring (E-stop, guards)
│ ├── SAFE-002 Light curtain / area scanner circuits
│ ├── SAFE-003 Safety I/O modules
│ └── SAFE-004 Safety circuit overview
│
├── =DRIVE / +CP1 Drive system
│ ├── DRIVE-001 X-axis VFD wiring
│ ├── DRIVE-002 Y-axis VFD wiring
│ ├── DRIVE-003 Z-axis VFD wiring
│ └── DRIVE-004 Spindle drive wiring
│
├── =MOTOR / +FIELD Motor and actuator circuits
│ ├── MOTOR-001 Motor M1 DOL starter
│ ├── MOTOR-002 Motor M2 star-delta starter
│ ├── MOTOR-003 Solenoid valves (pneumatic)
│ └── MOTOR-004 Servo actuators
│
├── =CTRL.HMI / +OP1 Operator station
│ ├── HMI-001 HMI panel wiring
│ ├── HMI-002 Door-mounted push buttons and lamps
│ └── HMI-003 Operator pendant
│
├── =FIELD / +FIELD Field devices (sensors, limit switches)
│ ├── FIELD-001 Position sensors — section A
│ ├── FIELD-002 Position sensors — section B
│ ├── FIELD-003 Temperature sensors
│ └── FIELD-004 Pressure / flow sensors
│
└── REPORTS
├── RPT-001 Terminal diagram
├── RPT-002 Cable list
├── RPT-003 Parts list / BOM
├── RPT-004 Device tag list
└── RPT-005 Connection list
|
Multi-Station Machine / Transfer Line
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
| PROJECT_NAME
│
├── 0_ADMIN Cover, TOC, revision, legend
├── OVERVIEW System architecture, PROFINET topology
│
├── =PWR Power distribution (main panel)
│ ├── +MSB Main switchboard
│ └── +MCC1 MCC
│
├── =CTRL Central PLC system
│ └── +CP_MAIN Main control cabinet
│
├── =SAFE Safety system
│ └── +CP_MAIN.SAFE Safety section
│
├── =STN_A Station A (loading)
│ ├── +STN_A.CP1 Station A control panel
│ ├── +STN_A.FIELD Station A field devices
│ └── +STN_A.OP1 Station A operator station
│
├── =STN_B Station B (processing)
│ ├── +STN_B.CP1 Station B control panel
│ ├── +STN_B.FIELD Station B field devices
│ └── +STN_B.OP1 Station B operator station
│
├── =STN_C Station C (unloading)
│ ├── +STN_C.CP1 Station C panel
│ └── +STN_C.FIELD Station C field
│
├── =CONV Conveyor system
│ ├── +CONV.CP1 Conveyor control panel
│ └── +CONV.FIELD Conveyor field devices
│
└── REPORTS
|
Robotic Cell
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
| PROJECT_NAME
│
├── 0_ADMIN
├── OVERVIEW Cell layout, safety zone diagram
│
├── =PWR / +CP_MAIN Power distribution
├── =CTRL / +CP_MAIN Cell PLC system
├── =SAFE / +CP_MAIN Safety system (perimeter, e-stop)
│
├── =ROB.R1 / +CP_R1 Robot 1 controller cabinet
│ ├── ROB1-001 Robot 1 power wiring
│ ├── ROB1-002 Robot 1 I/O interface
│ └── ROB1-003 Robot 1 fieldbus / PROFINET
│
├── =ROB.R2 / +CP_R2 Robot 2 controller cabinet
│
├── =VISION / +CP_MAIN.VISION Vision system
│ ├── VIS-001 Camera power and trigger wiring
│ └── VIS-002 Vision controller I/O
│
├── =GRIP / +FIELD End-of-arm tooling
│ ├── GRIP-001 Gripper solenoids
│ └── GRIP-002 Gripper sensors
│
├── =CONV / +FIELD Infeed / outfeed conveyors
│
└── REPORTS
|
Panel Building — Project Structure
Convention: Admin → overview → panel by panel → field (if any) → reports Focus: Each panel is its own top-level structure node
Single Panel (standalone)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
| PROJECT_NAME
│
├── ADMIN
│ ├── Cover sheet
│ ├── Table of contents
│ └── Symbol legend
│
├── +MCC1 Motor Control Centre 1
│ ├── MCC1-001 Single-line diagram
│ ├── MCC1-002 Incomer and bus section
│ ├── MCC1-003 Motor feeder M01 — DOL
│ ├── MCC1-004 Motor feeder M02 — DOL
│ ├── MCC1-005 Motor feeder M03 — Star-delta
│ ├── MCC1-006 Motor feeder M04 — VFD
│ ├── MCC1-007 Motor feeder M05 — VFD
│ ├── MCC1-008 Control power supply (24VDC)
│ ├── MCC1-009 Auxiliary relay circuits
│ ├── MCC1-010 PLC integration (if integrated)
│ └── MCC1-011 Panel lighting and heating
│
└── REPORTS
├── Terminal diagram — MCC1
├── Parts list — MCC1
└── Cable list
|
Multi-Panel Project (typical)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
| PROJECT_NAME
│
├── ADMIN
│ ├── Cover sheet
│ ├── Table of contents
│ ├── Revision list
│ ├── Symbol legend
│ └── Single-line diagram (SLD overview)
│
├── +MSB1 Main Switchboard 1
│ ├── MSB1-001 SLD — MSB1 single line
│ ├── MSB1-002 Incomer A (ACB, CT, metering)
│ ├── MSB1-003 Incomer B (ACB, CT, metering)
│ ├── MSB1-004 Bus tie (ACB)
│ ├── MSB1-005 Feeder 1 — to MCC1
│ ├── MSB1-006 Feeder 2 — to MCC2
│ ├── MSB1-007 Feeder 3 — to DB1
│ ├── MSB1-008 Feeder 4 — to UPS
│ ├── MSB1-009 ATS / changeover circuits
│ ├── MSB1-010 Control power and metering
│ └── MSB1-011 Interlocking and indication
│
├── +MCC1 Motor Control Centre 1
│ ├── MCC1-001 SLD — MCC1
│ ├── MCC1-002 Incomer
│ ├── MCC1-003 M01 — Pump P-101 (DOL)
│ ├── MCC1-004 M02 — Pump P-102 (DOL)
│ ├── MCC1-005 M03 — Fan F-101 (VFD)
│ ├── MCC1-006 M04 — Agitator AG-101 (Soft starter)
│ ├── MCC1-007 M05 — Conveyor CV-101 (DOL reversing)
│ ├── MCC1-008 Control power 24VDC
│ └── MCC1-009 Auxiliary relay wiring
│
├── +MCC2 Motor Control Centre 2
│ ├── MCC2-001 SLD — MCC2
│ ├── MCC2-002 Incomer
│ ├── MCC2-003..n Individual motor feeders
│ └── MCC2-xxx Control and interlocking
│
├── +DB1 Distribution Board 1
│ ├── DB1-001 Incomer
│ ├── DB1-002 Lighting circuits
│ ├── DB1-003 Power outlet circuits
│ ├── DB1-004 HVAC circuits
│ └── DB1-005 Sub-metering
│
├── +UPS1 UPS System
│ ├── UPS1-001 UPS input / output wiring
│ ├── UPS1-002 Battery cabinet connections
│ └── UPS1-003 UPS distribution board
│
├── +CP1 Control Panel 1
│ ├── CP1-001 PLC power supply
│ ├── CP1-002 PLC CPU and I/O
│ ├── CP1-003 24VDC distribution
│ ├── CP1-004 Relay wiring
│ └── CP1-005 Terminal connections
│
└── REPORTS
├── Terminal diagrams (per panel)
├── Cable list
├── Parts list (per panel and summary)
└── Device tag list
|
MCC / Switchgear Project Structure
Large MCC (multi-section, many feeders)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
| PROJECT_NAME_MCC
│
├── ADMIN
│ ├── Cover / title
│ ├── Table of contents
│ ├── Revision list
│ ├── Applicable standards (IEC 61439, etc.)
