Omron NE1A-SCPU01 - 2006 Operation Manual page 246

Error History
Message
NE1A-series Controller System Failures
Over Current Detected
at Safety Output
Short Circuit Detected at
Safety Output
Stuck-at-high Detected
at Safety Output
Cross Connection
Detected at Safety
Output
Dual Channel Violation
at Safety Output
Overcurrent was detected
at safety output.
Short circuit was detected
at safety output.
Stuck-at-high at safety
output
Short circuit was detected
between output signal
wires at safety output.
Output data error at safety
output
Corrective Actions
Check the following points:
• Make sure there is no overcurrent for the output.
• Make sure the output signal wire does not have an earth fault.
• Make sure the output signal wire is not contacting the power
source (positive side).
• Make sure there is not a short circuit between output signal wires.
To recover from these failures, the following conditions are
required:
Latch output error time must have passed, and the root cause must
have been removed.
The output signal from the user application for the target safety
output must turn OFF.
Check whether the data of the two outputs in the Dual Channel
Mode are configured as equivalent channels.
Section 10-4
211