Omron CP1H CPU Operation Manual page 623

Troubleshooting
Special I/O Unit Errors
Option Board Errors
Battery Error
Seven-segment display
Special I/O Unit
0.3.→0.0.→
error, unit num-
ber 0
0.3.→s.f.→ Special I/O Unit
error, unit num-
ber 95
0.3.→f.f.→ Special I/O Unit
error, unit num-
ber unknown
■ Reference Information
Error flag Special I/O Unit Error Flag, A402.06
Error code (A400) 0300 to 035F, 03FF
Error information Special I/O Unit Error Unit Number Flags, A418 to A423
Seven-segment display
Option Board error
0.0.→d.1.→
(option slot 1)
0.0.→d.2.→ Option Board error
(option slot 2)
■ Reference Information
Error flags Option Board Error Flag, A315.13
Other Non-fatal Error Flag, A402.00
Error code (A400) ---
Error information ---
Seven-segment
display
If the PLC Setup is set to detect battery errors, this error will occur
0.0.→f.7.→
when there is an error in the battery in the CPU Unit (i.e., the volt-
age is low or a battery is not mounted). Check the battery connec-
tions.
When using battery-free operation, disable connecting battery
errors in the PLC Setup.
■ Reference Information
Error flag Battery Error Flag, A402.04
Error code (A400) 00F7
Error information ---
Probable cause and possible remedy
A data exchange error has occurred between the
CPU Unit and one of the Special I/O Units.
Note Information on where the data exchange error
occurred (i.e., between the CPU Unit and what
Unit number) is stored in A418 to A423. Check
the Unit given in A418 to A423.
Refer to the manual for the relevant Unit and remove
the cause of the error. Then turn ON the Restart Bit
or cycle the power supply.
Replace the Unit if operation is not restored when the
Unit is restarted.
Probable cause and possible remedy
A315.13 will turn ON if the Option Board is
removed while the power is being supplied.
Turn OFF the power supply and then install the
Option Board again.
Probable cause and possible remedy
Section 11-2
589