Omron CQM1H-SCB41 Operation Manual page 161

CompoWay/F Master Protocol
Send Data Word Allocation (2nd Operand of PMCR(260))
First word of
send data
Note 1. Set the number of send bytes to twice the number of bytes in memory. This is necessary because the
data is converted to ASCII data before being sent.
2. When hexadecimal data is converted to ASCII data, data is sent starting from the send data word with
the largest offset. This is done because ladder programming handles data in 4-byte units.
Receive Data Word Allocation (3rd Operand of PMCR(260))
Receive data
storage words
Note When ASCII data is converted to hexadecimal data, data is stored starting from the receive data word
with the largest offset. This is done because ladder programming handles data in 4-byte units.
146
+0 Number of send data words
(Undefined) Node No.
+1
MRC
+2
Number of send bytes
+3
+4
Send data
Offset Contents (data format)
+0 Number of send data words
(4 digits BCD)
+1 (Undefined)
+2 MRC
(2 digits Hex)
+3 Number of send bytes (4 digits
BCD)
+4 Send data (4-digit Hex)
on
Send data words
1 2 3 4
5 6 7 8
Number of receive data words
+0
Response code
+1
+2
Receive data
Offset Contents (data format)
+0 Number of receive data words
(4 digits BCD)
+1 Response code (4 digits Hex)
+2 Receive data (4-digit Hex)
on
Receive frame
"01" "23" "45" "67"
SRC
0005 to 0128
Node No. (2 dig- 00 to 99
its BCD)
SRC Set the command code for the required
(2 digits Hex) service
Number of data bytes from the next
byte after the command code until the
byte just before the ETX.
0 to 984 decimal
The data specified in hexadecimal here
will be converted to ASCII and the num-
ber of bytes specified in S+3 will be
sent.
Send frame
"56" "78" "12" "34"
0003 to 0128
The response code will be stored in
hexadecimal form.
The data from just after the response
code until just before the ETX will be
converted from ASCII to hexadecimal
and stored here.
Receive data words
4 5 6 7
0 1 2 3
Appendix B
Data
Data