RA_PF755_VFD
PowerFlex 755 DPI telegram driver — 32-bit Logic Command assembly, Logic Status decode and Parameter 520 reference clamping from a cited bit map.
When to use it
Use RA_PF755_VFD when an Allen-Bradley PowerFlex 755 is controlled over EtherNet/IP using the DPI Logic Command / Logic Status words and a 32-bit REAL speed reference, and the control word bit mapping should come from the manufacturer's published table rather than be re-derived on site.
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 | Unit |
|---|---|---|
| ENABLE | BOOL | — |
| RUN | BOOL | — |
| DIR | BOOL | — |
| SPD_REF | REAL | Hz or rpm per drive Par. 300 |
| MAX_FWD_SPEED | REAL | Hz or rpm per drive Par. 300 |
| COAST_STOP | BOOL | — |
| CUR_LIM_STOP | BOOL | — |
| FAULT_RST | BOOL | — |
| ACCEL_SEL | INT | — |
| DECEL_SEL | INT | — |
| REF_SEL | INT | — |
| STATUS_WORD | DWORD | — |
| SPD_FBK | REAL | Hz or rpm per drive Par. 300 |
| COMM_OK | BOOL | — |
| COMM_TMO | TIME | — |
| NOT_STOP_LEAD | TIME | — |
| START_TMO | TIME | — |
| ACK_WIDTH | TIME | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| CTRL_WORD | DWORD | — |
| SPD_REF_OUT | REAL | Hz or rpm per drive Par. 300 |
| SPD_ACT | REAL | Hz or rpm per drive Par. 300 |
| STOP_PATH | INT | — |
| READY | BOOL | — |
| ACTIVE | BOOL | — |
| RUNNING | BOOL | — |
| STOPPING | BOOL | — |
| AT_SPEED | BOOL | — |
| AT_ZERO_SPEED | BOOL | — |
| DIR_ACT_FWD | BOOL | — |
| AT_CUR_LIMIT | BOOL | — |
| DRV_FAULT | BOOL | — |
| DRV_ALARM | BOOL | — |
| ALM_MTR_OVERLOAD | BOOL | — |
| ALM_COMM | BOOL | — |
| ALM_START_FAIL | BOOL | — |
| ALM_REF_CLAMP | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
| ALM_SEL_RANGE | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
RA_PF755_VFD 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
- 17
- Simulated scans
- 252
- 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 RA_PF755_VFD — 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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