Efficient Networks Siemens Sinamics S120 - Manual (Page 394)

Communication PROFIBUS DP/PROFINET IO
10.1 Communications according to PROFIdrive
Drive Functions
394
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
10.1.4.2 Structure of orders and responses
Structure of parameter request and parameter response
Parameter request Offset
Request reference Request ID 0 Request header
Axis No. of parameters 2
Attribute No. of elements 4
Parameter number 6
1. parameter address
Subindex 8
...
Attribute No. of elements
Parameter number
nth parameter address
Subindex
Format No. of values
Values
1. parameter value(s)
...
...
Format No. of values
Values
Values for
write access
only
nth parameter value(s)
...
Parameter response Offset
Request reference mirrored Response ID 0 Response header
Axis mirrored No. of parameters 2
Format No. of values 4
Values or error values 6
1. parameter value(s)
...
...
Format No. of values
Values or error values
Values for
read access
only
Error values
for negative
response only
nth parameter value(s)
...
Description of fields in DPV1 parameter request and response
Field Data type Values Comment
Unsigned8 0x01 ... 0xFF Request reference
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
0x02
Read request
Write request