Omron WIRED REMOTE I-O System Manual page 99

Error Codes and Monitoring
25103
90
To check for other errors, monitor 25100 and force-set the system. This
causes the next error word to be displayed.
To read the next error, reset the Error Check bit, then set it again. If Slave #1
connected to Master #1 has as error, the following display will appear.
This is an example program to stop PC operation if an error occurs in the
Remote Terminal allocated word 230. Operation can be restarted by first re-
moving the cause of the error, then setting and resetting the Error Check bit
until the contents of word 251 goes to 0000 and then clearing the error via
the Programming Console.
25506
Incremented one by the Error Check flag.
Indicates Master #1.
Indicates word setting of 31 (allocated word 231).
Indicates Slave number.
Indicates Master number.
MOV(21)
251
DM 0000
25100
ANDW(34)
#FFF0
DM 0000
DM 0000
CMP(20)
DM 0000
#3000
FALS(07)
01
END(01)
Section 7-2
Remote I/O Error flag turns
ON when there is an error.
The first step is thus to move
IR 251 to DM 0000.
The next error is read and
its word number displayed.
If there is not another error,
all 0s will be displayed.
Bits 0 to 3 are masked.
Data from DM 0000 is
compared with #3000.
If data matches, there is an
error in the Unit allocated
word 230 and the CPU Unit
stops.