INVT Goodrive35 Series Operation Manual page 258

Goodrive35 Series Closed-loop Vector Control VFD
Bit
PKW area (parameter identification marks PKW1-value area). PKW area describes treatment of
parameter identification interface, PKW interface is a mechanism which determine parameters
transmission between two communication partners, such as reading and writing parameter values.
Structure of PKW zone (PWK)
PKW1 PKW2 PKW3 PKW4
Request
mark
Response
mark
In the process of periodic PROFIBUS-DP communication, PKW area is composed of four words (16
bit), each word is defined as follows:
The first word PKW1 (16 bit)
Bit 15–00
The second word PKW2 (16 bit)
Bit 15–00
The third word PKW3 (16 bit)
Bit 15–00
The fourth word PKW4 (16 bit)
Bit 15–00
Note: If the master requests one parameter value, the value of PKW3 and PKW4 will not be valid.
Task requests and responses: When passing data to slave machine, master machine use request
label while slave machine use response label to positive or negative confirmation. The following table
lists the request/response functional.
The definition of task logo PKW1 is as follows:
Name
21: MSB of position reference (signed
digit)
22: LSB of position reference (unsigned
digit)
23: MSB of position feedback (signed digit)
24: LSB of position feedback (unsigned
digit)
25: State words
Parameter
Fault code
address
Parameter identification zone
Task or response identification marks
Basic parameters address
Parameter value (high word) or return error code value
Parameter value (low word)
Process data
CW
SW
Parameters
251
Extension card
Function selection
PZD2
PZD2 ......
0–7
0–247
00
0–65535