Basic information about the drive system
13.12 System rules, sampling times and DRIVE-CLiQ wiring
Drive functions
1032 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Current controller sampling times for cycle mix
Consequently the smallest common multiple of the current and speed controller sampling
times of all axes operated on the isochronous PROFIBUS is used to set the base cycle for
T
i
, T
o
and T
dp
. For a cycle mix, a compromise must be sought between the base cycle to set
T
i
, T
o
and T
dp
, and the required pulse frequency.
Table 13- 22 Examples of cycle mixes for servo control
Cycle mix: Current controller sampling times
[µs]
Base cycle for T
i
, T
o
[µs]
Base cycle for T
dp
,
T
mapc
[µs]
187.50
+125.00 375 750
Base cycles for the isochronous PROFIBUS for a cycle mix with 125 μs
Table 13- 23 Examples for cycle mixes for vector control
Cycle mix: Current controller sam-
pling times [µs]
Base cycle for T
i
, T
o
[µs]
Base cycle for T
mapc
[µs]
137.50
+250.00 2750 2750 11000
Base cycles for the isochronous PROFIBUS for a cycle mix with 250 μs
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