Omron CQM1H-SCB41 Operation Manual page 47

Control Bits, Flags, and Status Information
Word Bit(s)
254 15 Inner Board Error Flag
Turns ON when an error occurs in an Inner Board mounted in slot 1 or slot 2. The error code for
slot 1 is stored in AR 0400 to AR 0407 and the error code for slot 2 is stored in AR 0408 to AR
0415.
AR 04 00 to 07 Slot 1 Inner Board Error Code (Hex)
00:
01, 02: Hardware error
10:
32
Normal
Serial Communications Board error
Note Supported on products with lot number of No. 0320* or later.
Reading lot numbers:
...Produced February 3, 2000
0 3 2 0
Production year: Last digit of the year
Production month: 1 to 9, X (10), Y (11), Z (12)
Production day: 01 to 31
Function
Section 3-3