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Siemens alarm

25040 Standstill Monitoring

An axis that should be standing still moved outside its standstill tolerance.

Stops the machineSiemens SINUMERIK 840D sl, 828D and 840D powerline

What it means

An axis that should be standing still moved outside its standstill tolerance.

Common causes

  • Vertical axis brake or counterbalance problem
  • Mechanical slip
  • Drive or tuning problem

What to check first

  1. Note the axis
  2. Watch for drift at stop

Lock out the machine before reaching into it. Never bypass a door switch or interlock to clear an alarm.

When to call a repair tech

A tech should check brakes, couplings and tuning.

Repair companies that work on Siemens

See all Siemens repair

Quick answers

What does Siemens alarm 25040 mean?

An axis that should be standing still moved outside its standstill tolerance.

What causes Siemens alarm 25040?

Vertical axis brake or counterbalance problem. Mechanical slip. Drive or tuning problem.

How do I fix Siemens alarm 25040?

Note the axis. Watch for drift at stop. A tech should check brakes, couplings and tuning.

Alarm numbers and text can differ by control model, software version and machine builder. This page is a starting point from people who have worked on these machines, not a replacement for your machine builder's manual.

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