Siemens Sinamics s120 Commissioning Manual page 43

The following supplementary conditions must be observed for isochronous operation:
● The PROFIBUS cycle T
● The PROFIBUS cycle T
● The times T
specification) must be integer multiples of 125 μs.
● The times T
● T
● Because T
are affected and run with the same setting.
● p0092 = 1 (isochronous operation preassignment/validation) sets default values for the
controller cycles for isochronous PROFIdrive operation during the initial commissioning.
– The current controller cycles from "Table 2-9 Pulse frequencies and current controller
– The current controller cycles from "Table 2-11 Pulse frequencies and current controller
● The setting rules for the safety actual value acquisition cycle and the safety monitoring
cycle must be observed (for details, see SINAMICS S120 Safety Integrated Function
Manual):
– The monitoring cycle (p9500) must be an integer multiple of the actual value
– Actual value acquisition cycle ≥ 4 x current controller cycle.
– The DP cycle should be at least one current controller cycle longer than the sum of T
The above conditions mean that the smallest common multiple of the current controller
cycles of all axes operated on the isochronous PROFIBUS and 125 µs is used to set T
and T
If isochronous operation is not possible due to incorrect sampling time settings, an
appropriate message will be output (A01223, A01224).
Cycle settings for SINAMICS Link
SINAMICS Link permits only three cycle settings:
Table 2- 5
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
dp
dp
(time of incorporation of actual value) and T
i
and T must be an integer multiple of the current controller cycle.
i o
is an integer multiple of the speed controller cycle.
mapc
and T are always predefined for a PROFIBUS line, all drives of a Control Unit
i o
cycles for servo control (Page 59)" can be set for servo control.
cycles for vector control (Page 60)" can be set for vector control.
acquisition cycle (p9511). For p9511 = 0, the isochronous PROFIBUS cycle T
used as the actual value acquisition cycle.
and T .
o
.
dp
Settings for activated isochronous operation
T [µs]
i
500
500
1500
2.5 System rules, sampling times and DRIVE-CLiQ wiring
must be an integer multiple of 250 μs.
must be an integer multiple of the current controller cycle.
T [µs]
o
500
1000
1500
Preparation for commissioning
(time for setpoint value
o
T [µs]
dp
500
1000
1500
is
dp
i
, T
i o
43