Siemens 420 manual Fixed frequencies FF, Direct selection

Issue 07/04 3 Functions

3.8Fixed 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

			DIN3	DIN2	DIN1
FF0		0 Hz	0	0	0
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

MICROMASTER 420	Operating Instructions
6SE6400-5AA00-0BP0	99