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Seidel
VII.11
Sample telegrams
09/02
Writing a parameter
Parameter v_max is used as an example to show how control parameters are transmitted from the
master to the SERVOSTAR.
Parameter number:
Parameter value:
1265
350000 µm/s
100 1111 0001
0100 0011 1010 1111 0000 0000 0000 0000
Byte 1
2
3
4
5
6
7
8
0011 0100 1111 0001 0000 0000 0000 0000 0000 0000 0000 0101 01010111 0011 0000
PKE
IND
PWE
Note: after an error has occurred in parameter transmission (AK = 7), a “Zero telegram” should be
transmitted, i.e. the first 8 bytes of the transmit telegram from the PLC should be kept at 0, until the
SERVOSTAR 400/600 has responded with a zero telegram.
VII.12
Read actual values
Cyclical actual value request
This PKW task switches on the reading of an actual value. The actual value will now be transmitted
with each cyclical telegram – until a new PKW task is presented.
Telegram layout:
PKE/AK
PKE/PNU
IND
PWE
Request
1
Parameter number of the actual values (1400..1413)
0=
read
no significance
PROFIBUS for SERVOSTAR 400/600
Response
2
as transmitted
0
actual value
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