PLC Communication to Computer

[TimWilborne]

Post your program real quick. You've got about 2 minutes before I walk out the door

 

[Gunther Garland]

The 24VDC is the problem.


Thank you for your help.

 

[TimWilborne]

Cool, good luck with you project

 

[Gunther Garland]

Turns out, the 24VDC is not the problem. We are using the internal power supply. There is still no signal from the analog output.

Any advice would be greatly appreciated.

 

[Gunther Garland]

We are now getting a signal, however it is half the value.
We are placing a 4-20mA signal using a fluke meter.

We believe that it is because of the progam or fault value(s) but we are not sure what values to change them to.

 

[jimbo3123]

We are now getting a signal, however it is half the value.
We are placing a 4-20mA signal using a fluke meter.

We believe that it is because of the progam or fault value(s) but we are not sure what values to change them to.

You are getting a signal that half the value of what?

If you are using 0 to 10V on your input card, and it is setup for raw/proportional, you should read a value of 0 to 31206 on the input data word.

If you have the input setup for 4-20mA, raw/proportional, you should read a value range of 6241 to 31206 on the input data word.

These all came from the manual that you can find here:
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1769-um002_-en-p.pdf