WCS_DISPATCHER
WCS task dispatch — one task per request to the best-placed available machine, with round-robin aisle balancing.
When to use it
Use WCS_DISPATCHER when a queue of ready warehouse tasks has to be handed one at a time to whichever crane, shuttle or AGV is idle and in range, and the same task must never be given to two machines.
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 |
| REQ | BOOL |
| TASK_Q | UINT |
| HEAD_TASK | UINT |
| EQ_STATUS | UINT |
| EQ_COUNT | USINT |
| PRIORITY | USINT |
| MIN_PRIORITY | USINT |
| HOST_OK | BOOL |
| BALANCE | BOOL |
| NO_EQ_TMO | TIME |
| ACK | BOOL |
Outputs
| Port | Type |
|---|---|
| NEXT_EQ | UINT |
| NEXT_TASK | UINT |
| DISPATCHED | BOOL |
| DISPATCH_VALID | BOOL |
| DISPATCH_COUNT | UDINT |
| AVAIL_COUNT | USINT |
| ASSIGN_PENDING | BOOL |
| HOLDING | BOOL |
| ALM_NO_EQ | BOOL |
| ALM_NO_TASK | BOOL |
| ALM_HOST_DOWN | BOOL |
| ALM_CFG_ERR | BOOL |
Validation evidence
- Tests
- 10
- Simulated scans
- 93
- 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 WCS_DISPATCHER — free
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