│ ├── General arrangement drawing
│ └── SLD overview
│
├── +MCC1.INC Incoming section
│ ├── 001 Incomer ACB / MCCB
│ ├── 002 Current transformers
│ ├── 003 Power quality analyser
│ └── 004 Control power and metering
│
├── +MCC1.BUS Busbar section
│ └── 001 Busbar arrangement
│
├── +MCC1.SEC_1 Section 1 — motors 1–4
│ ├── S1-001 M01 DOL starter — Pump P-101
│ ├── S1-002 M02 DOL starter — Pump P-102
│ ├── S1-003 M03 Star-delta — Compressor C-101
│ └── S1-004 M04 VFD — Fan F-101
│
├── +MCC1.SEC_2 Section 2 — motors 5–8
│ ├── S2-001 M05 DOL starter
│ ├── S2-002 M06 DOL starter
│ ├── S2-003 M07 VFD
│ └── S2-004 M08 Soft starter
│
├── +MCC1.SEC_3 Section 3 — motors 9–12
│
├── +MCC1.CTRL_SEC Control section (PLC / MCC intelligence)
│ ├── C-001 PLC CPU and power
│ ├── C-002 Digital I/O modules
│ ├── C-003 Analog I/O modules
│ ├── C-004 Communications (PROFINET/Modbus)
│ ├── C-005 24VDC distribution
│ ├── C-006 Auxiliary relay circuits
│ └── C-007 HMI connection
│
└── REPORTS
├── Terminal diagram — per section
├── Cable list
├── Parts list — per section and summary
└── Motor feeder schedule
|
MV Switchgear Project
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
| MV_SWITCHGEAR_PROJECT
│
├── ADMIN
│ ├── Cover
│ ├── Table of contents
│ ├── Standards reference (IEC 62271-200)
│ └── Single-line diagram
│
├── +MV_SW1.INC_1 Incomer panel 1
│ ├── 001 VCB and CT/VT wiring
│ ├── 002 Protection relay wiring (REF615 / SEL-751)
│ ├── 003 Trip/close coil circuits
│ └── 004 Local control and indication
│
├── +MV_SW1.INC_2 Incomer panel 2
│
├── +MV_SW1.BUS_SEC Bus section panel
│ ├── 001 Bus tie VCB
│ └── 002 Bus section protection
│
├── +MV_SW1.FDR_1 Feeder panel 1
│ ├── 001 VCB wiring
│ ├── 002 Protection relay
│ └── 003 Control and indication
│
├── +MV_SW1.FDR_2 Feeder panel 2
├── +MV_SW1.FDR_3 Feeder panel 3
├── +MV_SW1.TX_FDR1 Transformer feeder 1
├── +MV_SW1.MTR_FDR1 MV motor feeder 1
│
├── +MV_SW1.METER Metering panel
│ ├── 001 VT and metering wiring
│ └── 002 Energy meter and PQ analyser
│
└── REPORTS
├── Terminal diagrams
├── Cable list (DC auxiliary cables)
└── Protection relay setting schedule
|
Process & Chemical Plant
Convention: Admin → P&IDs → per functional area → utilities → control room → reports Structure: =UNIT_XX as primary nodes, +AREA as secondary
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
| PROCESS_PLANT_PROJECT
│
├── ADMIN
│ ├── Cover sheet
│ ├── Table of contents
│ ├── Revision history
│ ├── Project basis of design
│ ├── Symbol legend / abbreviations
│ ├── Applicable standards
│ └── Site layout plan
│
├── OVERVIEW
│ ├── OV-001 Electrical SLD (high level)
│ ├── OV-002 Control system architecture
│ ├── OV-003 Network topology (PROFINET / DCS)
│ └── OV-004 Safety system overview (SIL)
│
├── =U10 Raw material intake
│ ├── +U10.MCC1
│ │ ├── U10-MCC1-001 Incomer
│ │ ├── U10-MCC1-002 Conveyor M-1001 DOL
│ │ ├── U10-MCC1-003 Conveyor M-1002 DOL
│ │ └── U10-MCC1-004 Control 24VDC
│ ├── +U10.CP1
│ │ ├── U10-CP1-001 PLC I/O for area 10
│ │ └── U10-CP1-002 Field junction box wiring
│ └── +U10.FIELD
│ ├── U10-FIELD-001 Instruments FT-1001, PT-1001
│ └── U10-FIELD-002 Instruments LT-1001, TT-1001
│
├── =U20 Pre-treatment
│ ├── +U20.MCC1
│ ├── +U20.CP1
│ └── +U20.FIELD
│
├── =U30 Reaction
│ ├── +U30.MCC1 Reactor area MCC
│ │ ├── U30-MCC1-001 Incomer
│ │ ├── U30-MCC1-002 Agitator M-3001 (VFD)
│ │ ├── U30-MCC1-003 Circulation pump M-3002 (soft starter)
│ │ └── U30-MCC1-004 Cooling water pump M-3003 (DOL)
│ ├── +U30.PLC_CAB Remote PLC / DCS I/O
│ │ ├── U30-PLC-001 DCS field control station
│ │ ├── U30-PLC-002 AI modules (flow, pressure)
│ │ ├── U30-PLC-003 AO modules (control valves)
│ │ ├── U30-PLC-004 DI modules (switches)
│ │ └── U30-PLC-005 DO modules (on/off)
│ ├── +U30.JB_R01 Junction box at reactor R-301
│ │ └── JB-R01-001 Instruments at R-301
│ └── +U30.FIELD
│ ├── U30-FIELD-001 FT-3001, PT-3001, TT-3001
│ └── U30-FIELD-002 Control valves FCV-3001, PCV-3001
│
├── =U40 Separation
├── =U50 Purification
├── =U60 Product storage
│
├── =UTIL Utilities
│ ├── +UTIL.COMPRESS_RM Compressor room
│ ├── +UTIL.BOILER_RM Boiler room
│ ├── +UTIL.WATER Water treatment
│ └── +UTIL.SUBST Electrical substation
│
├── =CTRL_SYS Central control system
│ ├── +CTRL_RM.DCS_CAB1 DCS cabinet 1
│ │ ├── DCS-001 FCS A (primary controller)
│ │ ├── DCS-002 FCS B (redundant)
│ │ ├── DCS-003 AI modules — rack A
│ │ ├── DCS-004 AO modules
│ │ ├── DCS-005 DI modules
│ │ └── DCS-006 DO modules
│ ├── +CTRL_RM.DCS_CAB2 DCS cabinet 2 (expansion I/O)
│ ├── +CTRL_RM.HIST_CAB Historian server cabinet
│ └── +CTRL_RM.NET_CAB Network cabinet
│
├── =SIS Safety instrumented system
│ ├── +CTRL_RM.SIS_CAB1 SIS cabinet
│ │ ├── SIS-001 Logic solver A
│ │ ├── SIS-002 Logic solver B
│ │ ├── SIS-003 Safety I/O rack A
│ │ └── SIS-004 Safety I/O rack B
│ └── MARSH_SAFE Safety marshalling
│
└── REPORTS
