ni-switch close or open relay with a 1 or 0 input

[casio]

I am trying to open and close relays on pxi-2503 with ni-switch using a 0 or a 1 input into the relay action node. I am trying to replace the constant open/close control with a 0 or 1. The digital input is 20 and 21 respectively, those intergers do control the relay. How can I change those values to a 0 and 1. I deleted the open/close control from the driver itself and connected a constant integer into the driver node I32. I made the mistake of saving it. Now the relay returns an error as the sink being void and all relays now have a broken wire and no input control. I tried undoing it and wiring the original control (open/close) to the I32 input. It continues to error. I am noe re-installing the ni-switch drivers. All I need is a solution to get the relay to accept 1 or 0 for the relay control.

[.aCe.]

Please post a snippet of what you are trying to acheive. I am not sure what relay action node is!

Have you tried using a case structure to do this. I know this is not what you are looking for, but you could take some pointers from the snippet below:

Hope this helps.

[casio]

I will try to reload the NI-Switch drivers. My goal is to control the relays using binary values as I have range of capacitance load measurements to collect. I thought if I can make the capacitors binary weighted, Ex. 1,2,4,8,16, etc. it would be easier to implement, but I cannot get the relays to accept a 1 or 0 to control the action(open/close). I've attached my broken relay screen shots.

Sincerely,

Martin

[Andy-K · Accepted solution]

Hi Martin,

Working from the example VI you do not need to change anything with the Relay Control VI.  All you have to do is input a 20 to open the relay or a 21 to close the relay.  If you are working from 0 to close and 1 to open you can have it set up so that you subtract the control from 21.  That way if your control is giving a 0 value you get 21-0=21 going into the Relay Control VI which will close the relay.  If you have a value of 1 from the control you will get 21-1=20 going to the Relay Control which will open the relay.

[casio]

Thanks Andy,

That is what I had figured out after I got the driver problem ironed out. I right clicked the enumerated constant for the relay action input and selected the edit items option, I was able to change the 20 and 21 value for the constant to 0 and 1. Even though it accepted the changes, it would only accept 20 and 21. Basically i did what you did just a tad different. Here are a couple options: