Error, no pick-up available
The error is triggered by the pick-up monitoring module if the amplitude of the rotary encoder tracking signals (sin/cos signals) is less than 5%. Sin/cos signals with an amplitude that is too small can lead to an incorrect actual position. In this case, rotation in positional synchronism is no longer possible. In the case of synchronous motors, malcommutation also results.
The amplitude of the sin/cos signals is measured by calculating the measured value "m” as follows:
m = sin^2 + cos^2.
The measured value “m” is displayed in parameter ID2362 "G-Mon measured value". For ideal sin/cos signals the measured value must always be constant, for real signals the measured value should lie within certain limits.
The error response time can be parameterised in parameter ID2366 "G-Ue response time". The higher the response time, the more robust the monitoring is against malfunctions, however the longer the switch-off time too in case of errors.
The error is fatal and leads to immediate shutoff of the drive controller. In this case the drive coasts to a standstill. Renewed release of the drive by the controller is prevented until the cause of the error has been corrected and the error has been acknowledged.
Source and Remedy
Rotary encoder lead defective. Check the rotary encoder cable and replace if necessary.
Rotary encoder connector at the rotary encoder or the M drive is loose or disconnected. Check plug-in connectors.
Rotary encoder defective. Replace rotary encoder.
Rotary encoder input of the rotary encoder evaluation (hardware) in the M drive is defective. Replace M Drive.