├── Terminal diagrams (per cabinet / JB)
├── Cable list
├── I/O list
├── Instrument index
└── Parts list / BOM
|
Oil & Gas Project Structure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
| OIL_GAS_PROJECT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ ├── Applicable codes (IEC 60079, IEC 61511, API RP 14C)
│ ├── Area classification drawing
│ └── Electrical SLD
│
├── OVERVIEW
│ ├── Electrical power SLD
│ ├── ICSS architecture
│ ├── Network topology
│ ├── Safety system overview
│ └── Area classification summary
│
├── =WELLHEAD / +WELLHEAD Wellhead control panel
├── =SEP / +LER_A Separator area
│ ├── +LER_A.MCC1 Separator MCC
│ ├── +LER_A.PLC_CAB PLC cabinet
│ └── +LER_A.JB_S01 Junction box at separator S-101
│
├── =COMPRESS / +LER_B Compression area
│ ├── +LER_B.MCC2 Compressor MCC
│ ├── +LER_B.PLC_CAB Remote I/O cabinet
│ └── +LER_B.JB_K01 Junction box at compressor K-101
│
├── =EXPORT / +LER_C Export area
│
├── =UTIL / +UTIL_RM Utilities
│ ├── +UTIL_RM.GEN_RM Generator room
│ └── +UTIL_RM.UPS_RM UPS room
│
├── =ESD / +CTRL_RM.SIS_CAB ESD / Safety system
│ ├── ESD-001 Logic solver A (Triconex / HIMA)
│ ├── ESD-002 Logic solver B
│ ├── ESD-003 Logic solver C (TMR)
│ ├── ESD-004 Safety I/O rack
│ ├── ESD-005 ESD relay cabinet
│ └── ESD-006 Safety marshalling cabinet
│
├── =F_G / +CTRL_RM.F_G_CAB Fire and gas system
│ ├── FG-001 F&G controller
│ ├── FG-002 Fire detectors zone A
│ ├── FG-003 Fire detectors zone B
│ ├── FG-004 Gas detectors zone A
│ └── FG-005 Gas detectors zone B
│
├── =ICSS / +CTRL_RM Integrated control and safety system
│ ├── +CTRL_RM.DCS_CAB DCS cabinets
│ ├── +CTRL_RM.HIST_CAB Historian
│ └── +CTRL_RM.NET_CAB Network
│
└── REPORTS
|
Water & Wastewater Treatment
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
| WATER_TREATMENT_PLANT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ └── Site overview / layout
│
├── OVERVIEW
│ ├── Electrical SLD
│ ├── Process overview / PFD
│ └── SCADA architecture
│
├── =INTAKE / +INTAKE.CP1 Intake structure
│ ├── 001 Screen drive motor
│ ├── 002 Intake pump M-101 (VFD)
│ ├── 003 Intake pump M-102 (VFD)
│ └── 004 Level and flow instruments
│
├── =FLOC / +FLOC.CP1 Flocculation area
│ ├── 001 Mixer motors
│ └── 002 Dosing pump motors
│
├── =FILT / +FILT.CP1 Filter building
│ ├── 001 Filter 1 backwash pump
│ ├── 002 Filter 2 backwash pump
│ ├── 003 Air scour blowers
│ └── 004 Filter instruments
│
├── =DOSE / +DOSE.CP1 Chemical dosing building
│ ├── 001 Chlorine dosing pump
│ ├── 002 Lime dosing pump
│ └── 003 Fluoride dosing pump
│
├── =PUMP_STN / +PUMP_STN.MCC1 Pump station
│ ├── 001 Incomer
│ ├── 002 High-lift pump 1 (VFD)
│ ├── 003 High-lift pump 2 (VFD)
│ ├── 004 High-lift pump 3 (standby)
│ └── 005 Panel control 24VDC
│
├── =SUBST / +SUBST Electrical substation
│ ├── +SUBST.MV_SW MV switchgear
│ ├── +SUBST.TX1 Transformer 1
│ ├── +SUBST.MSB1 LV main switchboard
│ └── +SUBST.DB1 Sub-distribution board
│
├── =SCADA / +CTRL_BLDG.CR Control room / SCADA
│ ├── +CTRL_BLDG.CR.SCADA_CAB SCADA server cabinet
│ ├── +CTRL_BLDG.CR.PLC_CAB PLC cabinet (if combined)
│ └── +CTRL_BLDG.CR.DESK1 Operator desk
│
├── =RTU Remote pump stations (telemetry)
│ ├── +PS_01.CP1 Pump station 01 RTU panel
│ ├── +PS_02.CP1 Pump station 02 RTU panel
│ └── +PS_03.CP1 Pump station 03 RTU panel
│
└── REPORTS
|
Power Distribution & Substation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
| SUBSTATION_PROJECT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ ├── Standards (IEC 62271, IEC 61850)
│ └── Site layout
│
├── OVERVIEW
│ ├── HV SLD (132kV / 66kV)
│ ├── MV SLD (11kV / 6.6kV)
│ ├── LV SLD (415V)
│ ├── DC SLD (110VDC)
│ ├── Protection and metering overview
│ └── IEC 61850 network architecture
│
├── =HV / +SUBST.YARD HV yard / outdoor switchgear
│ ├── HV-001 Incomer gantry / surge arresters
│ ├── HV-002 Line 1 disconnector and earth switch
│ ├── HV-003 Line 2 disconnector and earth switch
│ └── HV-004 HV busbar connections
│
├── =MV / +SUBST.GIS_BLDG MV switchgear
│ ├── +MV_SW1.INC_1 Incomer panel 1 (from TX1)
│ ├── +MV_SW1.INC_2 Incomer panel 2 (from TX2)
│ ├── +MV_SW1.BUS_SEC Bus section
│ ├── +MV_SW1.FDR_1..n Feeder panels
│ └── +MV_SW1.METER Metering panel
│
├── =TX / +SUBST.TRANS_YARD Transformers
│ ├── +TX1 Transformer 1
│ │ ├── TX1-001 HV cable termination
│ │ ├── TX1-002 LV busbar / busduct connection
│ │ ├── TX1-003 Protection relay wiring
│ │ ├── TX1-004 OLTC control (if fitted)
│ │ └── TX1-005 Cooling and auxiliaries
│ └── +TX2 Transformer 2
│
├── =LV / +SUBST.CTRL_BLDG LV switchboard
│ ├── +MSB1.INC_A Incomer A (from TX1)
│ ├── +MSB1.INC_B Incomer B (from TX2)
│ ├── +MSB1.TIE Bus coupler
│ ├── +MSB1.FDR_1..n Feeder compartments
│ └── +MSB1.CTRL Control and interlocking
│
├── =PROT / +SUBST.CTRL_BLDG.RELAY_RM Protection and metering
│ ├── +PROT_PNL1.INC_A Incomer A protection panel
