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R-13
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
-2-7
Send/Receiv
e with ASCII Con
v
ersion and w
ith R
espo
nse
The following three communications sequences are available for send/receive with ASCII conversion
and response.
The following table shows the structure of the CompoWay/F Master Protocol.
R-2-7 Send/Receive with ASCII Conversion and with Response
Sequence
No.
Send sequence Receive sequence
600 (0258) Send word order: Rightmost to leftmost Receive word order: Leftmost to rightmost
606 (025E) Send word order: Leftmost to rightmost Receive word order: Leftmost to rightmost
607 (025F) Send word order: Rightmost to leftmost Receive word order: Rightmost to leftmost
R-2-8 Structure of the Protocol
Sequence
No.
Communications
sequence name
Function Ladder interface
Send word
allocation
Receive word
allocation
600 (0258) Send with ASCII conver-
sion, with response
Send in order from right-
most to leftmost word.
Receive in order from
leftmost to rightmost
word.
Converts the specified data beginning with
the command code (MRC, SRC) to ASCII
and sends it to the specified Unit. The
response is converted to hexadecimal and
stored starting at the specified word. Yes Yes
601 (0259) Broadcast with ASCII
conversion, no response A broadcast version of sequence No. 600.
No responses are received. Yes No
602 (025A) Send with no conversion
and with response Sends specified data beginning with the
command code to the specified Unit. The
response is stored starting at the specified
word. This is the same as sequence No.
600 without data conversion and can be
used when conversion is not required. Yes Yes
603 (025B) Broadcast with no con-
version and no response A broadcast version of sequence No. 602.
No responses are received. Yes No
604 (025C) General-purpose send
with no conversion and
with response Sends specified data beginning with the
subaddress and SID to the specified Unit.
The response is stored starting at the spec-
ified word. This sequence can be used
whenever it is necessary to specify the sub-
address or SID. Yes Yes
1 2 3 4
5 6 7 8
Send data words Send frame
"12" "34" "56" "78"
Rightmost word
Leftmost word
1 2 3 4
5 6 7 8
Receive data words
Receive frame
"12" "34" "56" "78"
Rightmost word
Leftmost word
1 2 3 4
5 6 7 8
Send data words Send frame
"56" "78" "12" "34"
Rightmost word
Leftmost word
1 2 3 4
5 6 7 8
Receive data words
Receive frame
"12" "34" "56" "78"
Rightmost word
Leftmost word
1 2 3 4
5 6 7 8
Send data words Send frame
"12" "34" "56" "78"
Rightmost word
Leftmost word
1 2 3 4
5 6 7 8
Receive data words
Receive frame
"12" "34" "56" "78"
Rightmost word
Leftmost word