Troubleshooting

The following table shows a selection of possible problems and solutions.

Problem	Possible reasons	Possible solutions
The motor is not turning.	The motor channel was blocked due to a fault.	1. Check whether a diagnostic bit reports an error. 2. Set "Enable" to 0. 3. Eliminate the error. 4. Acknowledge the error. See chapter Acknowledging errors.
	The motor channel is disabled.	Set the variable "Enable" of the corresponding motor channel to 1.
	The variable "Velocity" is smaller than the parameter "Start velocity".	Increase "Velocity" or decrease parameter 80n00:09_hex "Start velocity".
The motor does not react to changes in the output variable "Velocity". It rotates at a constant speed.	The speed controller is disabled because the proportional component is zero.	Set the parameter 80n3:12_hex "Velocity loop proportional gain" to a value greater than zero.
Unexplained failure of an EP7402 or other device powered from the same supply voltage.	Overvoltages on the supply voltage U_P, caused by energy recovery, e.g. in the following events: Braking operations Manual movement of objects on the conveyor roller	Use a brake chopper to prevent overvoltages on the supply voltage U_P.

Further Information