Siemens SINAMICS S120, Руководство по эксплуатации функций

Страница: 1025 / 1094

Basic information about the drive system
13.12 System rules, sampling times and DRIVE-CLiQ wiring
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
1025
13.12.5 Notes on the number of controllable drives
13.12.5.1 Number of drives depending on the control mode and cycle times
The number of axes that can be operated with a Control Unit depends on the cycle times
and the control mode. The number of usable axes and the associated cycle times for each
control type are listed below. The other available remaining computation times are available
for options (e.g. DCC).
Cycle times for servo control and HLA
The following table lists the number of axes that can be operated with a Control Unit in servo
control and HLA. The number of axes is also dependent on the cycle times of the controller:
Table 13- 13 Sampling time setting for servo control
Cycle times [µs] Number Motor/dir. measur-
ing systems
TM
1)
/TB
Current con-
troller
Speed controller Axes Infeed
125 125 6 1 [250 μs] 6 / 6 3 [2000 μs]
62.5 62.5 3 1 [250 μs] 3 / 3 3 [2000 μs]
31.25
2)
31.25
2)
1 1 [250 μs] 1 / 1 3 [2000 μs]
1)
Valid for TM31 or TM15IO; restrictions are possible for TM54F, TM41, TM15, TM17, TM120, TM150 depending on the
set sampling time.
2)
In the cycle level 31.25 µs, you can also create the following objects:
Sensor Module External (SME) and SMC20 that support the current firmware and hardware. These can be recognized
from the Article end number ... 3.
No additional axis can be operated in this cycle level.
Adjustable pulse frequencies and current controller sampling times for servo control
The pulse frequencies that can be set depending on the selected current controller sampling
time are shown in r0114. Because of the integrating current measurement, pulse frequencies
that are a multiple of half the current controller sampling frequency should be preferred.
Otherwise, the current is not measured synchronous to the pulse frequency and a fluctuating
actual current value results. This causes disturbance in the control circuits and higher losses
in the motor (such as pulse frequency 5.333 kHz and current controller sampling time
62.5 μs).