Hi I am using Twidosuite for Schneider Electric TWDLMDA20DRT base controller.
Some problems with the rungs as I am still beginner and been trying hard to get the answer.
I have a cold water and hot water system running at the same time.
For best comfort, hot water is injected at 20% of cold water.
In other words, Hotwater = 0.2 Coldwater
However, when the cold water flow increase by 50%, the hot water has to increase too. BUT, with a lag time of 10 min, in order not to stress the pump and sth else blah blah blah.
For example, at 13:15, cold water is at 10 litres/min, and hot water is at 2 litres/min.
But at 13:16, the cold water increase to 18 litres/min, so hot water has to increase to 3.6 litres/min.
But the increase of flow for the hot water can only starts 10 minutes later, which is at 13:26.
If given a stipulated or scheduled time everyday, it will be easy.
However, the increase of cold water flow may be sudden any time and hence I am clueless on how to derive a PLC rung for such circumstances.
Any help? Thanks.
Some problems with the rungs as I am still beginner and been trying hard to get the answer.
I have a cold water and hot water system running at the same time.
For best comfort, hot water is injected at 20% of cold water.
In other words, Hotwater = 0.2 Coldwater
However, when the cold water flow increase by 50%, the hot water has to increase too. BUT, with a lag time of 10 min, in order not to stress the pump and sth else blah blah blah.
For example, at 13:15, cold water is at 10 litres/min, and hot water is at 2 litres/min.
But at 13:16, the cold water increase to 18 litres/min, so hot water has to increase to 3.6 litres/min.
But the increase of flow for the hot water can only starts 10 minutes later, which is at 13:26.
If given a stipulated or scheduled time everyday, it will be easy.
However, the increase of cold water flow may be sudden any time and hence I am clueless on how to derive a PLC rung for such circumstances.
Any help? Thanks.