Siemens SINAMICS G120XA - Activating and Terminating Essential Service Mode; Essential Service Mode

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
6.8.4 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:
● If the motor was switched off by activating essential service mode, the converter switches
the motor on. The speed setpoint is die "ESM setpoint source".
● If the motor was switched on by activating essential service mode, the converter switches
the speed setpoint to "ESM setpoint source".
Signal p3880 = 0 deactivates the essential service mode:
● If one of the OFF1, OFF2 or OFF3 commands is active, the converter switches off the motor.
● If neither OFF1, OFF2 nor OFF3 is active, the converter switches the speed setpoint from
the "ESM setpoint source" to the normal setpoint source.
Switch the motor on and off during active essential service mode via other signals
The OFF1, OFF2 and OFF3 commands for switching off the motor have no effect.
Advanced commissioning
6.8 Drive availability
SINAMICS G120XA converter
324 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB