Efficient Networks S120 manual Parameter request Offset, Parameter response Offset

Communication PROFIBUS DP/PROFINET IO 10.1 Communications according to PROFIdrive

10.1.4.2Structure of orders and responses

Structure of parameter request and parameter response

	Parameter request			Offset
Values for	Request header	Request reference	Request ID	0
write access		Axis	No. of parameters	2
only
	1. parameter address	Attribute	No. of elements	4
		Parameter number		6
		Subindex		8
	...
	nth parameter address	Attribute	No. of elements
		Parameter number
		Subindex
	1. parameter value(s)	Format	No. of values
		Values
		...
	...
	nth parameter value(s)	Format	No. of values
		Values
		...

	Parameter response			Offset
Values for	Response header	Request reference mirrored	Response ID	0
read access		Axis mirrored	No. of parameters	2
only
	1. parameter value(s)	Format	No. of values	4
Error values
		Values or error values		6
for negative
response only		...
	...
	nth parameter value(s)	Format	No. of values
		Values or error values
		...

Description of fields in DPV1 parameter request and response

Field	Data type	Values	Comment
Request reference	Unsigned8	0x01 ... 0xFF
	Unique identification of the request/response pair for the master. The master changes the
	request reference with each new request. The slave mirrors the request reference in its
	response.
Request ID	Unsigned8	0x01	Read request
		0x02	Write request

394	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4