Multiple PLCs¶

For redundant or repeated PLCs, keep logic shared and make deployment multi-target.

Configuration¶

Configure PLC targets in pcs.config.json:

{
  "projectPath": "%USERPROFILE%\\Documents\\TIA-Projekte\\PCS\\PCS.ap20",
  "exportsRoot": "tia\\exports",
  "plcs": [
    "PLC_1",
    "PLC_2"
  ]
}

Deploy to all configured PLCs:

pcs deploy

Deploy to selected PLCs:

pcs deploy plcs=PLC_1
pcs deploy plcs=PLC_1,PLC_2 folder=06_ALARMS

See also: Terminal Commands (CLI) and TIA Deployment.

Shared Logic, Explicit Configuration¶

Keep FBs, FCs, shared DB structures, and UDTs identical across PLCs. Put PLC-specific differences into explicit configuration:

hardware configuration in TIA Portal,
per-PLC parameter DB initial values,
HMI/runtime configuration,
network partner names and addresses,
role/index values such as primary/secondary or redundancy member number.

If the code must diverge between PLCs, prefer a parameter or configuration DB before creating separate source trees.

Multi-PLC Diagram¶

Shared Source Deployment To Multiple PLCs

PlantUML source: multi-plc-deployment.puml