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R-35
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
This sequence reads the Controller/component model and communications buffer size from the speci-
fied node and stores the data starting at the specified word.
Send Data Word Allocation (3rd Operand of PMCR(260))
Receive Data Word Allocation (4th Operand of PMCR(260))
This sequence reads the Controller/component status from the specified node and stores the data
starting at the specified word.
Send Data Word Allocation (3rd Operand of PMCR(260))
Unit Properties Read
(Sequence No. 618 (Hex 026A))
Offset Contents (data format) Data
+0 Number of send data words Always 0002 hex (2 decimal)
+1 (Undefined) Node No.
(2 digits BCD) 00 to 99
Offset Contents (data format) Data
+0 Number of receive data words Always 0006 Hex (6 decimal)
+1 Response code (4 digits hex) The CompoWay/F command response code is
stored in hexadecimal code.
+2 Model number (10 digits hex) The model number is stored in hexadecimal code.
+3
+4 (Undefined)
+5 Buffer size (4 digits hex) The send/receive buffer size is stored in hexadeci-
mal code.
Controller Status Read
(Sequence No. 619 (Hex 026B))
Offset Contents (data format) Data
+0 Number of send data words Always 0002 hex (2 decimal)
+1 (Undefined) Node No.
(2 digits BCD) 00 to 99
First word of
send data
Number of send data words
+0
+1 (Undefined)
Node No.
Receive data
storage words
+0
+1
+2
Model number
Number of receive data words
Response code
+3
+4
+5
Buffer size
(Undefined)
First word of
send data
Number of send data words
+0
+1 (Undefined)
Node No.