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R-47
A Standard System Protocol
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
R-3 Mitsubi
s
h
i Co
mputer
Link
Ma
ster
(A-c
o
m
pati
b
le
1C
Fra
m
e
, Model
1)
Re
f
R
-3-5
Str
ucture of
the Protocol
This sequence sends the text data of a user-specified Computer Link command to the Mitsubishi Com-
puter Link Module with the specified station number (and the PLC number that follows) without convert-
ing into ASCII. The response data is stored in the CS/CJ-series CPU Unit starting from the specified
word without converting into hexadecimal.
Send Data Word Allocation (3rd Operand of PMCR(260))
Receive Data Word Allocation (4th Operand of PMCR(260))
Send/Receive User-specified Computer Link Commands without
Conversion
(Sequence No. 801 (Hex 0321)) Command Code: User-specified
Offset Contents (data format) Data
+0 Number of send data words (4 digits hex) 0004 to 00FA hex (4 to 250 decimal)
+1 Station No.
(2 digits hex) PLC No.
(2 digits hex) Station No.: 00 to FF hex
PLC No.: 00 to FF hex
+2 Command (4 digits hex) Specify the service command code to be used in
ASCII.
+3 Number of send bytes (4 digits hex) 0000 to 007A hex (0 to 122 decimal)
Note: The hexidecimal data is sent as is on the
communication line, so specify the actual number
of bytes of text data in S+5 onwards.
+4
on Text data Specify the text data for the command. The speci-
fied hexadecimal data will be sent as is.
Offset Contents (data format) Data
+0 Number of receive data bytes 0002 to 00FA hex (2 to 250 decimal)
+1 Station No.
(2 digits hex) PLC No.
(2 digits hex) Station No: 00 to FF hex
PLC No.: 00 to FF hex
+2
on Receive data (4 digits hex) Any receive data is converted into hexadecimal
and stored.
Number of send bytes
Number of send data words +0
+1
+2
PLC No.
+3
+4
on
Station No.
Command
Text data
First word of
send data
Receive data
storage words
Number of receive data words +0
+1
PLC No.
+2
on
Station No.
Receive data