Endress+Hauser Liquiline CM44 series - FC16 Write Multiple Register; FC23 Read;Write Multiple Register

SD01189C/07/EN/04.17
Endress+Hauser
12 © Copyright Dec. 2016
3.4.4 FC16 Write Multiple Register
Request
Function code
1 Byte
0x10
Starting address
2 Byte
0x0000 to 0xFFFF
Quantity of Registers
2 Byte
0x0001 to 0x007B
Byte Count
1 Byte
(2 * Quantity of Registers) Byte
Register Value
(2 * Quantity of Registers) Byte
value
Response
Function code
1 Byte
0x10
Byte Count
2 Byte
0x0000 to 0xFFFF
Quantity of Registers
2 Byte
1 to 123 (0x7B)
Error
Error code
1 Byte
0x90
Exception code
1 Byte
01 or 02 or 03 or 04
3.4.5 FC23 Read/Write Multiple Register
Request
Function code
1 Byte
0x17
Read starting address
2 Byte
0x0000 to 0xFFFF
Quantity to read
2 Byte
0x0001 to 0x007D
Write starting address
2 Byte
0x0000 to 0xFFFF
Quantity to write
2 Byte
0x0001 to 0x0079
Write byte count
1 Byte
2 x (Quantity to write)
Write register value
2 x (Quantity to write)
Response
Function code
1 Byte
1 Byte
Byte Count
2 Byte
Data
N x 2 Byte
Error
Error code
1 Byte
0x97
Exception code
1 Byte
01 or 03 or 04
This function code can be used to read or to write the complete process data with one Modbus request.