Asynchronous Pulse Frequency - Siemens Sinamics S120 Function Manual

Vector control

4.26 Asynchronous pulse frequency

Synchronization
● p3800[0...n] activate sync-line-drive
● p3801[0...n] sync-line-drive, drive object number
● p3802[0...n] BI: Sync-line-drive enable
● r3803.0 CO/BO: Sync-line-drive control word
● r3804 CO: Sync-line-drive target frequency
● r3805 CO: Sync-line-drive frequency difference
● p3806[0...n] sync-line-drive frequency difference threshold value
● r3808 CO: Sync-line-drive phase difference
● p3809[0...n] sync-line-drive phase setpoint
● p3811[0...n] sync-line-drive, frequency limiting
● r3812 CO: Sync line drive correction frequency
● p3813[0...n] sync-line-drive phase synchronism threshold value
● r3814 CO: Sync line drive voltage difference
● p3815[0...n] sync-line-drive voltage difference threshold value
● p3816 CI: Sync line-drive voltage actual value U12 = U1 – U2
● p3817 CI: Sync line-drive voltage actual value U23 = U2 – U3
● r3819.0...7 CO/BO: Sync-line-drive status word
4.26 Asynchronous pulse frequency
4.26.1 Asynchronous pulse frequency
The pulse frequency is coupled to the current controller clock cycle, and can only be
adjusted in multiple integer steps. For most standard applications, this setting makes sense
and should not be modified.
For certain applications, it may be advantageous if the pulse frequency is decoupled from
the current controller clock cycle. The consequences are:
● More optimal dimensioning of the Motor Module or Power Modules
● Certain motor types are operated with a more favorable pulse frequency
● Motor Modules of different sizes can be operated with different pulse frequencies
● Faster sampling times can be set for DCC and free function blocks
● Faster setpoint transfers from a higher-level control system are possible
● Automatic commissioning routines with different current controller cycles are simplified
This function is enabled for Motor Modules and Power Modules in the chassis format in
vector control.
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Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions