Communication protocol 173
Example 5: Determining the source of process data read from
the drive
PROFIdrive parameter 916 (394h) can be used to define which
data is read cyclically from the drive as application-specific process
data. In the example below, the parameter is used to determine
which drive parameter the contents of PZD3 are taken from.
Subindex (IND) defines which process data word the required data
is transmitted in.
• DP-V1 Write request:
DP
header
5F 01 2F 0A 0B 01 01 01 10 01 03 94 00 03 DP
trailer
DP-V1
Response
PROFIdrive V3 Parameter Channel
Function number
Slot number
Index
Data length
Request reference
Request ID (01h = Read)
Number of parameters
Drive object ID
Number of elements
Attribute (10h = Value)
Parameter index
Subindex
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