WEB_TENSION_CTRL
Closed-loop web tension trim with roll-diameter gain scheduling, deadband and web-break supervision.
When to use it
Use WEB_TENSION_CTRL when a load cell or dancer measures web tension on an unwind, rewind or intermediate draw section, and a torque-controlled drive needs a closed-loop trim on top of its open-loop torque reference.
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 | — |
| TENSION_PV | REAL | N |
| SP | REAL | N |
| LINE_SPD | REAL | m/min |
| TEN_OK | BOOL | — |
| SCHED_EN | BOOL | — |
| DIAMETER | REAL | mm |
| DIA_OK | BOOL | — |
| REF_DIA | REAL | mm |
| KP | REAL | %/N |
| TI_S | REAL | s |
| DB_N | REAL | N |
| TRIM_MAX | REAL | % |
| MIN_SPD | REAL | m/min |
| DEV_N | REAL | N |
| DEV_TMO | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| TORQUE_TRIM | REAL | % |
| TENSION_ERR | REAL | N |
| VALID | BOOL | — |
| HOLDING | BOOL | — |
| ALM_TEN_FAULT | BOOL | — |
| ALM_TENSION_DEV | BOOL | — |
| ALM_SATURATED | BOOL | — |
| ALM_DIA_INVALID | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 330
- 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 WEB_TENSION_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.