ABB_RED670_LDIF
Line current-differential element with a dual-slope restraint characteristic, charging-current allowance, an unrestrained stage and per-scan communications supervision.
When to use it
Use ABB_RED670_LDIF when a cable or overhead line is protected as a unit from both ends, a telecommunications channel carries the remote end's currents to this relay, and the scheme must be secure against the channel itself failing.
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 |
|---|---|---|
| IlocA | REAL | pu |
| IlocB | REAL | pu |
| IlocC | REAL | pu |
| IremA | REAL | pu |
| IremB | REAL | pu |
| IremC | REAL | pu |
| RX_OK | BOOL | — |
| CH_DELAY | REAL | ms |
| CH_DELAY_MAX | REAL | ms |
| CH_TMO | TIME | — |
| IMIN | REAL | pu |
| ICHG | REAL | pu |
| END1 | REAL | pu |
| SLOPE1 | REAL | 0-1 |
| END2 | REAL | pu |
| SLOPE2 | REAL | 0-1 |
| IINST | REAL | pu |
| BLK | BOOL | — |
| ENABLE | BOOL | — |
| CT_OK | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| TRIP | BOOL | — |
| Idiff | REAL | pu |
| chOK | BOOL | — |
| IREST | REAL | pu |
| START | BOOL | — |
| TRIP_UNRES | BOOL | — |
| FLT_PH | INT | — |
| BLOCKED | BOOL | — |
| VALID | BOOL | — |
| ALM_CH_FAIL | BOOL | — |
| ALM_MEAS_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
ABB_RED670_LDIF 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
- 9
- Simulated scans
- 56
- 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 ABB_RED670_LDIF — 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.