Omron CP1E Series User Manual page 141

Reference
Error flag
Error code (A400)
Error information
I/O Bus Error
An I/O bus error has occurred in data transfer between the CPU Units and Units connected to the I/O
bus.
Cycle the power supply. If operation is not restored when the power supply has been cycled, turn OFF
the power supply and check that connections are proper and that there is no damage.
An error occurred in data transfer between the
CPU Unit and an Expansion Unit or Expansion
I/O Unit.
(A value of 0A0A hex will be stored in A404.)
Reference
Error flag
Error code (A400)
Error information
Too Many I/O Points Error
The number of CP-series Expansion Units and Expansion I/O Units connected exceeds the restriction
for the number of Units or words for the system configuration.
Turn OFF the power supply and reconfigure the system within the restrictions.
The number of CP-series Expansion Units and Expansion
I/O Units exceeds the restriction.
(A value of 4000 hex will be stored in A407.)
Reference
Error flag
Error code (A400)
Error information
CP1E CPU Unit Hardware User's Manual(W479)
Memory Error Flag, A401.15
80F1
Memory Error Location, A403
Cause
I/O Bus Error Flag, A401.14
80CA
I/O Bus Error Details, A404
Cause
Too Many I/O Points Flag, A401.11
80E1
Too Many I/O Points Details, A407
Remedy
• Try cycling the power supply.
• If the problem persists, turn OFF the power supply and
check the Connecting Cables between the Units to see if
they are connected properly.
• Check the Unit connections to be sure they are ok (e.g., that
there is no damage).
• After correcting the problem, turn ON the power to the Units
again.
Connect a maximum of three Expansion Units or
Expansion I/O Units to a CPU Unit with 30 or 40 I/O
points.
6 Troubleshooting
Remedy
6-9
6