Unlatch OTU
Turns the tag off while the rung is true.
Global.HornOTU
| Tag | After two scans |
|---|---|
| Horn | 0 |
How it works
Sets its BOOL operand to 0 while the rung is true. A false rung leaves the operand unchanged.
How it's used
Use OTU to turn off a tag that an OTL turned on.
Global.HighLevelXIC
Global.AlarmOTL
Global.ResetPBXIC
Global.AlarmOTU
| Tag | Value |
|---|---|
| HighLevel | 0 |
| ResetPB | 1 |
| Alarm | 0 |
ResetPB turned Alarm off.
Operands
| Operand | Data type | Read or write |
|---|---|---|
| Tag | BOOL | Writes |
Common mistakes
- Using a different tag from the latchLatch and unlatch the same BOOL tag, and check which rung executes last.
Learn it in a lesson
- Latch and unlatch coilsBeginner · 20 min