Error on a Siemens Simodrive 611 typically signifies a "Current controller output limited" or a "Contouring error" . This means the motor is drawing its maximum current but is unable to reach the set position or speed commanded by the control module. Common Causes

In many machines, the CNC controller (e.g., 840D) first pulls “controller enable” before “pulse enable”. Modify PLC program to ensure:

Follow this logical sequence to isolate the exact cause of Error 607 without replacing good parts unnecessarily. Step 1: Mechanical and Brake Verification Turn off the main machine power and lock out the system.

If you encounter this error, follow these steps in order of complexity: Step 1: Check External Connections

Encountering is a clear sign that your drive system is operating beyond its physical or electrical capacity. By systematically separating the mechanics from the motor, testing cable insulation, validating the DC link, and utilizing module swapping techniques, you can accurately identify the fault source.

Siemens SIMODRIVE 611 Error 607 is a classic “can’t start” fault that intimidates many due to its safety interlock nature. Yet, with a methodical approach starting at the 48V power supply and following the signal chain, it is one of the most solvable errors in the Siemens drive family.

If you are currently facing this issue on a machine, I can help you narrow down the diagnostic steps. Please let me know:

Step 1: Inspect the Mechanical SystemBefore swapping electronics, ensure the axis moves freely. Manually turn the ballscrew if possible (with power off and safety protocols followed). Check if the mechanical brake is receiving the proper 24V signal to release.

: Faulty encoders or damaged feedback cables can provide "noisy" or incorrect position data, leading to a perceived contouring error.

Faulty cables or a bad encoder providing "funny sounds" or incorrect position data. Drive/Control Module Failure:

Based on field service reports and Siemens technical documentation, the following are the most common root causes:

Based on Siemens documentation and field reports, Error 607 commonly correlates with one or more of the following:

Always follow lock-out/tag-out procedures when working on live drives. The DC link can retain lethal voltage for up to 10 minutes after power-off.

When Error 607 halts a machine tool, the fault generally originates from one of four critical failure points: 1. Physical Disconnection or Missing Phase

However—and this is critical—. The alarm logic is a symptom, not a diagnosis. The source of the overvoltage can be electrical (mains supply), mechanical (regenerative energy), or internal (component failure).

To minimize machine downtime, follow this step-by-step isolation protocol to pinpoint the exact origin of the 607 error. Step 1: Preliminary Safety Check