│ ├── +PROT_PNL1.INC_B Incomer B protection panel
│ ├── +PROT_PNL1.TX1_PROT TX1 differential protection
│ ├── +PROT_PNL1.TX2_PROT TX2 protection
│ ├── +PROT_PNL1.BUSBAR Busbar protection
│ ├── +PROT_PNL1.METER Energy and PQ metering
│ └── +PROT_PNL1.SCADA RTU / SCADA panel
│
├── =DC / +SUBST.CTRL_BLDG.BATT_RM DC battery and distribution
│ ├── +BATT_RM.BATT_BANK1 Battery bank 1
│ ├── +CHRG_CAB1 Charger cabinet
│ └── +DC_DB1 110VDC distribution board
│
├── =SCADA / +SUBST.CTRL_BLDG.RELAY_RM SCADA / IEC 61850
│ ├── RTU-001 RTU hardware and communications
│ ├── RTU-002 IED interface (IEC 61850 GOOSE)
│ └── RTU-003 GPS time server
│
└── REPORTS
├── Terminal diagrams
├── DC cable list
├── CT/VT schedule
└── Protection relay schedule
|
Building Automation (BAS/BMS)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
| BMS_PROJECT
│
├── ADMIN
├── OVERVIEW
│ ├── System architecture
│ └── Network topology
│
├── =BMS / +BLDG.PLANT_RM.BMS_CAB BMS system
│ ├── BMS-001 BMS server / supervisor
│ ├── BMS-002 System controller (DDC)
│ ├── BMS-003 Field controllers — level 1
│ ├── BMS-004 Field controllers — level 2
│ └── BMS-005 Communications network
│
├── =HVAC / +BLDG.PLANT_RM HVAC plant
│ ├── +AHU_1 AHU 1
│ │ ├── AHU1-001 Supply fan motor (VFD)
│ │ ├── AHU1-002 Return fan motor (VFD)
│ │ ├── AHU1-003 Heating / cooling coil valves
│ │ ├── AHU1-004 Damper actuators
│ │ └── AHU1-005 Sensors (T, RH, CO2, DP)
│ ├── +CHILLER_1 Chiller 1
│ ├── +BOILER_1 Boiler 1
│ └── +PUMP_SET Pump set
│
├── =HVAC / +BLDG.L1 Level 1 FCUs / VAV
│ ├── L1-001 FCU 1-01 wiring
│ ├── L1-002 FCU 1-02 wiring
│ └── L1-003 VAV zone controls
│
├── =HVAC / +BLDG.L2 Level 2 FCUs / VAV
├── =HVAC / +BLDG.ROOF Roof plant
│ ├── +CT1 Cooling tower 1
│ └── +ERV Energy recovery unit
│
├── =LIGHTING / +BLDG Lighting control
│ ├── +BLDG.DALI_CAB DALI controller cabinet
│ └── +BLDG.EMERG_CAB Emergency lighting panel
│
├── =PWR / +BLDG.ELEC_RM Electrical distribution
│ ├── +MSB Main switchboard
│ ├── +DB_L1 Level 1 DB
│ └── +DB_L2 Level 2 DB
│
└── REPORTS
|
PLC / SCADA / DCS Project Structure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
| AUTOMATION_PROJECT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ ├── I/O list / instrument index
│ ├── Network architecture
│ └── Software version record
│
├── OVERVIEW
│ ├── System architecture (Purdue model)
│ ├── Network topology diagram
│ ├── Power distribution overview
│ └── Safety architecture overview
│
├── =PWR / +CTRL_RM.UPS_CAB Control room power
│ ├── PWR-001 UPS system
│ ├── PWR-002 UPS distribution board
│ └── PWR-003 Rack power distribution
│
├── =CTRL.PLC / +CTRL_RM.CAB1 Main PLC cabinet
│ ├── PLC-001 Power supply and 24VDC distribution
│ ├── PLC-002 CPU and rack A
│ ├── PLC-003 CPU and rack B (redundant)
│ ├── PLC-004 Digital inputs — rack A
│ ├── PLC-005 Digital inputs — rack B
│ ├── PLC-006 Digital outputs — rack A
│ ├── PLC-007 Analog inputs — rack A
│ ├── PLC-008 Analog outputs
│ ├── PLC-009 RTD / thermocouple modules
│ ├── PLC-010 Communications — PROFINET
│ ├── PLC-011 Communications — Modbus / serial
│ └── PLC-012 Auxiliary relay wiring
│
├── =CTRL.IO / +FLD_CAB_A1 Remote I/O cabinet A1
│ ├── RIO-A1-001 Power supply
│ ├── RIO-A1-002 Interface module
│ ├── RIO-A1-003 DI modules
│ ├── RIO-A1-004 DO modules
│ ├── RIO-A1-005 AI modules
│ └── RIO-A1-006 Field terminals
│
├── =CTRL.IO / +FLD_CAB_A2 Remote I/O cabinet A2
├── =CTRL.IO / +FLD_CAB_B1 Remote I/O cabinet B1
│
├── =SIS / +CTRL_RM.SIS_CAB Safety system
│ ├── SIS-001 Safety PLC CPU A
│ ├── SIS-002 Safety PLC CPU B
│ ├── SIS-003 Safety I/O rack A
│ ├── SIS-004 Safety I/O rack B
│ ├── SIS-005 Safety power supply A/B
│ └── SIS-006 Safety terminals
│
├── =SCADA / +CTRL_RM.SCADA_CAB SCADA system
│ ├── SCADA-001 Primary SCADA server
│ ├── SCADA-002 Standby SCADA server
│ ├── SCADA-003 OPC server
│ ├── SCADA-004 UPS for SCADA cabinet
│ └── SCADA-005 PDU and power management
│
├── =HIST / +CTRL_RM.HIST_CAB Historian
│ ├── HIST-001 Primary historian server
│ └── HIST-002 Standby historian
│
├── =NETW.OT / +CTRL_RM.NET_CAB OT network
│ ├── NET-001 Core OT switch
│ ├── NET-002 Distribution switches
│ ├── NET-003 OT/IT firewall
│ ├── NET-004 NTP time server
│ └── NET-005 Fibre distribution panel
│
├── =CTRL.HMI / +CTRL_RM.DESK1 Operator stations
│ ├── HMI-001 Workstation 1 (primary)
│ ├── HMI-002 Workstation 2
│ └── HMI-003 Engineering workstation
│
├── =MARSH / +MARSH_CAB_A Marshalling cabinet A
│ ├── MARSH-A-001 DI marshalling terminals
│ ├── MARSH-A-002 DO marshalling terminals
│ ├── MARSH-A-003 AI marshalling terminals
│ ├── MARSH-A-004 HART barriers / isolators
│ └── MARSH-A-005 AO marshalling terminals
│
├── =INST / +FIELD Field instruments
│ ├── FIELD-001 Flow instruments (FT-xxx)
│ ├── FIELD-002 Pressure instruments (PT-xxx)
│ ├── FIELD-003 Temperature instruments (TT-xxx)
│ ├── FIELD-004 Level instruments (LT-xxx)
