INVT Goodrive350 Series, Руководство по эксплуатации

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Communication extension card PROFIBUS communication card
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writing a parameter value) of a parameter between two communication ends.
Parameter
identification (PKW)
Process data
PKW1 PKW2 PKW3 PKW4
CW
SW
PZD2
PZD2
Request
No.
Response
No.
Parameter
address
Parameter
value error
No.
Parameter
value
Structure of the PKW zone
Figure 2-5 Parameter identification zone
In the periodic PROFIBUS-DP communication, the PKW zone consists of four 16-bit words.
Table 2-9 describes each word in the PKW zone.
Table 2-9 Each word in the PKW zone
First word PKW 1 (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of the packet that the master station transmits to the VFD are no longer valid.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 2-10
describes the request and response functions.