Omron CJ1W-SCU32 Operation Manual page 358

A Standard System Protocol
Receive Data Word Allocation (4th Operand of PMCR(260))
Receive data
storage words
Offset
+0 Number of receive data words (4 digits hex)
+1 Response code (4 digits hex)
+2 Receive data (4 digits hex)
on
The received frames are stored in order from the leftmost word to rightmost word of the I/O memory
address.
R-24
+0
Number of receive data words
+1
Response code
+2
Receive data
on
Contents (data format)
Receive frame
"12" "34" "56" "78"
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
0003 to 00FA Hex (3 to 250 decimal)
The CompoWay/F command response code will
be stored in hexadecimal code
The data from just after the response code until
just before the ETX is converted from ASCII to
hexadecimal and stored in order from the leftmost
word to the rightmost word.
Receive data words
Rightmost word
5 6 7 8
Leftmost word
1 2 3 4
Data