│ └── FIELD-005 Analytical instruments (AT-xxx)
│
└── REPORTS
├── I/O schedule
├── Terminal diagrams
├── Cable list
├── Instrument index
└── Network cable schedule
|
Renewable Energy — Solar PV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
| SOLAR_FARM_PROJECT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ └── Site layout
│
├── OVERVIEW
│ ├── Electrical SLD (string → combiner → inverter → grid)
│ ├── Protection coordination study
│ └── SCADA architecture
│
├── =PV / +SITE.FIELD_A PV array — Field A
│ ├── +SITE.FIELD_A.SCB1 String combiner 1
│ ├── +SITE.FIELD_A.SCB2 String combiner 2
│ └── +SITE.FIELD_A.SCB3 String combiner 3
│
├── =INV / +SITE.INV_STN_1 Inverter station 1
│ ├── INV1-001 Inverter 1 DC input and AC output
│ ├── INV1-002 Inverter 2 DC input and AC output
│ ├── INV1-003 LV/MV step-up transformer T1
│ └── INV1-004 Station auxiliary power
│
├── =INV / +SITE.INV_STN_2 Inverter station 2
│
├── =BESS / +SITE.BESS Battery energy storage
│ ├── BESS-001 Battery cabinets
│ ├── BESS-002 PCS cabinet
│ └── BESS-003 BMS and HVAC
│
├── =GRID / +SITE.MAIN_SUBST Grid connection substation
│ ├── +MV_SW MV switchgear
│ ├── +TX_EXPORT Export transformer
│ └── +PROT_PNL Protection panel
│
├── =SCADA / +SITE.CTRL_BLDG Site monitoring and SCADA
│ ├── SCADA-001 SCADA server
│ ├── SCADA-002 Communications gateway
│ ├── SCADA-003 Network cabinet
│ └── SCADA-004 Meteorological station
│
└── REPORTS
|
Renewable Energy — Wind
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
| WIND_FARM_PROJECT
│
├── ADMIN
├── OVERVIEW
│ ├── Site SLD
│ ├── Array cable schematic
│ └── SCADA architecture
│
├── =WTG / +WTG_01 Turbine 01
│ ├── WTG01-001 Tower base MV switchgear
│ ├── WTG01-002 Nacelle power converter
│ ├── WTG01-003 Nacelle control cabinet
│ ├── WTG01-004 Pitch system (hub)
│ ├── WTG01-005 Yaw system
│ └── WTG01-006 Condition monitoring
│
├── =WTG / +WTG_02 Turbine 02
├── =WTG / +WTG_03 Turbine 03
│ (repeat per turbine)
│
├── =SUBST / +ONSHORE_SS Onshore substation
│ ├── +ONSHORE_SS.HV_SW HV switchgear
│ ├── +ONSHORE_SS.TX Export transformer
│ └── +ONSHORE_SS.CTRL Control building
│
├── =SCADA / +SITE Wind farm SCADA
│ └── +SITE.CTRL_BLDG Control building
│
└── REPORTS
|
Marine & Shipbuilding
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
| VESSEL_PROJECT
│
├── ADMIN
│ ├── Cover (vessel name, IMO number, flag state)
│ ├── Applicable rules (IACS, classification society)
│ └── General arrangement
│
├── OVERVIEW
│ ├── Single-line diagram (main switchboard to loads)
│ ├── Power management system overview
│ └── Fire & safety overview
│
├── =ELECT / +VESSEL.D1.ER Engine room — main electrical
│ ├── +VESSEL.D1.ER.MAIN_SW Main switchboard
│ │ ├── MSB-001 DG1 incomer
│ │ ├── MSB-002 DG2 incomer
│ │ ├── MSB-003 Shore power incomer
│ │ ├── MSB-004 Bus coupler
│ │ ├── MSB-005 Thruster feeder
│ │ ├── MSB-006 Distribution feeders
│ │ └── MSB-007 Power management system (PMS)
│ ├── +VESSEL.D1.ER.EMERG_SW Emergency switchboard
│ └── +VESSEL.D1.ER.BATT_RM Battery room
│
├── =PROPUL / +VESSEL.D1 Propulsion
│ ├── +VESSEL.D1.ER Main engines
│ ├── +VESSEL.D2.PUMP_RM Pump room
│ └── Thruster systems
│
├── =BRIDGE / +VESSEL.BRIDGE Navigation and bridge
│ ├── BRIDGE-001 Helm / navigation console
│ ├── BRIDGE-002 DP system
│ ├── BRIDGE-003 Comms (GMDSS, AIS)
│ └── BRIDGE-004 Fire and safety console
│
├── =FIRE / +VESSEL Fire detection system
│ ├── +VESSEL.D1.ER ER fire detection
│ ├── +VESSEL.D3.ACCOM Accommodation detection
│ └── +VESSEL.BRIDGE Bridge fire panel
│
├── =CARGO / +VESSEL Cargo system
│
└── REPORTS
|
Rail & Transportation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
| METRO_LINE_PROJECT
│
├── ADMIN
├── OVERVIEW
│ ├── Line SLD
│ ├── Traction power overview
│ └── SCADA / TIMS architecture
│
├── =TRAC / +LINE_1 Traction power system
│ ├── +TRAC_SS_1 Traction substation 1
│ │ ├── TSS1-001 Rectifier
│ │ ├── TSS1-002 DC switchgear
│ │ └── TSS1-003 Control panel
│ └── +TRAC_SS_2 Traction substation 2
│
├── =SIGNAL / +LINE_1 Signalling system
│ ├── +LINE_1.STN_A.SIGNAL Station A signal equipment
│ └── +LINE_1.INTLK1 Interlocking room
│
├── =STN_A / +LINE_1.STN_A Station A
│ ├── +LINE_1.STN_A.SUBST Station substation
│ │ ├── STN_A-ELEC-001 MV switchgear
│ │ ├── STN_A-ELEC-002 LV distribution
│ │ └── STN_A-ELEC-003 UPS
│ ├── +LINE_1.STN_A.PLATFORM Platform
│ │ ├── STN_A-PLAT-001 PSD control panel
│ │ ├── STN_A-PLAT-002 Lighting
│ │ └── STN_A-PLAT-003 PA and CCTV
│ └── +LINE_1.STN_A.CTRL_RM Station control room
│ └── SCADA cabinet
│
├── =STN_B / +LINE_1.STN_B Station B
│
├── =TUNNEL / +LINE_1.TUNNEL_A Tunnel section A
│ ├── TUN-001 Ventilation fans
│ ├── TUN-002 Emergency lighting
│ └── TUN-003 Fire detection
│
└── REPORTS
|
Data Centre & IT Infrastructure
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
| DATA_CENTRE_PROJECT
│
├── ADMIN
