Number Name Factory setting
p1245[D] Vdc_min controller, switch-on level (kinetic buffering) See parameter list
r1246 Vdc_min controller, switch-on level (kinetic buffering) - V
p1247[D] Vdc_min controller, dynamic factor (kinetic buffering) 300%
p1255[D] Vdc_min controller, time threshold 0 s
p1257[D] Vdc_min controller, speed threshold 50 rpm
6.9.4 Essential service mode
Overview
In essential service mode (ESM), the converter attempts to operate the motor for as long as
possible despite irregular ambient conditions.
The converter logs the essential service mode and any faults that occur during essential service
mode. The log is accessible only for the service and repair organization.
Note
Warranty is lost in the essential service mode
When the essential service mode is active, and faults occur in the converter , all warranty claims
associated with the converter become null and void. The faults can have the following causes:
● Exceptionally high temperatures inside and outside the converter
● Open fire inside and outside the converter
● Emissions of light, noise, particles or gases
Function description
Activating and terminating essential service mode
Signal p3880 = 1 activates the essential service mode.
Signal p3880 = 0 deactivates the essential service mode.
Switching the motor on and off during active essential service mode
The OFF1, OFF2 and OFF3 commands for switching off the motor have no effect.
The converter blocks all functions that switch off the motor to save energy, e.g. PROFIenergy
or hibernation mode.
Advanced commissioning
6.9 Drive availability
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 429
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