The SIMODRIVE 611 uses two voltage levels:
If the 48V supply drops below ~42V or is noisy, the drive cannot reliably activate the pulse enable. This is the single most common cause of Error 607.
Typical culprits:
The Siemens Simodrive 611 is a cornerstone of industrial motion control, powering countless CNC machines, milling centers, and robotic systems across the globe. Known for its robustness and modular design, it is not immune to faults. Among the various alarms that can bring production to a screeching halt, Error 607 is one of the most common—and often misunderstood. simodrive 611 error 607
If your machine control panel has just displayed “Fault 607” or “Alarm 607” on the Simodrive 611 power module, you are likely dealing with a critical drive malfunction. This article dissects every aspect of this error, from its root physical causes to step-by-step diagnostic procedures and proven repair strategies.
In Siemens terminology, Error 607 is a DC link overvoltage fault. It occurs when the internal DC bus voltage of the drive inverter rises above the maximum permissible threshold. Under normal operation, the rectifier converts AC mains input into DC voltage (typically around 600V DC for a 400V AC system). The drive’s internal logic monitors this voltage constantly.
When the voltage exceeds approximately 820-850V DC (depending on the specific module variant), the drive immediately triggers Error 607, shuts down the output stages to prevent damage to the IGBTs and capacitors, and displays the alarm. The SIMODRIVE 611 uses two voltage levels:
However—and this is critical—Error 607 rarely points to a single cause. 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).
Using a multimeter, check these terminals on the power module’s X111 connector (typically):
| Signal | Terminal | Normal state for enable | |--------|----------|--------------------------| | Pulse enable | 663 (NS1) - 664 (NS2) | Closed (0V across) | | Temperature OK | 9 – 10 | Closed (<10Ω) | | External fault | 13 – 14 | Closed | If the 48V supply drops below ~42V or
Pro tip: Jumper X111.663 to X111.664 temporarily (with extreme care) to test if the fault is external. Do not operate the machine – just test the interlock.
| Condition | Action | |-----------|--------| | 48V supply external – replace supply | Repair not needed – just PSU | | Power module works after jumper test | External wiring or PLC issue | | Error follows module after swap | Repair or replace module | | Burn marks, blown IGBTs | Replace module (repair costly) | | Intermittent error on one axis only | Replace drive – intermittent internal fault |
Many third-party shops (e.g., Artus, Radwell, Global Electronic Services) offer flat-rate repair for SIMODRIVE 611 modules ($500–$1500). Siemens also offers exchange service but typically more expensive.