Sinumerik Alarm 300504 Axis %1 drive %2 measuring circuit error of motor measuring system
Parameters:
%1 = NC axis number
%2 = Drive number
Definitions:
Signal level of the motor encoder too low or disturbed.
Reactions:
– Mode group not ready.
– Channel not ready.
– Channel not ready.
– NC Start disable in this channel.
– NC Stop on alarm.
– The NC switches to follow-up mode.
– Alarm display.
– Interface signals are set.
Remedy:
Please inform the authorized personnel/service department.
• Check encoders, encoder lines and connectors between drive motor and 611D module.
• Check for temporary interruptions (loose contact) caused, for example, by movements in trailing cable.
• Check the shield connection of the front plate of the closed-loop control module (top screw).
• Use original, preassembled encoder cable from Siemens (high degree of shielding).
• If necessary, replace the motor, encoder and/or cables.
• With linear motor, check the signal level; possibly, the measuring scale of the open measuring system is polluted.
• For a gearwheel encoder, check the distance between the gearwheel and the sensor. Replace the sensor or the defective gearwheel.
• Replace the control module.
• Check the metallized intermediate circuit cover.
Program Continuation:
Switch control OFF – ON.
References
- Siemens Diagnostics Guide by Siemens