212
CompoWay/F Master Protocol
Appendix B
Send Data Word Allocation (3rd Operand of PMCR(260))
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 (4th Operand of PMCR(260))
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.
Offset
Contents (data format)
Data
+0
Number of send data words
(4 digits Hex)
0005 to 00FA Hex (5 to 250 decimal)
+1
(Undefined)
Node No. (2 digits
BCD)
00 to 99
+2 MRC
(2 digits Hex)
SRC (2 digits Hex) Set the command code for the required ser-
vice
+3
Number of send bytes (4 digits Hex)
Number of data bytes from the next byte
after the command code until the byte just
before the ETX.
0000 to 03D8 Hex (0 to 984 decimal)
+4
on
Send data (4-digit Hex)
The data specified in hexadecimal here will
be converted to ASCII and the number of
bytes specified in S+3 will be sent.
Send data
First word of
send data
Number of send data words
+0
+1
+2
+3
+4
(Undefined)
MRC
SRC
Number of send bytes
Node No.
Offset
Contents (data format)
Data
+0
Number of receive data words
(4 digits Hex)
0003 to 00FA Hex (3 to 250 decimal)
+1
Response code (4 digits Hex)
The response code will be stored in hexa-
decimal form.
+2
on
Receive data (4-digit Hex)
The data from just after the response code
until just before the ETX will be converted
from ASCII to hexadecimal and stored here.
1 2 3 4
5 6 7 8
Send data words
Send frame
"56" "78" "12" "34"
Receive data
storage words
Number of receive data words
+0
+1
+2
Response code
Receive data
4 5 6 7
0 1 2 3
Receive data words
Receive frame
"01" "23" "45" "67"
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