Essential Service Mode - Siemens SINAMICS G120 Original Instructions Manual

Setting functions
8.7 Application-specific functions
Note
If you use a temperature sensor as the input for the technology controller, you have to
modify the scaling of the analog input.
• Scaling example for LG-Ni1000:
0 °C (p0757) = 0% (p0758); 100 °C (p0759) = 100% (p0760)
• Scaling example for Pt1000:
0 °C (p0757) = 0% (p0758); 100 °C (p0759) = 80% (p0760)
Please refer to the parameter list for more details.
8.7.12

Essential service mode

In the Essential Service Mode (ESM), the motor must operate for as long as possible, for
example in the case of a fire, to keep the evacuation routes open by extracting smoke.
Contrary to normal operation, when faults develop, the inverter does not shut down, but
responds as follows
● Faults that do not immediately result in the destruction of the inverter or the motor:
The inverter ignores these faults, and continues to operate in the "essential service
mode"
● Faults/errors, which cannot be ignored, and demand a restart, for example software
errors:
The inverter automatically restarts and attempts to acknowledge the existing fault/error
using this function.
● Faults, which also cannot be resolved after a restart:
In this case, there is the option of activating the bypass function and to directly operate
the motor from the line supply.
Loss of warranty for an inverter operated in the essential service mode
If you activate the essential service mode, then all warranty claims are null and void with
reference to the inverter.
The essential service mode is an exceptional state, and is not suitable for continuous
operation.
Please note that the essential service mode can result in exceptionally high temperatures,
including open fire, as well as emissions of light, noise, particles, gases, etc. can occur
inside and outside the inverter.
The inverter logs the essential service mode, and the faults that occur while in essential
service mode in a password-protected memory. This data is only accessible for the service
and repair organization.
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WARNING
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG