Delta PD-01 user manual Accessing parameters via PKW area, Request Identifier Meaning

PD-01 PROFIBUS-DP Module

NOTE:

Table above is for reference only, please check VFD series Drives user manual for

details. PD-01 will get the status word from VFD series Drives, so the bit assignments in the user manual of VFD series Drives is valid.

Accessing parameters via PKW area

In cyclical data, PD-01 can provide request and response (read / write) message to access the parameters of VFD series Drives. Due to the request and response mechanism, the master must send the request until it receives a corresponding response.

PKW have at least 4 words:

Word 1	Parameter ID (PKE)
	15	12		11	10		0
	AK			SPM	Parameter number (PNU)
Word 2	Parameter sub-index (IND)
	15				8	7	0
Word 3	PWE1		reserved in PD-01
Word 4	PWE2		parameter value of read/write

PKE

Bits 0 to 10 (PNU) contain the number of the relevant parameter.

Bit 11 is reserved.

Bits 12 to 15 (AK) contain the request or the response identifier.

Request identifier (master		PD-01)
	Request Identifier	Meaning
	0	No request
	1	Request parameter value
	2	Modify parameter value (word)

Response identifier (PD-01 master)

Response Identifier	Meaning
0	No response
1	Transfer parameter value (word)
7	Cannot process request (with error number)

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