11-26
Error character
If the request parameter value was not processed, then the error codes that will be kept in
the low-bit PWE1 set are as follows:
Error
code
Description
0 Parameter does not exist
1
The current status parameter cannot be
read/written
2 Parameter value not within range
101 Other SP communication error occurred, such as:
response timeout
PWE
Driver parameters are sent through PWE2 (4th word). In the following example, PWEI (3rd
word) must be set as 0 in the PROFIBUS master station.
Example of the PKW mechanism:
For example: Read parameters 00-05 (frequency command source).
Read the values of 00-05; first set the request identification character as 1, and then refer
to the MODBUS communication protocol description chapter in the driver manual to find
out that the address of 00-05 is 0x0005, then the data sequences are as follows:
PLC master station driver slave station: 1000 0005 0000 0000
Driver slave station PLC master station: 1000 0005 0000 0004
Request Response
1st word
(PKE)
1000
1st word (PKE)
1000
2nd word
(IND)
0005
2nd word (IND)
0005
3rd word
(PWE1)
0000
3rd word (PWE1)
0000
4th word
(PWE2)
0000
4th word (PWE2)
0004
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