STOP A initiated

What does F01600 mean?

A STOP A request has been initiated, often due to a safety-related event such as defective hardware, incorrect STO configuration, or a discrepancy at STO terminals. This condition is indicated by fault value r0949 and results in an immediate, uncontrolled cessation of motor power. It is a critical fault impacting machine safety and operation.

• Failure of an external safety component connected to the STO circuit (e.g., emergency stop button, safety gate switch).
• Incorrect parameterization of Safety Integrated functions, specifically STO (Safe Torque Off), like P9501 not configured correctly for the application.
• Discrepancy detected between the two STO input channels (F-DI1 and F-DI2) indicating a potential wiring fault or internal hardware issue.
• Internal hardware defect within the Control Unit's safety monitoring circuitry.
• External safety relay output contacts (connected to F-DI1/F-DI2) opening asynchronously.

Click steps to track your progress.

1. 1

   Measure the voltage across STO input terminals (e.g., X124/1 and X124/2 for F-DI1, X124/3 and X124/4 for F-DI2) with a multimeter to verify an active "1" signal (24VDC) when STO is not active.

2. 2

   Verify the integrity of all external safety components in the STO circuit (e.g., E-stop buttons, safety light curtains) by actuating them and observing their electrical state.

3. 3

   Check the parameter P9501 (Safety Integrated function selection) to ensure STO is correctly enabled or disabled according to the system's safety concept.

4. 4

   Inspect the wiring for the STO input channels (e.g., terminals X124/1 through X124/4) for loose connections, insulation damage, or short circuits.

5. 5

   Execute a safety function test (e.g., using P9700=1 to reset) after verifying external safety circuit integrity and parameter settings.