thanks for your help . I have a 4-20 ma sensor and I need to configure it so that when 50 m3 of water pass through, it activates a solenoid valve. I understand that it would be 700 l/ min, should that be the value to be configured in my analog amplifier? 2-42m3 / hr is the flow

Hello wams23, In Analog Amplifier block you can't Scale your value from 0 to 700 but the solution is this :

You need to Scale your analog value with mathematic Instruction block here is the Project Example.

Check it please.

If it was helpful, do not forget rating

I assume the sensor you are talking about is a flow meter.

To calculate volume (50m3) with a simple flow meter (m3/h) you need to be integrating the actual flow value, converted to per second (m3/s), like a totalizer.

For example if actual flow value given by the flow meter is 24m3/h, then you need to recalculate it to actual m3 per second (24/3600), which is 0.0066m3/s and that is the kind of value you need to be adding every second until you reach the desired limit. However, this could be difficult to do in Logo since it only supports integer values (-32768 to +32767), so five decimals max. I wouldn't use a Logo for this, but rather the cheapest s7-1200 with a signal board that can read current loop.