Siemens SINAMICS S120 Function Manual page 851

The following supplementary conditions must be observed for isochronous operation:
● The PROFIBUS cycle T
● The PROFIBUS cycle T
● The times T
● The times T
● T
● Because T
● p0092 = 1 (isochronous operation preassignment/validation) sets default values for the
● The setting rules for the safety actual value acquisition cycle and the safety monitoring
The above conditions mean that the smallest common multiple (kgV) 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 13- 14 Settings for activated isochronous operation
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
(time of incorporation of actual value) and T
i
specification) must be integer multiples of 125 μs.
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
are affected and run with the same setting.
controller cycles for isochronous PROFIdrive operation during the initial commissioning.
– The current controller cycles from Table 13-18 Pulse frequencies and current
controller cycles for servo control (Page 867) can be set for servo control.
– The current controller cycles from Table 13-20 Pulse frequencies and current
controller cycles for vector control (Page 868) can be set for vector control.
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
acquisition cycle (p9511). For p9511 = 0, the isochronous PROFIBUS cycle T
used as the actual value acquisition cycle.
– 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
and T .
o
.
dp
T [µs]
i
500
500
1500
13.10 System rules, sampling times and DRIVE-CLiQ wiring
must be an integer multiple of 250 μs.
dp
must be an integer multiple of the current controller cycle.
dp
T [µs]
o
500
1000
1500
Basic information about the drive system
(time for setpoint value
o
T
is
dp
i
, T
i o
[µs]
dp
500
1000
1500
851