Good morning,

I use a program to vary the speed of a fan (controlled by an ATV12 altivar) using a PT1000 probe.this one works perfectly.

I would like to add a command for a circuit breaker, once the machine door is opened the fan stops.once the door is closed the program resumes its normal course.

I would also like to add a two speed switch.To be able to turn the fan once outside the program temperature ranges.

I can't program these two functions.Can you help me?

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Split from 6ED1052-1MD08-0BA1/Pt1000.

Hello, do you have a start of a solution to propose?

For information, I changed the position of terminal C of the two-speed switch on L1 of the LOGO Power.

For an unknown reason, I cannot upload the PDF.

Waiting for your response.

Have a nice day

I realized my mistake early enough for terminal C it is now connected to the LOGO power module.

This is a NO switch.

Regarding the speed switch.1=25hertz, 0=0hertz, 2=50hertz..

I hope I haven't given you the information you need.

When the door is closed is the switch closed.

The condition is that the speed switch can only be activated when we are in values ​​lower or higher than the minimum and maximum limits of the thresholds.

All this information was in my first post.Except for the commentator's speed frequencies.I'm sorry this wasn't technical enough for you.I use google translate, this probably doesn't help us communicate either.

The maximum value is indeed that of threshold B005.the maximum value of B009 is necessarily identical to that of threshold B005.

Current temperatures are test values, I would change them based on actual conditions.The max value will logically be the maximum value of the AM2RTD module, namely 200°C.

The idea is to be able to manually start ventilation in the event of overheating.

Yes I understand the difficulty.

This involves the use of ventilation for a wood stove.

I want to use ventilation in several ways.

The first is automated.

Ventilation will start from threshold B002, and adapt according to the stove temperature, passing through B003 and B004 up to threshold B005.

This is the part of the program that works.

The second is manual, with the 3-position switch.It takes place in two stages.

1) in summer, to turn the fan when there is no fire (to cool the house).

2) in winter, if the temperature measured by the PT1000 probe exceeds 200°C, the ventilation no longer operates automatically, since the AM2RTD module is limited to this value.The stove will therefore overheat, you will have to start the ventilation manually.

This is an emergency situation which I hope will never happen.

This is the part I can't program

Did I manage to be clearer?

I'm not sure.

If I understand correctly, the current values ​​are the problem.

I used them to test the program with hot water...

The actual values ​​should be this.

Is this better for you?

If I understand correctly, once 180°C (1000 units) is reached, even if we exceed 200°C the value remains at 1000 units and the fan does not stop.

However, in my tests, I had to set B005 to 100°C because if the water was too hot, the fan would no longer turn.

If, as you say, there is no interest.There's probably something I'm missing.

And is it still possible to operate it in the "summer" condition, with temperatures lower than the starting values?

Exact!

It works as you say.

It's a shame that communication is so laborious.

This mystery solved.

Is what I want to do possible?Namely, stopping the fan when the door is opened, and adding the speed switch?

When I test the program with the door button or with the speed switch, the LOGO makes a sound which is really not reassuring and the motor does not turn.

Can you confirm my connection?

Door button: one terminal on the LOGO power supply the other on I1.

Speed ​​switch: terminal C on LOGO power supply terminal 1 on I2 terminal 2 on I3.

Pfff, I'm an ***.I mixed up the entrance and exit, sorry.

Fortunately, Siemens products are quality products! Itested the terminals and they all work.Phew!

Your program works in terms of managing thresholds and door swich. It doesn't work for speed switch.

In the attached program, nothing works in terms of threshold management and door swich, but the speed switch works.

While from what I see, in both cases the simulations are good...

To modify the temperature thresholds, are these thresholds B002, B003, B004, B005, B009?

Correct or almost.

Below 20°C the fan runs at 10Hertz.

Speed ​​switch works.

Position 1;30Hertz instead of 25.

Position 2;50Hertz is OK.

Sorry it took so long.