A-1
Appendix A
ULC Programming Requirements
Common Earth
Fault Ground and
Common Trouble
Indicator
This application monitors a system pseudo that counts the number of ground faults or troubles
that occur on the system. Each time this counter increments (i.e. a ground fault or trouble
occurs), a yellow LED on the operator interface panel illuminates.
Step 1. Add a Custom Control equation to monitor all ground faults:
1. Click on the Custom Control Tab
2. Add a new Equation
3. Paste the following equation:
[INPUTS]
STATUS ON
A112 | ANALOG | COUNTER | GROUND TROUBLE COUNTER
OR STATUS ON
2-0-8 | CARDSTAT | CSP | IDNET+ EARTH TROUBLE
[END INPUTS]
[OUTPUTS]
TRACK ON PRI=9,9
P535 | DIGITAL | UTILITY |
[END OUTPUTS]
Note: P535 is shown as an example; use any digital point.
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