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A Standard System Protocol
R-12
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
The CompoWay/F Master Protocol provides 18 communications sequences that can be used for the fol-
lowing:
• Converting to ASCII data or not converting to ASCII data
• Sending to a specified Unit or broadcasting
• Specifying with the command code or specifying with the subaddress and SID.
The relationship between the CompoWay/F command and response frames and the operands of
PMCR(260) is shown below, using communications sequence No. 600 as an example.
Command Frame
Response Frame
R-2-5 CompoWay/F Master Protocol Sequences
R-2-6 CompoWay/F Message Frames and PMCR(260) Operands
Communications sequence No. 600 (0258 Hex)
Node No.
Command
Send data
Variable
type First read
address
PMCR(260) Instruction
Number of send data words
(Undefined) Node number
Number of send bytes
Send data
S
S+1
S+2
S+3
S+4
S+5
S+6
Subaddress
No. of
elements
#0258
"00" "0" "01" "00" "01" "C0" "0000" "0001"
Node No.
Response code
(Read data)
Response code
Receive data
PMCR(260) Instruction
Number of receive data words
Response code
Receive data
D
D+1
D+2
D+3
Subaddress End code
Receive data
"00" "01" "01"
#0258