Field equipment / Sensor
Battery temperature / voltage
PCS Status
Access control / fire protection
10:15:31.125
SM01 Temp = 31.2°C
SM01 Temp = 31.2°C
Communications & Interfaces
Give every command clear boundaries,
Every state has its source.
Every anomaly can be located.
For large power storage plants BESS, from equipment I/O, field bus, industrial network, edge control to EMS, SCADA and cloud platforms to define communications interfaces, data syntax, time sequence and liability boundaries, to establish a defined, traceable, verifiable system of communications engineering.
Chain
The whole chain is traceable. Data sources
Time
Time series for certainty Time to verify
Redundancy
Redundancy and tolerance Link to switch.
Evidence
Certification auditable There's evidence.
Side
End-to-end boundaries Who issues, who executes, who confirms
Time
Harmonization of time benchmarks Clear sequence of events
Italy
Unified Data Semantics It's different. It's the same.
Redundancy
Chain redundancy Auto-interput
Evidence
Complete evidence Log, data, version auditable
A clear end-to-end link From equipment to clouds, responsibility can be traced.
Field bus
CAN
RS485
Modbus RTU
10:15:31.132
CAN ID: 0x18FF9E5
CAN ID: 0x18FF9E5
Marginal Network
Industrial exchanges
Industrial gateway
VLAN / QoS
10:15:31.138
batt.temp.102
batt.temp.102
Side Control Layer
EMS / Edge
Rule enforcement
Status Mass
10:15:31.146
Quality: Good
Quality: Good
Supersystem
EMS
SCADA
KPI/ Report
10:15:31.158
TSCDM Publish
TSCDM Publish
Cloud/ Third Party Platform
Telemetry
API
Historical data
10:15:31.286
/site/telemetry
/site/telemetry
Command / Control
Data / Report
Feedback / Confirmation
Fault / alarm
Physical connection to I/ O boundary
Fibre LC
IEC 61850
RJ45 Ethernet
Modbus TCP
CAN DB9
BMS / PCS
RS485
Meter / Sensor
DI / DO
Fire / Interlock
24VDC
Aux Power
| Interface | Typical protocol | Purpose | Media / Rate | Segregation / protection | Typical distance |
|---|---|---|---|---|---|
| Fibre | IEC 61850 / MMS | Station-controlled high-speed interconnection | Single / Multiple & 1/10 Gbps | 2.5 kV / EMI isolation | 2–40km |
| Ethernet | Modbus TCP / MQTT | Controls and equipment communications | Cat6A · 100/1000M | 1.5kV / Surge | 100m |
| CAN | CAN 2.0B | Battery / PCS Device Link | 500kbps–1Mbps | TVS / Segregation | 40m |
| RS485 | Modbus RTU | Sensor / meter | 9.6–115.2kbps | TVS / Segregation | 1200m |
| DI / DO | Dry Point | Fire / access control / interlock | 24VDC | Optical separation. | Site Distance |
Layer Network and Area Division IEC 62443 References
Enterprise L4
Management / Data / Operations
Station Control L3
EMS / SCADA
Edge area L2
Edge / PLC
Equipment area L1
BMS / PCS
Field area L0
Sensor / Executor
Enterprise Network / Cloud
Firewall
Industry DMZ
BMS
PCS
meter
Thermal control
Fire
• VLAN / ACL access control • White List and Minimum Permissions • One-way flow and isolation strategies • Audit logs and strategy marks
Protocol translation does not change control / security semantic
Multi protocol input
CAN
Modbus RTU
Modbus TCP
IEC 61850 / MMS
MQTT / API
→
Parsed
Protocol Parser
Frame / Register
→
Italy
Semantic Map
Name / Unit / Quality
→
Mod
Unified data model
TSCDM
→
Harmonized application for publication
EMS / SCADA
History library / Data Lake
Third party API
Event System
Do not change control semantics | do not lose safety interlocks | do not blur quality bits | do not drop execute commands
Data dictionary and quality Unified Data Model TSCDM
| Organisation | In Chinese | Units | Type | Scope | Quality | Time source | Source equipment | Cloud Path |
|---|---|---|---|---|---|---|---|---|
| batt.voltage.avg | Average battery voltage | V | float | 0–1500 | Good | PTP | BMS | /site/batt/voltage/avg |
| batt.temp.102 | Core temperature T102 | °C | float | -40–125 | Good | PTP | BMU | /site/batt/temp/102 |
| pcs.power.active | PCS has power. | kW | float | -2500–2500 | Good | PTP | PCS | /site/pcs/power/active |
| fire.alarm.smoke01 | Smoke SM01 | bool | bool | 0 / 1 | Bad / Good | PTP | Fire | /site/fire/smoke/01 |
Command → Confirm → Execute → Status Feedback Shake hands.
