Omron NE1A-SCPU01 - 2006 Operation Manual page 240

Indicator/Display Status and Corrective Actions for Errors
Indicators/display
NS Seven-
segment
display
--- P3
Node
address of
error
--- P3
Node
address of
error
--- P3
Node
address of
error
--- P3
Node
address of
error
--- P3
Node
address of
error
Error history
I/O Name
Target ter- Over Current
minal Detected at Safety
Output
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
Target ter- Short Circuit
Detected at Safety
minal
Output
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
Target ter- Stuck-at-high
minal Detected at Safety
Output
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
Target ter- Cross Connection
minal Detected at Safety
Output
lit red
Paired ter-
minal
(Dual Set-
ting)
flashing
red
Target ter- Dual Channel
minal Violation at Safety
(Dual Set- Output
ting)
lit red
Cause
Saved in
nonvola-
tile
memory
See note Overcurrent was
1. detected at
safety output.
See note Short circuit was
1. detected at
safety output.
See note Stuck-on-high at
1. safety output
See note Short circuit was
1. detected
between output
signal wires at
safety output
See note Output data
1. error at safety
output
Section 10-3
Corrective actions
Check the following points:
• Make sure there is no overcur-
rent 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 errors,
the following conditions are
required:
Latch input 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 program output
data (for two outputs) in the
Dual Channel Mode are config-
ured as equivalent channels.
205