INVT Goodrive3000 Series Operation Manual page 283

Goodrive3000 series medium voltage VFD
In the periodic communication, the PKW zone consists of four 16-bit words. The following table describes
the definition of each word.
Word
First word PKW1 (16
bits)
Second word PKW2
(16 bits)
Third word PKW3 (16
bits)
Fourth word PKW4
(16 bits)
Note: If the master node requests the value of a parameter, the values in PKW3 and PKW4 of the packet
that the master node transmits to the VFD are no longer valid.
Task request and response: When transmitting data to a slave node, the master node uses a request
number, and the slave uses a response number to accept or reject the request.
Request (from master to slave)
No.
0
1
Modifying a parameter value (one word) [modifying the
2
Modifying a parameter value (two words) [modifying the
3
Modifying a parameter value (one word) [modifying the
4
Modifying a parameter value (two words) [modifying the
5
Parameter
identification (PKW)
PKW1 PKW2 PKW3
Request
Parameter
No. Parameter
value error
Response address
No.
No.l
Figure 9.9 Parameter identification zone
Bit
Bits 15–00 Task or response identification flag
Bits 15–00
Value (most significant word) of a parameter or
Bits 15–00
Bits 15–00 Value (low-order bits) of a parameter
Table 9.3 Definition of the task identification flag PKW1
Function
No task
Requesting the value of a parameter
value only on RAM]
value only on RAM]
value on both RAM and EEPROM]
value on both RAM and EEPROM]
Process data
CW PZD2
PKW4
PZD2
SW
Parameter
value
Defintion
Basic parameter address
error code of the returned value
-278-
PROFIBUS communication
Range
0–7
0–247
00
0–65535
Response signal (from
slave to master)
Acceptance Rejection
–
0
1, 2 3
1 3 or 4
2 3 or 4
1 3 or 4
2 3 or 4