SMC Networks HRR018-A-10 Series Operation Manual page 111

14.
Press the [▼] key. Displays serial communication status.
Refer to the table below for the status code.
Communication
status code
8001
4801
4401
4201
0101
0081
0041
0021
0011
0008
0004
0002
0000
HRR Series
Status code
COMM ⇒ STUS (Alternately displayed)
Normal message
Number of data is different
Data address is different
FUNCTION is not supported
Modbus format is different
Slave address is different
CRC is different
LRC is different
Chiller mode is ASCII but customer uses RTU.
Communication condition is different (start bit/stop bit or communication
speed is different).
Communication condition is different (not even number parity)
Overrun error
Wiring or connection failure. Customer's message is not sent.
Chapter 5 Display and Setting of Various Functions
Contents
HRX-OM-W002
5.5 Advanced setting mode
5-61