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Modbus services
36 S1A53844 01/2011
Write Single Register (6)
The Write Single Register function permits to write value of one parameter. Not all Altivar 212 parameters can
be written.
Request and response:
Error response:
Example: Write value 60 Hz to the parameter [Frequency reference from serial comm.] (FA01) in Altivar
212 slave 1.
Request and response:
Example: Error response due to invalid register address.
Request:
Error response:
Slave no. Function code
06
Register address Register value CRC16
Hi Lo Hi Lo Lo Hi
1 byte 1 byte 2 bytes 2 bytes 2 bytes
Slave no. 86 Exception code
CRC16
Lo Hi
1byte 1byte 1byte 1byte
01 06 FA01 1770 E6C6
01 06 FFFF 0000 89EE
01 86 02 C3A1