Siemens · SINAMICS G120
An internal communication failure between the inverter's power module and control unit has occurred, indicated by an ASIC timeout. This can be caused by loose connections, electromagnetic interference (EMC), or a faulty internal component, leading to a loss of control and drive shutdown, impacting operational reliability.
Click steps to track your progress.
De-energize the drive and ensure the control unit is securely seated and locked into the power module chassis.
Carefully inspect and re-seat all internal ribbon cables (e.g., between CU and PM) for firm connection and no visible damage.
Check the drive's grounding connections (e.g., main PE terminal) to ensure effective EMI suppression.
Measure the auxiliary power supply voltages (e.g., 24VDC, 5VDC) on the control unit for stability and correct levels.
Isolate the drive from potential external EMI sources by checking cable routing and shielding integrity.