Pixsys Forum

Good morning,
I used an ATR243 which passed away and I've replaced it with ATR244-23BC-T.
Now I have to re-programm it.
So, I measure the pressure with an P/I converter (4-20 mA)- TRAFAG 8472.78.5917 and I command 2 pumps to keep the pressure between 3 and 3.7 bar, using Q1 (NO) output
Can you tell me which parameters to modify in order to start the pump at 1.2 bar, run until 3.7 bar and if the pressure decrease under 3 bar to start again.
I also want the current pressure tobe displayed on first line and maximum pressure (3.7) to be displayed on second line.

Thank you in advance.

Good morning,
can define a threshold (setpoint) and a hysteresis. Below the setpoint the controller will be in NO, while above the set threshold + hysteresis the controller will be in NC.

Parameters:

38.[Act1]="cool" --> regulation type
39.[c.Hy.1]="0.7" --> histeresis

Setpoint = 3.0 bar

over the 3.7bar the relay will be close (sepoint + histeresis)
under the 3.0 (setpoint) the relay will be open.

Best Regards.