25
6.9 Composition of ASCII response messages (transmitted from this product
to a high-level computer)
For the codes a) through g), see "6.10 Description of ASCII codes."
6.9.1 Response message for a read request message
a) Start code
“:”
b) Slave address
“1” , “1”
c) Function code
“0” , “3”
h) Number of byte items
“0” , “4”
Register
2
i)
First register data
(a low-level word)
High level
“0” , “0”
③
Data composition is
①
,
②
,
③
,
and
④
H. (
①
represents 1
byte.)
Low level
“0” , “0”
④
First register data
(a high-level word)
High level
“0” , “0”
①
Low level
“0” , “0”
②
f)
LRC
“5” , “3”
g) End code
CR, LF
6.9.2 Response message for a write/store request message
a) Start code
“:”
b) Slave address
“0” , “1”
c) Function code
“1” , “0”
d) Register address
High level
“0” , “1”
First register address
Low level
“0” , “0”
e) Number of registers
High level
“0” , “0”
Fixed at 2
Low level
“0” , “2”
f)
LRC
“E” , “C”
g) End code
CR, LF
6.9.3 Response message in the case of an error
a) Start code
“:”
b) Slave address
“0” , “1”
h) Function code
“8” , “3”
In the case of an error, the function
code for the request m
80H is entered.
j)
Error code
“0” , “3”
f)
LRC
“7” , “9”
g) End code
CR, LF
