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HRX-OM-S010
Chapter 5 Simple communication protocol function
5.9
Negative response
HRS100/150 Series
5-22
5.9 Negative response
If the request is not normal when receiving the request, or the request
cannot be received due to the state of the product, a negative response is
returned. Refer to the exception codes in Table 5.5-1 for exceptions.
Response message <Normal> (Slave to Master)
STX
Slave Address
NAK
ETX
BCC
[STX]
XX
XX
[NAK]
XX
[ETX]
XX
Communication example
○Slave Address
:
No 1
○Writing of the circulating fluid set temperature when the communication
range setting is RO (read only).
Request message
Response message
Code
Contents
Code
Contents
01
Slave Address
01
Slave Address
W
Request message to write
[NAK]
Negative response message
SV1
Circulating fluid set temperature
2
Exception code for setting is prohibited
00258
Write information (15.1
o
C)
[39h]
BCC value
[5Ch]
BCC value
Exception code
Your system
This product
(Request)
[
STX
]
01WSV100258[ETX][5Ch]
(Response)
[
STX
]
01
[
NAK]2[ETX][39h]
Data is sent and
received in ASCII
code.