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R-27
A Standard System Protocol
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
R
-2
Com
p
o
W
a
y
/F Mast
er Pr
otoc
o
l
Re
f
R
-2-8
Str
ucture of
the Protocol
Receive Data Word Allocation (4th Operand of PMCR(260))
The received frames are stored in order from the leftmost word to the rightmost word of the I/O
memory address.
Offset
Contents (data format)
Data
+0
Number of receive data words
0003 to 00FA Hex (3 to 250 decimal)
+1
Response code (4 digits hex)
The CompoWay/F command response code is
stored in hexadecimal code.
+2
on
Receive data (4 digits hex)
The read data is stored.
Receive data
storage words
+0
+1
+2
on
Number of receive data words
Response code
Receive data
1 2 3 4
5 6 7 8
Receive data words
Receive frame
"12" "34" "56" "78"
Rightmost word
Leftmost word