INVT Goodrive350 Series Operation Manual page 72

Communication extension card
In periodic communication, the PKW zone consists of four 16-bit words. The following table
describes the words.
Bits 15–00
Bits 15–00
Bits 15–00
Bits 15–00
Note: If the master station requests the value of a parameter, the values in PKW3 and PKW4
of the packet that the master station transmits to the VFD are no longer valid.
Task request and response: When transmitting data to a slave, the master uses a request
number, and the slave uses a response number to accept or reject the request.
Request No. (from the master to a slave)
Request
No.
0 No task
1 Requesting the value of a parameter
Modifying a parameter value (one word) [modifying
2
the value only on RAM]
Modifying a parameter value (two words) [modifying
3
the value only on RAM]
Modifying a parameter value (one word) [modifying
4
the value on both RAM and EEPROM]
Modifying a parameter value (two words) [modifying
5
the value on both RAM and EEPROM]
Note: Requests 2, 3, and 5 are not supported currently.
Response No.
0
1
2
First word PKW1 (16 bits)
Task or response identification flag
Second word PKW2 (16 bits)
Basic parameter address
Third word PKW3 (16 bits)
Value (most significant word) of a parameter or
error code of the returned value
Fourth word PKW4 (16 bits)
Value (least significant word) of a parameter
Table 5-11 Task identification flag PKW1
Function
Table 5-12 Response identification flag PKW1
Response No. (from a slave to the master)
No response
Transmitting the value of a parameter (one word)
Transmitting the value of a parameter (two words)
EtherNet/IP communication card
Function
-67-
0–7
0–247
00
0–65535
Response signal
Acceptance Rejection
0
1, 2
1 3 or 4
2 3 or 4
1 3 or 4
2 3 or 4
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3