Fixed Frequencies - Siemens SINAMICS G120 Operating Instructions Manual

8.8

Fixed frequencies

Data
Number:
Parameter range:
Warnings:
Faults:
Function chart number:
Description
The fixed frequency functionality allows to enter a setpoint to the drive. This is an alternative
option to enter a setpoint with using the analog inputs, the serial communication interfaces,
the JOG function or the motorized potentiometer. The fixed frequencies are defined using
parameters P1001 ... P1015 and selected and combined using binector inputs P1020 ...
P1023. The effective fixed frequency setpoint is available through connector output r1024. If
this is to be used as setpoint source, then parameter P1000 should be modified or connector
output r1024 should be connected to the main setpoint P1070 or supplementary setpoint
P1075.
There are two modes to select fixed frequencies, which are set via the parameter P1016:
● Direct selection (P1016 = 1)
● Binary-coded selection (P1016 = 2)
The fixed frequency status bit r1025 (binector output) allows to combine the two selection
modes for fixed frequencies with an ON command. For this, P0840 should be set to 1025.
Please note that the meaning of P0840 may change with using the 2-/3-wire control
functionality.
Direct selection (P1016 = 1)
In this particular mode, a control signal directly selects the fixed frequency. This control
signal is entered using the binector inputs P1020 ... P1023. For this selection a permanent
signal at the parameters P1020 ... P1023 is necessary. If several fixed frequencies are
simultaneously active, then the selected frequencies are added.
The control signal for selection of the fixed frequencies can be any binary output (BO)
parameter such as a serial communication interface or in most cases a digital input. When
selecting fixed frequencies with digital inputs, two connection methods are available:
● Standard method
● BICO method
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
Note
The standard method has priority over the BICO method.
15
P1001 ... P1025
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-
FP3200, FP3210
Functions
8.8 Fixed frequencies
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