phuz
Member
There was no great way to describe the behavior this temperature input is demonstrating, so I attached a video. It ramps, then hesitates, then ramps, etc. Obviously, this causes the loop to respond poorly. On an identical process, I have a much more linear temperature input and the loop is near perfect. The input is a Pyromation RTD with hockey puck (0-300F) going into a 5069-IF8. I have the card set for 20ms with 500ms averaging. There is a chart recorder in series with the 4-20mA loop and its digital display behavior mirrors that of the HMI, which tells me its in the signal and not the PLC. Is this a bad transmitter or what could cause this?
https://youtu.be/4JAxfW6PaYY
https://youtu.be/4JAxfW6PaYY
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