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 | — |
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
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 and the datasheet.
Every block in the catalogue is free to download, in every format it ships, with no purchase and no card. Browsing needs no account at all; downloading needs a signed-in one, so the block lands in your library and re-downloads whenever you need it.
Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.