Siemens SINAMICS G110D Operating Instructions Manual page 173

Figure 7-2
Function
When the Repair switch is set to OFF, all power to the motor is terminated. The Inverter
pulses are disabled and the motor cannot be started or react in anyway to commands from
the Inverter or the controlling PLC. With the mains are isolated fault F0003 will be generated.
The Repair switch can be padlocked into position so that once it has been switched off, it
cannot be accidentally switched on.
The motor can be repaired or replaced as required. Once the Repair has been completed
the Repair switch can be unlocked and switched on - the motor is then directly under the
command of the Inverter or the controlling PLC.
It should be noted that although the motor is isolated, communications and commands can
be passed between the controlling PLC and the Inverter, for example, parameters can be
changed.
SINAMICS G110D
Operating Instructions, 2009-05-15, A5E02385577A AB
Repair switch
Service and maintenance
7.4 Repair switch
173