Goodrive3000 series medium voltage VFD
PROFIBUS communication
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Table 9-3 Task identification flag PKW1
Request No. (from the master to a slave)
Response No. (from a
slave to the master)
Request
No.
Function
Acceptance
Rejection
0
No task.
0
–
1
Requesting the value of a parameter
1, 2
3
2
Modifying a parameter value (one word) [modifying the value
only on RAM]
1
3 or 4
3
Modifying a parameter value (two words) [modifying the value
only on RAM]
2
3 or 4
4
Modifying a parameter value (one word) [modifying the value on
both RAM and EEPROM]
1
3 or 4
5
Modifying a parameter value (two words) [modifying the value on
both RAM and EEPROM]
2
3 or 4
The definition of response identification flag PKW1 is as follows:
Table 9-4 Response identification flag PKW1
Response No. (from a slave to the master)
Response
No.
Function
0
No response
1
Transmitting the value of a parameter (one word)
2
Transmitting the value of a parameter (two words)
3
The task cannot be executed and one of the following error number is returned:
0: Invalid parameter number
1: Parameter values cannot be changed (read-only parameter)
2: Out of set value range
3: Incorrect sub-index number
4: Setting is not allowed (reset only)
5. Invalid data type
6: The task could not be implemented due to operational state
7: Request is not supported
8: Request cannot be completed due to communication error
9: Fault occurs during the write operation to fixed storage zone
10: Request failed due to timeout
11: Parameter cannot be assigned to PZD
12: Control word bit cannot be allocated
13: Other faults
4
No parameter modification rights
PKW examples:
Example 1: Reading the value of a parameter
You can set PKW1 to 1 and PKW2 to 4 to read a frequency set through keypad (the address of the frequency set through
keypad is 4), and the value is returned in PKW4.
Request (from the master station to the VFD):
