Reading temperature

[ebooker]

Hello:
I am using a GE Fanuc series 9030, I am trying to get it to accurately read temperature. The analog card is set up, and I do get a reading, after I use the rad_2_deg block, the readings are in the 30000, if I divide this by close to 10000 the value is close to room temp in C, It kind of follows the other temperature tester in the 0 to 100 C range being about 4 to 6 deg off, but onc over 100 the gap widens, then I start to get bogus readings around 200. This is the first program that I have written, so I know I have much to learn, I am just not sure what I am doing wrong

 

[BobB]

If my memory serves me correctly, you can set up automatic scaling for the input in the hardware setup area.

 

[Steve Bailey]

What is the part number of the module you're using to sense temperature? The thermocouple and RTD modules report the temperature in degrees C or degrees F or degrees times 10 (data value of 500 equals 50.0 degrees). If you're using a thermocouple module, is it configured for the type of thermocouple you're using?

Why are you using the RAD_2_DEG conversion function? That's for converting angular measurements from radians to degrees.

 

[oldgearhead]

I was always very satisfied with the 90-30 RTD input modules. My applications were usually PID control of very large open-flame gas burners operating in the 150F to 225F range in the Northern USA farm belt ambient range of temperatures (-20F to 100F). Ge's PID block is
nice also. If you require more than 4 analog inputs, you may find the GE multi-point 4-20ma modules, coupled with a quality RTD transmitter is the way to go.