Posted on 21st November 2019
Siemens 611U fault, alarm E-A608 speed controller output limited.
The fault was diagnosed by swapping the power section (LT module) to another axis and the fault followed indicating a faulty LT module.
After replacing the 2x15A unit the machine was back in production.
Although the alarms are displayed on the 611U, a better description of the fault can be found by using SinucomU software which makes diagnosing route cause much easier.