Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 300502

Siemens 300502 - Axis drive maximum current monitoring of phase current R

The phase current R is greater than or equal to 1.05 times the maximum power section current MD 1107: $MD_INVERTER_MAX_CURRENT (transistor limit current) Control reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

300502

Siemens 300502 - Axis drive maximum current monitoring of phase current R

Axis drive maximum current monitoring of phase current R

The phase current R is greater than or equal to 1.05 times the maximum power section current MD 1107: $MD_INVERTER_MAX_CURRENT (transistor limit current) Control reaction: Mode group not ready. The NC switches to follow-up mode. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm. Channel not ready.

Safety

  • Drive/power/encoder circuit: hazardous voltages may remain in the DC link after power-off. Lock out / tag out, wait for discharge per the drive documentation, and use qualified personnel only.

Common Causes

  • The phase current R is greater than or equal to 1.05 times the maximum power section current MD 1107: $MD_INVERTER_MAX_CURRENT (transistor limit current)

Troubleshooting Steps

  1. 1Please inform the authorized personnel/service department.
  2. 2Check max. power section current in MD 1107 $MD_INVERTER_MAX_CURRENT (transistor limit current) - Check the motor data (motor code) - Motor has ground or winding fault - Check the controller data - Check the power section and motor terminals (including motor protection) - Error in actual current measurement (if necessary, replace 611D power section or controller module)
  3. 3Switch control OFF - ON

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.