Siemens MICROMASTER 420, Operating Instructions Manual

Page: 99 / 190

Issue 07/04 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
99
3.8 Fixed frequencies (FF)
Number: 8
Parameter range:
P1001 – r1024
Warnings -
Faults -
Function chart number: FP3200, FP3310
A setpoint can be entered via the analog input, the serial communication
interfaces, the JOG function, the motorized potentiometer as well as also using
fixed frequencies. The fixed frequencies are defined using parameters P1001 –
P1007 and selected via binector inputs P1020 – P1022. The effective fixed
frequency setpoint is available via connector output r1024 which means that it can
be connected further. If this is to be used as setpoint source, then either parameter
P1000 or P0719 should be modified or BICO parameter r1024 should be
connected to the main setpoint P1070 or supplementary setpoint P1075. Contrary
to parameter P0719, when parameter P1000 is modified, this implicitly changes
BICO parameters P1070, P1075.
Example: Fixed frequencies as setpoint source
a) Standard method
→
P1000 = 3
b) BICO method
→
P1070 = 1024, P1075 = 0
3 methods are available when selecting the fixed frequencies.
Direct selection
In this particular mode, the control signal directly selects the fixed frequency. This
control signal is entered via the binector inputs. If several fixed frequencies are
simultaneously active, then the selected frequencies are added.
Table 3-14 Example for direct coding via digital inputs
FF1 P1001 0 0 1
FF2 P1002 0 1 0
FF3 P1003 1 0 0
FF1+FF2 0 1 1
… …
FF1+FF2+FF3 1 1 1
DIN3 DIN2 DIN1
FF0 0 Hz 0 0 0