TS indicator FS indicator Cause Corrective action
1-second inter-
val
Internal Circuit Error at Safety Input Refer to Internal Circuit Error at
Safety Input ( page 12 - 77).
1-second inter-
val
Discrepancy Error at Safety Input Refer to Discrepancy Error at Safety
Input ( page 12 - 83).
1-second inter-
val
Overload Detected at Test Output Refer to Overload Detected at Test
Output ( page 12 - 84).
1-second inter-
val
Stuck-at-high Detected at Test Out-
put
Refer to Stuck-at-high Detected at
Test Output (
page 12 - 85).
1-second inter-
val
Internal Circuit Error at Test Output Refer to Internal Circuit Error at Test
Output ( page 12 - 78).
1-second inter-
val
Short Circuit Detected at Safety Out-
put
Refer to Short Circuit Detected at
Safety Output ( page
12 - 86).
1-second inter-
val
Stuck-at-high Detected at Safety
Output
Refer to Stuck-at-high Detected at
Safety Output ( page
12 - 87).
1-second inter-
val
Internal Circuit Error at Safety Out-
put
Refer to Internal Circuit Error at
Safety Output ( page
12 - 79).
2-second inter-
val
--- Initializing Status is normal. Wait until process-
ing is completed.
System Error Refer to System Error ( page
12 - 69).
1-second inter-
val
NX Bus I/O Communications Stop-
ped
Refer to NX Bus I/O Communica-
tions Stopped (
page 12 - 76).
1-second inter-
val
1-second inter-
val
NX Unit I/O Communications Error Refer to NX Unit I/O Communica-
tions Error ( page 12 - 73).
12 Troubleshooting
12 - 12
NX-series Safety Control Unit User's Manual (Z930)
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