Auxilary Input Losing State

Hi guys,

any help will be appreciated with this issue that is driving me crazy...

At a job site, we have a water tank that has 4 sensors; when water is sensed they provides us with a closed circuit, and when no water is sensed they provides us with an open circuit. I have wired these four sensors at an auxiliary input unit, set to on/off function, with the objective to have four virtual lights to show the tank's level.

The idea initially works and I get these 4 virtual lights to turn on, indicating that the tank is full which it is, but after a few hours the state of all group addresses goes back to Off.

Also I went a step further, and I assigned those Group addresses also to a relay output unit, but again the state is set back to Off which makes me to believe that for some reason the aux unit is the one that is changing the state by sending messages to the Bus network.

Any ideas.


Regards,

George

 

Can you post the block setup?

 

sorry for the delay

 

Hi guys,

can someone suggest something

 

Hey,

Do you have different group addresses on each of your channels/sensors? It is unclear in the screenshots as to it they are all the same GA or different. If they are the same I would suggest making each one a different address and seeing what happens then. It could be that one of the sensors is faulty and is going open circuit after a period of time or ect. How do you usually get them to turn on again after they have turned off? Have you also metered out the sensors before and after?

Because you have the inputs set to toggle I am presuming that the sensors pulse the input when the level changes? If it is a simple matter of when water reaches the sensor they are closed and when it goes away it is open you probably should be using Bell Press instead.

The other thing you could do is run diag utility or just open logging in PICED ect and actually make sure what messages are being sent around the time of the change..

 

Dear George,
jboer is absolutely right.
You should use 4 different GA's and Bell Press instead of On/Off function.

 

Yes, four different group addresses are used, just the name is too long to show...

I have tried Bell Press in the past, but with the same results; the state goes back to open (off), after a couple of hours.

We are using simple float switches, when there is water in the tank the circuit is closed and when there is not, the circuit is open.

I have even tried all of the above with a Bus Coupler, I guess the only thing left to do, is to try to figure it out via the logs...