WMS_HOST_LINK
WMS host telegram link — sequenced, acknowledged exchange with idempotent retry, inbound de-duplication and link health.
When to use it
Use WMS_HOST_LINK when orders and confirmations are exchanged with a WMS/WCS host as discrete telegrams over OPC UA, a TCP telegram interface or a fieldbus, and neither side may lose a message or act on one twice.
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 |
| PARAMS | STRING |
| TELEGRAM | STRING |
| PROTOCOL | USINT |
| SEND | BOOL |
| TX_DONE | BOOL |
| ACK_RX | BOOL |
| NAK_RX | BOOL |
| ACK_SEQ | UINT |
| RX_NEW | BOOL |
| RX_SEQ | UINT |
| RX_RAW | STRING |
| REPLY_TMO | TIME |
| MAX_RETRY | USINT |
| HB_TMO | TIME |
| OP_ACK | BOOL |
Outputs
| Port | Type | Unit |
|---|---|---|
| SEQ | UINT | — |
| TX_TELEGRAM | STRING | — |
| TX_LEN | UINT | — |
| TX_REQ | BOOL | — |
| ATTEMPT | USINT | — |
| BUSY | BOOL | — |
| FAILED | BOOL | — |
| EXCH_ACKED | BOOL | — |
| LINK_OK | BOOL | — |
| RX_TELEGRAM | STRING | — |
| RX_VALID | BOOL | — |
| RX_COUNT | UINT | — |
| OK_COUNT | UDINT | — |
| LINK_QUIET_S | REAL | s |
| ALM_BUSY | BOOL | — |
| ALM_NOT_READY | BOOL | — |
| ALM_NAK | BOOL | — |
| ALM_TIMEOUT | BOOL | — |
| ALM_SEQ_ERR | BOOL | — |
| ALM_RX_DUP | BOOL | — |
| ALM_LINK_DOWN | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Validation evidence
- Tests
- 11
- Simulated scans
- 230
- 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 WMS_HOST_LINK — 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.
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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.