Owner's manual

30
Operation Method
RS485 Communication Function
4.4 Reply Message Structures
4.4.1 Reply Messages to Read Request Messages
S
T
X
□ □
A
C
K
□ □ □ □ □ □ □ □
E
T
X
B
C
C
4.4.2 Reply Messages to Write Request/Storage Request Messages
S
T
X
□ □
A
C
K
E
T
X
B
C
C
4.4.3 Reply Messages In Case of an Error
S
T
X
□ □
N
A
K
□
E
T
X
B
C
C
① ② ⑧ ④ ⑥ ⑦ ⑤
① Start code
② Address
④ Identifier
⑤ Numeric data
⑥ End code
⑦ BCC data
⑧
Acknowledgement
code
① ② ⑧ ⑥ ⑦
① Start code
② Address
⑥ End code
⑦ BCC data
⑧
Acknowledgement
code
① ② ⑨ ⑥ ⑦⑩
① Start code
② Address
⑥ End code
⑦ BCC data
⑨
Negative
acknowledgement
code
⑩ ERR type