Hey Group. I am a pretty inexperanced programmer who has only used basic programming language. I have never had a need before to use a analog input card or output card. The problem is I am now faced in my job with the need to control a prop. water valve with my plc. I have a valve that needs a 4-20ma signal to it. I have set the valve up so that 4 is closed and 20 is full open. It goes where it is told to with respects the the signal I send to it. I am not sure how to use the scale instruction. I am currently using rslogix for programming. I have a analog output card as well as an analog input card. I also have a flow meter that sends me a 4-20ma signal back to let me know how much water is going through the system. It is in slot one and the output analog card is in slot 2. I am confused with what adress to put in the scale instruction to coraspond to my hardwired input and output. Is my analog input and output adress as sinple as I:1/0 -
I:1/4 etc.? Is that the adress that goes into the scale instruction? Does it have to be a interger? Any help in explaing how to setup and use a 4-20ma in and out to control a valve would be very helpful.
Thanks,
Daymond
I:1/4 etc.? Is that the adress that goes into the scale instruction? Does it have to be a interger? Any help in explaing how to setup and use a 4-20ma in and out to control a valve would be very helpful.
Thanks,
Daymond