Essential Service Mode - Siemens Sinamics G120P Operating Instructions Manual

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[x]) = 0% (p0758[x]); 100° C (p0759[x]) = 100% (p0760[x])
• Scaling example for Pt1000:
0° C (p0757[x]) = 0% (p0758[x]); 80 % C (p0759[x]) = 100% (p0760[x])
Please refer to the parameter list as well as the 2252 and 2270 function block diagrams for
further details.
7.7.13

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 that cannot be ignored and require a restart:
the inverter automatically restarts and uses this function to try to acknowledge the
pending faults.
● 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.
Danger to life due to fire in essential service mode
In essential service mode, exceptionally high temperatures, including an open fire, as well
as emissions of light, noise, particles, gases, etc. can occur inside and outside the inverter.
Fire and smoke can cause death, severe injury or material damage.
• Use essential service mode only when the named restrictions are satisfied.
Note
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.
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
WARNING
7.7 Application-specific functions
Functions
401