CARLO GAVAZZI VariFlex3 RVLF Series - Accessing Parameter Via PKW Area

Motor Controllers AC Variable Frequency Drives Type VariFlex
3
RVLF
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• PKE
Bit 0 to 11 (PNU) contain the MODBUS address of the relevant parameter.
Please refer to Appendix B: RVLF series drive MODBUS address allocation.
Bits 12 to 15(AK) contain the request or the response identifier.
3.3.5. Accessing parameter via PKW area
In cyclical data, RV-PDP can provide request and response message to access the RVLF
series parameters. Due to the request and response mechanism, the master must send the
request until receives a corresponding response. Following 4 words are for PKW area:
Word 1 Parameter ID (PKE)
bit
15
AK
12 11 0
Parameter number(PNU)
Word 2 IND Reserved
Word 3 PWE1
Request identifier (Master RV-PDP)
Request Identier Description
0 No request
1 Read parameter value
2 Modify parameter value
Response identifier (RV-PDP Master)
Request Identier Description
0 No response
1 Request parameter value processed
7 Request parameter value cannot process
If request parameter value cannot be processed, and the fault numbers following will be stored
in the low byte of PWE1.
NO. Description
0 Parameter does not exist
1 Parameter can not change in current state
2
Parameter value minimum/maximum not
reached/exceeded
101
Other SP communication error occur, e.g.
response time over
bit
15 8 7 0
Reserved Fault number
Word 4 PWE2 Read/Write parameters