I/O Table Errors And Precautions - Omron CJ2 CPU - REV 10-2010 User Manual

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I/O Table Errors and Precautions

I/O Table Errors
I/O Setting Errors and Number Duplication Errors
I/O tables cannot be created in the following cases when the procedures to create, edit, or transfer
I/O tables (i.e., using user-set I/O allocations) have been performed.
Problem
Verification error I/O SET ERR
between con- (fatal error)
nected Units and
I/O tables
The same unit Duplication Error
number for Special (fatal error)
I/O Units or CPU
Bus Units has
been set twice.
In addition, I/O tables cannot be used when the Too Many I/O Points Flag (fatal error) (A401.11) is
ON or the I/O Bus Error Flag (fatal error) (A401.14).
CJ2 CPU Unit Software User's Manual
Error Description
The I/O Setting Error Flag (fatal error)
(A401.10) will turn ON if there is a ver-
ification error, that is, if the registered
I/O tables do not match the models
and positions of the Units actually
connected in the basic system (i.e.,
CPU Racks and Expansion Racks).
Operation will not be possible.
The RUN indicator on the front of the
CPU Unit will turn OFF, and the
ERR/ALARM indicator will flash red.
The Duplication Error Flag (A401.13)
will turn ON in any of the following
cases.
• The same unit number is set for
more than one CPU Bus Unit.
• The same unit number is set for
more than one Special I/O Unit
• The same word is allocated to more
than one Basic I/O Unit.
• The same rack number is set for
more than one Expansion Rack.
Operation will not be possible.
The RUN indicator on the front of the
CPU Unit will turn OFF, and the
ERR/ALARM indicator will flash red.
8 I/O Allocations and Unit Settings
Correction
• If the number of Units is not correct,
turn OFF the power supply and cor-
rectly connect the proper Units.
• If the number of Units is correct, confirm
the Unit discrepancy by comparing I/O
tables with the CX-Programmer, turn
OFF the power supply, and then correct
the Unit connections.
• If there is a mistake in the I/O tables,
recreate or edit them using the CX-Pro-
grammer to correct the mistake.
Check the unit numbers of the CPU Bus
Units or Special I/O Units, eliminate the
duplications, and turn the Rack's power
supply OFF and then ON again.
Check allocations to Units on the rack
number whose bit in ON in A409.00 to
A409.03. Correct the allocations so that
no words are allocated more than once,
including to Units on other Racks, and
turn the Rack's power supply OFF and
then ON again.
Check the first word setting for the Rack
indicated in A409.00 to A409.03 and
change the setting to a valid word address
below CIO 0900 with the CX-Programmer.
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