Hello malolokiller,

at first welcome to the Forum. 

malolokiller

Good  I have an analog input, a photocell, which controls the voltage of an analog output. This analog output has to output 2 fixed voltages (5V and 10V) as ordered by the sensor.

The photocell is:  http://ergiocontroles.com/producto/sistema-de-seguridad-y-control/brahma-fc-8/

Is this possible? If yes, what would it be like?  Regards, thanks.

Not everyone in the form speaks Spanish, so the link is not very helpful for most.
I cannot see from your description what type of analog output the sensor is.
A photocell usually has no analog output.
Therefore we need more information from you.
Do you have a data sheet for the sensor? 

JKV JAMES

 

malolokiller

Good  I have an analog input, a photocell, which controls the voltage of an analog output. This analog output has to output 2 fixed voltages (5V and 10V) as ordered by the sensor.

The photocell is:  http://ergiocontroles.com/producto/sistema-de-seguridad-y-control/brahma-fc-8/

Is this possible? If yes, what would it be like?  Regards, thanks.

 

Yes.

Your input is analog flame detector with 4-20mA will give INT  raw value  0-27648 to PLC .

You can scale it to engineering value and generate alarm a set point.

Also Unscale for 5V OR 10V and connect to analog output .

You don't know LOGO!, right?

LOGO! analog inputs makes no INT values 0-27648. LOGO! inputs makes 0-1000 units.

sinamic.hr

Hi malolokiller,

I read 'bout your photocell. First of all it is 4-20mA sensor that you cannot read on LOGO! without AM2 module or connecting your sensor through an resistor of 500 ohm to LOGO!.
So you will get an 2-10 V signal from a 4-20 mA Sensor. You can wire it on I7 (=AI1) or I8 (=Ai2) on the LOGO! module, also check the hardware conf inside LOGO! 

For analog output just use Analog amplifier that will rescale your analog values from software to 0-1000.

Hope thi will be helpful for you.

SINAMIC Croatia 

Not all LOGO! base modules have analog inputs.

Only basic modules that can only work with DC voltage have analog inputs (0-10V).
Depending on the LOGO! two AI.
The current LOGO! If it has analog inputs, 0BA8 has 4 AIs (0-10V).
I1 = AI3, I2 = AI4, I7 = AI1, I8 = AI2.

No, I don't think so.

He has not yet specified a criterion when he wants to output 5V and when he wants to output 10V.
And if he wants to output voltage values, then he needs an AM2 AQ.

Are you sure that the photocell has an output of 4-20mA? I read the data sheet but I found no Information of this.

Edit:

Have you a data sheet or a manual of this sensor?

How must the sensor wired to?
To a analog input of a LOGO! base modul? Or to a AM2 extended modul?