Yamato Scientific CLH600 Cool Line - Manual (Page 35)

32
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 ⑦ ⑩
① Start code
② Address
⑥ End code
⑦ BCC data
⑨
Negative
acknowledgement
code
⑩ ERR type