Endress+Hauser Liquiline CM44 series - FC03 Read Holding Register; FC04 Read Input Register

SD01189C/07/EN/04.17
Endress+Hauser
10 © Copyright Dec. 2016
3.4.1 FC03 Read Holding Register
Request
Function code
1 Byte
0x03
Starting address
2 Byte
0x0000 to 0xFFFF
Quantity of Registers
2 Byte
1 to 125 (0x7D)
Response
Function code
1 Byte
0x03
Byte Count
1 Byte
2 * Quantity of Registers
Holding register value
(2 * Quantity of Registers) Byte
2 to 250
Error
Error code
1 Byte
0x83
Exception code
1 Byte
01 or 02 or 03 or 04
3.4.2 FC04 Read Input Register
Request
Function code
1 Byte
0x04
Starting address
2 Byte
0x0000 to 0xFFFF
Quantity of Registers
2 Byte
1 to 125 (0x7D)
Reply
Function code
1 Byte
0x04
Byte Count
1 Byte
2 * Quantity of Registers
Holding register value
(2 * Quantity of Registers) Byte
2 to 250
Error
Error code
1 Byte
0x84
Exception code
1 Byte
01 or 02 or 03 or 04