JUMO mTRON T Manual page 35

3.6.4 Write one word
In the write word function, the data blocks for the instruction and response are identical.
Instruction
Slave address
1 byte
Response
Slave address
1 byte
Example
In this example, a command is to be written to program generator 1 of the central processing
unit. The slave address of the central processing unit here is 1, the word address is 0x1691
(Kapitel 7.2 "Central processing unit addresses", ab Seite 77), and the value to be written is to
be 5 for manual mode.
Instruction:
01
Slave
Response:
01
Slave
Function
0x06
1 byte
Function
0x06
1 byte
06 16 91
Function Word address
06 16 91
Function Word address
3 Modbus protocol description
Word address
2 bytes
Word address
2 bytes
00 05
Value
00 05
Value
Word value Checksum CRC
2 bytes
Word value Checksum
2 bytes
6C 1C
CRC
6C 1C
CRC
2 bytes
CRC
2 bytes
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