Communication
98
Example 6: Configuring the process data written to the drive
PROFIBUS parameter 915 can be used to define which data is
written cyclically to a drive parameter as application-specific
process data.
In the example below, the value of drive parameter
12.02 (0Ch.02h) is selected to be taken from PZD3. The
parameter will continue to be updated with the contents of PZD3 in
each Request frame until a different selection is made.
Subindex (IND) defines which process data word (PZD) the
required data is taken from. Parameter Value selects the drive
parameter to which that word is mapped.
Subsequently, the contents of PZD3 in each Request frame are
written to drive parameter 12.02 CONSTANT SPEED 1 until a
different selection is made.
Req
DP
header
73 93 03 00 00 00 0C 02 04 7F 34 15 00 00 00 00 00 00 00 00
DP
trailer
Resp 43 93 03 00 00 00 0C 02 03 37 34 15 00 00 00 00 00 00 00 00
Parameter Value
CW REF
Parameter Number (915 decimal)
Request (Change parameter value [array])
Subindex (03 = PZD3)*
PZD3 PZD4 PZD5 PZD6
SW ACT
*2nd byte reserved
PZD3 PZD4 PZD5 PZD6
Parameter Value
Parameter Number (915 decimal)
Response (Transfer parameter value [array])
Subindex (03 = PZD3)*
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