Omron NE1A-SCPU01 - 2006 Operation Manual page 241

Indicator/Display Status and Corrective Actions for Errors
Indicators/display
NS Seven-
segment
display
--- P4
Node
address of
error
--- P5
Node
address of
error
Note
206
Error history
I/O Name
Input PS Voltage
Low
All OFF
Output PS Voltage
Low
All OFF
(1) Not saved in Pre-Ver. 1.0 Controllers, but saved in Controllers with unit
version 1.0 or later.
(2) These functions are not supported by Pre-Ver. 1.0 Controllers. The error
information is saved in Controllers with unit version 1.0 or later.
Cause
Saved in
nonvola-
tile
memory
See note I/O power
1. (input) is not con-
nected
although a safety
input terminal or
test output termi-
nal is used.
See note I/O power (out-
1. put) is not con-
nected although
a safety output
terminal is used.
Section 10-3
Corrective actions
Check the following points:
• Make sure the power supply
voltage is set within the speci-
fied range.
• Make sure a cable or wire is
not disconnected.