POWER ELECTRONICS
VS65
COMMUNICATION PROTOCOL
35
7.1.2. Parameter explanation
When PPO1 is chosen, function parameters of VS65 can be read and modified. The high byte
(INDH) of parameter index (word) IND is task request, the low byte (INDL) is parameter address,
which corresponds to the address of function code. PWE is the value of visited parameter. All
values are the hexadecimal.
INDH Meaning
0 No task
1 Read a parameter at address INDL
2 Modify a parameter at address INDL; value written in PWE
Task Request
INDH Meaning
0 No response
1 Pass a parameter, value in PWE
2 No right to modify
3 Task cannot be executed.
Task Response
With the response of 3, the task can not be executed, the operated parameter cannot be read or
written. The table below is the error types. Codes of error types are read from PWE.
PWE Meaning
0 Parameter unavailable
1 Parameter cannot be modified
2 Value beyond upper/lower limit
3 Cannot be modified because it is running
4 Service not supported
Codes for task response of 3
7.1.3. Parameter operation examples
1. Operation on VS65 done by master station
Read value of the function Code 01 (rise time)
MASTER Î VS65 01 01 00 00
VS65 Î MASTER 01 01 00 0C
This means the read rise time is 12s.
2. Modify the function code 04 (current limiting) to 350%, i.e. 15E is hexadecimal.
MASTER Î VS65 02 04 01 5E
VS65 Î MASTER 01 04 01 5E
If the response code is 03 04 00 03, this means modification is denied because the starter
is running.