INVT Goodrive350 Series, Operation Manual

Page: 72 / 135

Communication extension card EtherNet/IP communication card
-67-
In periodic communication, the PKW zone consists of four 16-bit words. The following table
describes the words.
First word PKW1 (16 bits)
Bits 15–00 Task or response identification flag 0–7
Second word PKW2 (16 bits)
Bits 15–00 Basic parameter address 0–247
Third word PKW3 (16 bits)
Bits 15–00 Value (most significant word) of a parameter or
error code of the returned value
00
Fourth word PKW4 (16 bits)
Bits 15–00 Value (least significant word) of a parameter 0–65535
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of the packet that the master station transmits to the VFD are no longer valid.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.
Table 5-11 Task identification flag PKW1
Request No. (from the master to a slave) Response signal
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
Note: Requests 2, 3, and 5 are not supported currently.
Table 5-12 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)