SERVER_POWER_CTRL
Per-node server power sequencer: graceful shutdown with grace period, optional forced power-off, minimum off-dwell power cycling and a cycle audit count.
When to use it
Use SERVER_POWER_CTRL when individual compute nodes are powered on, shut down gracefully or power-cycled from the controls layer through a BMC bridge (Redfish, IPMI or a vendor equivalent), and every such action has to be sequenced, proved and counted.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type |
|---|---|
| ENABLE | BOOL |
| CMD_ON | BOOL |
| CMD_OFF | BOOL |
| CMD_CYCLE | BOOL |
| PWR_FB | BOOL |
| OS_UP | BOOL |
| PERMIT | BOOL |
| ALLOW_FORCE | BOOL |
| GRACE_TMO | TIME |
| ACT_TMO | TIME |
| OFF_DWELL | TIME |
| ACK | BOOL |
Outputs
| Port | Type | Unit |
|---|---|---|
| STATE | USINT | state |
| PWR_ON_CMD | BOOL | — |
| GRACE_REQ | BOOL | — |
| FORCE_OFF_CMD | BOOL | — |
| BUSY | BOOL | — |
| DONE | BOOL | — |
| FAIL | BOOL | — |
| NODE_ON | BOOL | — |
| OS_ALIVE | BOOL | — |
| CYCLES | UDINT | cycles |
| ALM_TMO | BOOL | — |
| ALM_GRACE_TMO | BOOL | — |
| ALM_REJECTED | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
SERVER_POWER_CTRL commands a real actuator. It is written to sit underneath your own interlock, permissive and protection logic — not to replace it. Commission it as you would any control block you wrote yourself.
Validation evidence
- Tests
- 15
- Simulated scans
- 188
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
- Conforms to IEC 61499
Download SERVER_POWER_CTRL — free
Create a free Ri Tech account to download the block. You get the Structured Text body, the Rockwell Add-On Instruction (.L5X), the Schneider Control Expert DFB (.XDB), PLCopen XML, the IEC 61499 function block type (.fbt) and the datasheet.
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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.