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Goals and Symptoms
Machine worked well with ATV16. But when replaced by ATV28, no run signal received from controller. Controller is open collector output with 24V supply from the ATV. Controller operating sequence is, during initialisation, send a 200mS run signal to the ATV and read the motor encorder for motion. For ATV28 case, there is no run signal at all. Thus the controller detect a encorder feedback error. Could this be due to the ATV28 emit higher level of noise on the 24V supply, thus interfere with the controller operation? Can ATV58 or ATV11 improve the situation? The ATV28 works well when tested independly.
Facts and Changes
Replace ATV16U41M2 by ATV28HU41M2. Spray painting maching,
Causes and Fixes
Try to connect the Ov of ATV28 control terminals to the ground. We are very interesting by your problem, is it possible to make some oscillograms of the noise.
You can also try to use an external 24v supply. Try to use a core on the encoder cable.
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