Omron CJ1W-AD041-V1, Operation Manual

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Handling Errors and Alarms Section 2-8
The unit number for the Analog Input Unit has not been set correctly.
Note A single CS1W-AD161 is allocated CIO Area and DM Area words for two Spe-
cial I/O Units. Be sure to set a unit number so that the CS1W-AD161 is not
allocated words in the CIO Area and DM Area that are already allocated to
other Special I/O Units. Unit numbers for CS1W-AD161 can be set from 0 to
94.
2-8-4 Restarting Special I/O Units
There are two ways to restart Special I/O Unit operation after having changed
DM contents or having cleared the cause of an error. The first way is to turn
the power to the PLC OFF and ON, and the second way is to turn ON the
Special I/O Unit Restart Bit.
Special I/O Unit Restart Bits
The conversion data becomes 0000 during restart.
If the error is not cleared even after turning the Special I/O Unit Restart Bit ON
and then OFF again, then replace the Unit.
Note The highest unit number that can be set for a CS1W-AD161 is unit number 94.
2-8-5 Troubleshooting
The following tables explain the probable causes of troubles that may occur,
and the countermeasures for dealing with them.
Conversion Data Does Not Change
Error Error contents Input status
Duplicate Unit Number
(See note.) The same unit number has been
assigned to more than one Unit
or the unit number was set to a
value other than 00 to 95. Conversion does not start and
data becomes 0000.
Special I/O Unit Setting Error The Special I/O Units registered
in the I/O table are different from
the ones actually mounted.
Bits Functions
A50200 Unit #0 Restart Bit Turning the Restart Bit for any
Unit ON and then OFF again
restarts that Unit.
A50201 Unit #1 Restart Bit
~ ~
A50215 Unit #15 Restart Bit
A50300 Unit #16 Restart Bit
~ ~
A50715 Unit #95 Restart Bit (See note.)
Probable cause Countermeasure Page
The input is not set for being used. Set the input to be used. 52
The peak value hold function is in
operation. Turn OFF the peak value hold func-
tion if it is not required. 58
The input device is not working, the
input wiring is wrong, or there is a
disconnection. Using a tester, check to see if the
input voltage or current is changing. ---
Use Unit’s alarm flags to check for a
disconnection. 70