│ ├── Cover (Tier rating, certification)
│ └── Standards (TIA-942, EN 50600)
│
├── OVERVIEW
│ ├── Power chain SLD (utility → ATS → UPS → PDU → rack)
│ ├── Cooling system overview
│ └── Network topology
│
├── =POWER / +DC.MDA Main distribution area
│ ├── +DC.MDA.GENSET_RM Generator room
│ │ ├── GEN-001 Generator 1
│ │ ├── GEN-002 Generator 2
│ │ └── GEN-003 ATS panels
│ ├── +DC.MDA.UPS_RM UPS room
│ │ ├── UPS-001 UPS system A
│ │ ├── UPS-002 UPS system B
│ │ └── UPS-003 UPS distribution boards
│ └── +DC.MDA.MSB Main switchboard
│
├── =COOL / +DC.COOL_PLANT Cooling plant
│ ├── COOL-001 Chiller 1 — motor and control
│ ├── COOL-002 Chiller 2 — motor and control
│ ├── COOL-003 Cooling tower fans
│ └── COOL-004 Pump motors
│
├── =POWER / +DC.HALL_A Data hall A
│ ├── +DC.HALL_A.HDA1 HDA — PDU area
│ │ ├── HALL_A-PDU-001 PDU A1
│ │ ├── HALL_A-PDU-002 PDU B1
│ │ └── HALL_A-PDU-003 PDU A2
│ └── +DC.HALL_A.CRAC1 CRAC units
│ └── CRAC-001 CRAC motor and controls
│
├── =NETW / +DC.NETWORK_RM Network room
│ ├── NET-001 Core switches
│ ├── NET-002 Distribution switches
│ ├── NET-003 Firewalls
│ ├── NET-004 Patch panels
│ └── NET-005 Fibre distribution
│
├── =DCIM / +DC DCIM system
│ ├── DCIM-001 Environmental monitoring
│ └── DCIM-002 Power monitoring
│
└── REPORTS
|
Food & Beverage / Pharmaceutical
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
| FOOD_BEVERAGE_PROJECT
│
├── ADMIN
│ ├── Cover, TOC, revision
│ └── Hygienic zone layout
│
├── OVERVIEW
│ ├── SLD
│ ├── Process flow diagram (PFD)
│ └── Control system architecture
│
├── =RECV / +SITE.RAW.CP1 Receiving (low care)
├── =PROC / +SITE.PROC.CP1 Processing area
│ ├── PROC-001 Prep and mixing motors
│ ├── PROC-002 Cooking system
│ ├── PROC-003 Cooling system
│ └── PROC-004 CIP system
│
├── =FILL / +SITE.HIGH_CARE.CP1 High care filling
│ ├── FILL-001 Filler motor and controls
│ ├── FILL-002 Sealing and labelling
│ └── FILL-003 Cleanroom instruments
│
├── =PACK / +SITE.PACK.CP1 Packaging
├── =REFRIG / +SITE.REFRIG.CP1 Refrigeration
│ ├── REFRIG-001 Compressor rack
│ ├── REFRIG-002 Evaporators
│ └── REFRIG-003 Cold store controls
│
├── =UTIL / +SITE.STEAM.CP1 Steam and utilities
├── =SUBST / +SITE.SUBST Electrical substation
│
├── =CTRL / +SITE.CTRL_RM Control room / MES
│ ├── +CTRL_RM.PLC_CAB PLC cabinets
│ ├── +CTRL_RM.SCADA_CAB SCADA server
│ └── +CTRL_RM.DESK1 Operator desk
│
└── REPORTS
├── Terminal diagrams
├── Instrument index
├── Motor schedule
└── I/O list
|
Mining & Heavy Industry
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
| MINING_PROJECT
│
├── ADMIN
├── OVERVIEW
│ ├── Site electrical SLD
│ └── Process overview
│
├── =CRUSH / +MINE_SITE.CRUSH Crushing plant
│ ├── +MINE_SITE.CRUSH.SUBST Crushing substation
│ ├── +MINE_SITE.CRUSH.MCC1 Crushing MCC
│ │ ├── CRUSH-MCC1-001 Incomer
│ │ ├── CRUSH-MCC1-002 Primary crusher motor (VFD)
│ │ ├── CRUSH-MCC1-003 Secondary crusher motor
│ │ ├── CRUSH-MCC1-004 Screen motors
│ │ └── CRUSH-MCC1-005 Conveyor motors
│ └── +MINE_SITE.CRUSH.CP_PRI Primary crusher control panel
│
├── =GRIND / +MINE_SITE.GRIND Grinding circuit
│ ├── +MINE_SITE.GRIND.SUBST Grinding substation
│ ├── +MINE_SITE.GRIND.MCC2 Grinding MCC (large drives)
│ └── +MINE_SITE.GRIND.CP1 Grinding control panel
│
├── =FLOAT / +MINE_SITE.FLOAT Flotation circuit
├── =THICKEN / +MINE_SITE.TAILING Tailings and thickening
│
├── =CONVEYOR / +MINE_SITE.CONVEY Conveyor system
│ ├── +MINE_SITE.CONVEY.TS1 Transfer station 1
│ └── +MINE_SITE.CONVEY.TS2 Transfer station 2
│
├── =POWER / +MINE_SITE.MAIN_SUBST Main substation
│ ├── +MINE_SITE.MAIN_SUBST.HV_SW HV switchgear
│ ├── +MINE_SITE.MAIN_SUBST.TX1 Main transformer
│ └── +MINE_SITE.MAIN_SUBST.MV_SW MV switchgear
│
├── =CTRL / +MINE_SITE.PROCESS_CTRL Process control
│ ├── +MINE_SITE.PROCESS_CTRL.DCS_CAB1 DCS cabinet 1
│ └── +MINE_SITE.PROCESS_CTRL.DCS_CAB2 DCS cabinet 2
│
└── REPORTS
|
Multi-Site / Multi-Unit Project Structure
For projects spanning multiple physical sites, or multiple identical production units
Multi-Site SCADA Project
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
| MULTI_SITE_PROJECT
│
├── ADMIN (project-level)
├── OVERVIEW (project-level SLD, network map)
│
├── =SCADA / +HEAD_END SCADA head end (master)
│ └── +HEAD_END.SCADA_CAB SCADA server cabinet
│
├── =SITE_A Site A (e.g. Treatment plant A)
│ ├── +SITE_A.SUBST Substation
│ ├── +SITE_A.MCC1 MCC 1
│ └── +SITE_A.RTU_PNL RTU panel
│
├── =SITE_B Site B
│ ├── +SITE_B.SUBST
│ ├── +SITE_B.MCC1
│ └── +SITE_B.RTU_PNL
│
└── =SITE_C Site C
|
Multi-Unit Identical Process (replication)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
| MULTI_UNIT_PROJECT
│
├── ADMIN
├── OVERVIEW
├── COMMON Common / shared equipment
│ ├── +COMMON.SUBST Main substation
│ ├── +COMMON.UTIL Utilities
│ └── +COMMON.CTRL_RM Central control room
│
├── =UNIT_1 Production unit 1
│ ├── +UNIT_1.MCC1
│ ├── +UNIT_1.CP1
│ └── +UNIT_1.FIELD
