Example.
Data saving to register 40124 (Cp SV value)
40-06-00-7C-04-D3-CRCLo-CRCHi
Response
- confirming the data saving to register 40126 (Temperature SV value)
Byte no.
Designation
Size
Value [hex]
00
Converter Address
1- Byte
40 [01 to F7]
01
Code of the function
1- Byte
06
02
Address of the register hee 1- Byte
00
03
Address of the register Lo
1- Byte
7 D
04
Value of the register hee
1- Byte
04
05
Value of the register Lo
1- Byte
D3
06
CRC-Lo
1- Byte
- - -
07
CRC-Hi
1- Byte
- - -
Example.
Confirmation the data saving to register 40126 (Temperature SV value)
40-06-00-7D-04-D3-CRCLo-CRCHi
In response the converter sends the frame – confirming saving to the register.
Response
- in case of error
Byte no.
Designation
Size
Value [hex]
00
Converter Address
1-Byte
40 [01 to F7]
01
Code of the function 1- Byte
86
02
Error code
1- Byte
01-unknown function
02-unknown data address
03-unknown amount of data
04-JCT controller is not responding, is not connected, or is damaged
03
CRC-Lo
1- Byte
- - -
04
CRC-Hi
1- Byte
- - -
8.4. EXCEPTIONS OF THE MODBUS-RTU PROTOCOL
ADA-4040PC8 in case of received MODBUS-RTU frame, includes:
- unsupported function,
- unknown data address,
- unknown data value
- or when JCT controller not respond on inquiries returns
to MASTER type device the frame containing the appropriate exception – described below.
Response – in case of error
Byte no.
Designation
Size
Value [hex]
00
Converter Address
1- Byte
40 [01 to F7]
01
Code of the function 1- Byte
80 + FC (Code of the function)
02
Error code
1- Byte
01-unknown function
02-unknown data address
03-unknown amount/value of data
04-JCT controller is not responding, is not connected, or is damaged
03
CRC-Lo
1- Byte
- - -
04
CRC-Hi
1- Byte
- - -
15
ADA-4040PC8