1
Operator / Upper System Under Control Command
EMS Generation PCS. SetPower
ReqID: 7fa32c
P = 500 kW
P = 500 kW
2
Border Receiving and Verify
Check access, scope and equipment status.
Check: PASS
Target: PCS1
Target: PCS1
3
Send to Device / Executor
The Modbus TCP command is written.
Func: Write
Register: 45
Register: 45
4
Equipment execution and return confirmation
PCS accepts the control request.
Ack: Accepted
Latency: 10ms
Latency: 10ms
5
State of measurement reported
Real power and state returns.
P = 500.2 kW
Quality: Good
Quality: Good
6
Station-controlled closed loop verification and event marks
EMS Comparison of Targets and Actual Values.
Error: 0.04%
Result: OK
Result: OK
Command / Control
Data / Report
Confirm / Feedback
Warning / Abnormal
Time Sync with Event Order
- All stations use PTP / IEEE 1588v2 unified timing
- Key controller maintains a local high-precision clock
- Event timetamp is generated by the source device and is not completed in the upper layer
- All SOEs sorted in a unified time axis
10:25:11.123457 PTP Sync Clock locked
10:25:11.123809 Event SM01 Alarm · Seq 8891
10:25:11.124205 Event Rack Trip · Seq 8892
10:25:11.124780 Event PCS Block · Seq 8893
Redundancy and failure switch Ring / Double connection
Edge
SW-A1
SW-B1
SW-A2
SW-B2
Device
A locator of communication failure Observable, reproducible, and closed-loop capable
phenomena
10:32 PCS power feedback fluctuated.
Information / Evidence
Captures Modbus TCP statistical information with a switch.
Timeout ↑
Retransmission ↑
Retransmission ↑
Analysis
Retransmitting to single edge switch port.
CRC Error
Burst Loss
Burst Loss
Gene.
The light module chain is intermittently lost, resulting in a cycle time out.
CRC Mispackage Incidence
Rehabilitation
Change the light module and clear the fibre-optic side.
Link Stable
Verify closed loops
100M full-time work is stable and retransmitted.
PASS
Location time 3 minutes, 28 seconds.
Impact duration Four minutes and 13 seconds.
Scope of impact PCS1 Communications
Event Level P2 Medium
ICD and Version Management
- Standardize interface definition
- Version controlled and retroactive
- Change evaluation and compatibility certification
| ICD Number | Version | Status | Publication date |
|---|---|---|---|
| ICD-BMS-001 | v1.3.0 | Official | 2025-04-10 |
| ICD-PCS-001 | v1.2.0 | Official | 2025-04-10 |
| ICD-EMS-001 | v1.4.0 | Official | 2025-05-01 |
HIL Simulation
- Consistency of protocol / time-series pressure
- Broken chains, dropped bags, delayed and abnormal injections
- Edge Switch / Redundant Link Validation
Field-integrated evidence
- FAT / SAT / live coordination
- Data and alarm consistency validation
- Operation, command and event mark all the way
List of deliverables Core material
ICD
Interface Control File
Agreement, Table, Boundary and Version Definition
Points
Table and Data Dictionary
Name, unit, scope, mass level
Network
Network and security design
VLAN, ACL, DMZ AND THOSE
Check
Equipment linkage manual
Wiring, testing, diagnosis and recovery
Measure
Test plans and examples
FAT / HIL / SAT validation scene
Report
FAT/ SAT report
Results, evidence and records of unusual treatment
V
Transport and trouble location manual
Events, communications and diagnostic processes