Omron CS1W-MC221 - 02-2008 Operation Manual page 611

PLC Interface Area Lists
CS1W-MC421 PLC Interface Area Inputs (MC Unit to CPU Unit)
Word Contents Bit
n+19 System 00 to
Status 15
584
Error code (4-digit Hex)
3 2 1 0
x16 x16 x16 x16
The above is the error code format of the MC Unit. An error code is valid
while the Error Flag is ON. If an error occurs, check the error type data to
find the type of error, such as a system, tasks 1 to 4, X-axis, to U-axis error.
n = CIO 2000 + 10 x unit number (words)
Description
Normal: 0000
Appendix C
Page
309