System Sampling Times And Number Of Controllable Drives; Notes On The Number Of Controllable Drives - Siemens SINAMICS S120 Function Manual

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Basic information about the drive system

12.12 System sampling times and number of controllable drives

System sampling times and number of controllable drives

The software functions installed in the system are executed cyclically with different sampling

times (p0115, p0799, p4099).

The sampling times of the functions are automatically pre-assigned when configuring the

These settings are based on the selected mode (vector/servo control), the number of

connected components, and the functions activated.

The sampling times can be adjusted using parameter p0112 (sampling times, presetting

p0115), p0113 (pulse frequency, minimum selection) or directly using p0115.

For p0092 = 1, the sampling times are pre-assigned so that isochronous operation together

with a controller is possible. If isochronous operation is not possible due to incorrect

sampling time settings, then an appropriate message is output (A01223, A01224). Before the

automatic configuration, parameter p0092 must be set to "1" in order that the sampling times

are appropriately preset.

Any change to the preset sampling times should only be performed by experts.

The number and type of controlled axes and the additionally activated functions can be

scaled by configuring the firmware. Especially for demanding configurations, drives with high

dynamics or a large number of axes with additional utilization of special functions for

example, a check using the SIZER engineering tool is recommended. The SIZER

engineering tool calculates the feasibility of the project.

The maximum possible functionality depends on the performance of the Control Unit used

and the components configured.

This chapter lists the number of axes that can be operated with a Control Unit. The number

of axes depends on the cycle times and the control mode. The other available remaining

computation times are available for options (e.g. DCC).

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Drive functions

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