│
├── =UNIT_2 Production unit 2
│ ├── +UNIT_2.MCC1
│ ├── +UNIT_2.CP1
│ └── +UNIT_2.FIELD
│
└── =UNIT_3 Production unit 3
|
Standard Cover Pages & Admin Pages
Every project starts with these pages regardless of industry. Document type: EAA (Administrative), EAB (Lists), EAC (Explanatory)
Mandatory Admin Pages
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
| Page Type Content
001 EAA Cover sheet / title page
Contents: Project name, client name, project number,
revision, date, approvals, company logo,
applicable standards, voltage levels,
degree of protection (IP rating),
drawing set description
002 EAB Table of contents (auto-generated from EPLAN)
Contents: All page numbers, page descriptions,
structure identifiers, page types
003 EAA Revision history
Contents: Rev number, date, description, drawn by,
checked by, approved by
004 EAC Symbol legend / graphical symbols
Contents: All symbols used in the project with
description and standard reference (IEC 60617)
005 EAC Abbreviations list
Contents: All abbreviations used (MCC, VFD, PLC, etc.)
006 EAC Structure description
Contents: Explanation of all = and + identifiers used,
what each one represents
007 EAC General notes
Contents: Design basis, voltage levels, cable standards,
protection philosophy, earthing philosophy
008 EAA Applicable documents / standards list
Contents: IEC standards, client specs, codes of practice
|
Optional Admin Pages
1
2
3
4
5
6
7
8
9
10
| 009 EAA Project contacts list
010 EAA Drawing office notes (for internal use)
011 EAB Document register / transmittal list
012 EAC Area classification drawing (reference)
013 EAC Site layout plan (reference)
014 EFA Electrical SLD (high-level overview)
015 EFA Control system architecture overview
016 EFA Network topology diagram
017 EFA Safety system overview
018 EFB P&ID (or reference link to P&IDs)
|
Page Type to Document Type Mapping
When assigning IEC 61355 document types to EPLAN page types
| EPLAN Page Type | IEC 61355 Code | Description |
|---|
| Title page / cover sheet | EAA | Administrative documents |
| Table of contents | EAB | Lists regarding documents |
| Symbol overview / legend | EAC | Explanatory documents |
| Structure identifier overview | EAC | Explanatory documents |
| Revision overview | EBH | Documents regarding changes |
| Schematic multi-line | EFS | Circuitry documents |
| Schematic single-line | EFS | Circuitry documents |
| Overview (functional) | EFA | Functional overview documents |
| P&I diagram | EFB | Flow diagrams |
| Function descriptions | EFE | Function descriptions |
| PLC diagram | EFF | Function diagrams |
| Signal descriptions / I/O list | EFP | Signal descriptions |
| Setting value documents | EFQ | Setting value documents |
| Panel layout | ELU | In/on-equipment location documents |
| Terminal diagram | EMA | Connection documents |
| Terminal-connection diagram | EMA | Connection documents |
| Cable diagram | EMB | Cabling documents |
| Connection list | EMA | Connection documents |
| Cable overview | EMB | Cabling documents |
| Parts list | EPB | Parts lists |
| Summarised parts list | EPA | Material lists |
| Device tag list | EPB | Parts lists |
| Terminal-strip overview | EMA | Connection documents |
| PLC card overview | EFF | Function diagrams |
| PLC address overview | EFP | Signal descriptions |
| Manufacturer / supplier list | EPD | Product lists |
| Mounting list | ETL | Arrangement documents |
| Plot frame documentation | EAA | Administrative documents |
Numbering Strategies
Strategy 1 — Flat Sequential (small projects, <50 pages)
1
2
3
4
5
6
7
8
9
10
11
12
| 0001 Cover sheet
0002 Table of contents
0003 Symbol legend
0010 SLD overview
0020 MCC1 — incomer
0021 MCC1 — feeder M01
0022 MCC1 — feeder M02
0030 CP1 — PLC power
0031 CP1 — PLC CPU and I/O
0099 Terminal diagram
0100 Cable list
0101 Parts list
|
Strategy 2 — Block-by-Structure (recommended for medium projects)
1
2
3
4
5
6
7
8
| Admin block: 0001 - 0099
=PWR block: 1000 - 1099
=CTRL block: 2000 - 2099
=SAFE block: 3000 - 3099
=DRIVE block: 4000 - 4099
=MOTOR block: 5000 - 5099
=FIELD block: 6000 - 6099
Reports: 9000 - 9999
|
Strategy 3 — Panel-Coded (panel building standard)
1
2
3
4
5
6
7
8
9
| ADMIN: 0001 - 0099
MSB1: 1001 - 1099
MCC1: 2001 - 2099
MCC2: 3001 - 3099
DB1: 4001 - 4049
DB2: 4050 - 4099
CP1: 5001 - 5099
JB pages: 6001 - 6099
Reports: 9001 - 9099
|
Strategy 4 — Hierarchical Dot (large plant / DCS)
1
2
3
4
5
6
7
8
9
10
11
12
13
| 1 System overview
1.1 Electrical SLD
1.2 Control architecture
2 Unit 10 — Raw material intake
2.1 MCC1 incomer
2.2 M-1001 DOL starter
2.3 M-1002 DOL starter
3 Unit 20 — Pre-treatment
3.1 MCC2 incomer
...
9 Reports
9.1 Terminal diagrams
9.2 Cable list
|
Page Counter Reset Options
1
2
3
4
5
6
7
8
9
| Option A — Continuous: pages never reset, always unique
Pros: No ambiguity ever
Cons: Large gaps between sections
