Siemens 420 manual Analog input ADC, Analog output DAC

Issue 07/04 3 Functions

3.5.5.6Analog input (ADC)

P0757 =...	Value x1 of ADC scaling		0 V		P0761 > 0
					0 < P0758 < P0760				0 > P0758 > P0760
P0758 =...	Value y1 of ADC scaling		0.0 %			%
					100 %
	This parameter represents the								4000 h
	value of x1 as a % of P2000				max
	(reference frequency).
P0759 =...	Value x2 of ADC scaling		10 V		P0760
P0760 =...	Value y2 of ADC scaling 100.0 %
	This parameter represents the				P0758						V
	value of x2 as a % of P2000								P0757	10 V	x100%
	(reference frequency).									P0759
								P0761
P0761 =...	Width of ADC deadband		0 V						P0757 = P0761
	Defines width of deadband on					min
	analog input.
	ADC channel					P0757 P0758	P0759	P0760	r0754
	KL1
	+10 V		P0756	P0753					P0761
										P1000 = 2
	KL3								ADC
		A	ADC			ADC
											Setpoint
	KL4	D	type			scaling			dead
									zone
									r0752	P0704 = x
					1.7 V
				1							Function
				0	3.9 V			r0722
								r0722.3
3.5.5.7	Analog output (DAC)
P0771 =...	CI: DAC										21

Defines function of the 0 - 20 mA analog output.

P0773 =... Smooth time DAC 2 ms

Defines smoothing time [ms] for analog output signal. This parameter enables smoothing for DAC using a PT1 filter.

P0777 =...

Value x1 of DAC scaling

0.0 %

mA

P0778 =...

Value y1 of DAC scaling

0

20

P0780

P0779 =...

Value x2 of DAC scaling 100.0 %

y2

P0781

P0778

P0780 =...

Value y2 of DAC scaling

20

y1

P0781 =...

Width of DAC deadband

0

P0777

P0779

100 %

%

Sets width of deadband in [mA]

for analog output.

x1

x2

DAC channel

P0777

P0788

P0779

P0780

r0774

P0773

P0781

Function

r0xxx

P0771

DAC

DAC

D

xxx

scaling

dead

A

P0771 = xxx

zone

MICROMASTER 420	Operating Instructions
6SE6400-5AA00-0BP0	75