Option B — Reset per structure node
Each = or + block starts from 001
Pros: Neat numbers within each section
Cons: Same page number appears in different sections
Requires: Full identifier prefix to be unique (e.g. MCC1/001, MCC2/001)
|
Common Mistakes
| ❌ Wrong | ✅ Correct | Reason |
|---|
| No admin / cover pages | Always start with cover, TOC, legend | Client standard — missing these fails document review |
| All pages at project root (no structure) | Group into = or + nodes | Flat structure → all reports merged → unusable |
Inconsistent capitalisation: =ctrl, =CTRL, =Ctrl | Pick one — use =CTRL | Three different nodes in the tree |
Spaces in structure names: =MOTOR CTRL | =MOTOR_CTRL | Spaces break EPLAN identifiers |
One structure node for everything: =SYSTEM | Break into functional sub-nodes | Too broad → all reports merge into one |
Mixing = and + roles | Function goes in =, location goes in + | Mixing them breaks report filtering |
| Reports scattered through project | Group all reports in one block at end | Makes issuing, printing, and reviewing much cleaner |
| No page description on schematic pages | Always fill in the page description | Page description appears in TOC and on drawing title block |
| Starting page numbering at 1 without a gap | Start admin at 1, first section at 100 or 1000 | Leaves room to insert pages without renumbering |
| Different engineers using different structure names for same panel | Agree structure at project kick-off | +MCC1, +MCC_1, +MCC-1 are three different locations |
| Putting overview pages inside a structure node | Put overviews at project root or admin group | Overviews should be accessible without navigating into a subsystem |
| Single structure depth for large projects | Use two or three levels for large projects | =U30+AREA_A.MCC1 is navigable; =ALL is not |
Expert Tips
1. Plan the structure before creating page 1
Sketch the full tree on paper first. Define all = and + identifiers, agree the numbering strategy, and set up the structure in EPLAN project settings before any drawing starts. Restructuring mid-project is expensive.
2. Match the project structure to the client’s asset hierarchy
If the client uses SAP Plant Maintenance with locations like PLANT-AREA10-MCC1, your EPLAN + structure should match exactly: +PLANT.AREA10.MCC1. This makes commissioning, handover, and maintenance spares ordering seamless.
3. Admin pages always come first — no exceptions
Cover sheet, table of contents, revision history, symbol legend, and structure description are the first things a client engineer, auditor, or maintenance person looks for. Put them at the very top of the tree, unnested.
4. Keep report pages separate and at the end
Terminal diagrams, cable lists, BOMs, and device tag lists should live in their own block at the end of the project. Never mix report pages with schematic pages — it makes document control a nightmare.
5. Use descriptive page descriptions — not just page numbers
MCC1 — M03 Star-delta starter — Agitator AG-101 is infinitely better than Page 0043. The page description appears in the table of contents, the drawing title block, and in report headers.
6. Give field device pages their own +FIELD or +JB_XX location
Instruments, sensors, and actuators that are not inside an enclosure need a location. +FIELD or +JB_P01 keeps their connections out of the panel terminal diagrams and in the correct field wiring documents.
7. Sub-systems get sub-nodes — don’t flatten everything
A paint workstation (like HK1 in the sample) should have its own P&ID sub-pages, its own enclosure nodes, and its own sub-functions. EPLAN supports this naturally — use it. Navigating into HK1 → PFB → P&ID is much cleaner than hunting through 200 flat pages.
8. Use the same page structure for repeated units
If you have 6 identical motor starters, create one template structure and replicate it. MCC1.M01, MCC1.M02, … MCC1.M06 with identical internal page structure means changes to one propagate cleanly, and reports sort logically.
9. Overview and architecture pages belong at the top of each major section
Each major = function node should start with an overview or SLD page for that system. Engineers navigating to =PWR should immediately see the power SLD before diving into individual panel pages.
10. Document your structure in page EAC (Structure description)
Create a dedicated page in your admin section that lists every = and + identifier used, with a plain-English description of what each one means. This page is often the first thing a new engineer reads and saves hours of confusion on large projects.
Based on IEC 61355 | IEC 81346 | IEC 60617 | ISA-5.1 | TIA-942 | IEC 62271 | IEC 61439 Expert conventions compiled from machine building, panel building, process, power, automation, marine, rail, and data centre engineering
