System Runtime / Operating Hours Counter - Siemens SINAMICS S120 Function Manual

Basic functions

8.18 System runtime / operating hours counter

8.18 System runtime / operating hours counter
Total system runtime
The total system runtime is displayed in p2114 (Control Unit). Index 0 indicates the system
runtime in milliseconds. After reaching 86,400,000 ms (24 hours), the value is reset. Index 1
indicates the system runtime in days. The counter value is saved when the power is switched
off.
After the drive unit has been switched on, the counter continues to run with the value stored
when the power was last switched off.
Relative system runtime
The relative system runtime after the last POWER ON is displayed in p0969 (Control Unit). The
value is specified in milliseconds. The counter runs over after 49 days.
Actual motor operating hours
The motor operating hours counter p0650 (drive) is started when the pulses are enabled. When
the pulse enable is withdrawn, the counter is stopped and the value saved.
If p0651 is at 0, the counter is deactivated. If the maintenance interval set in p0651 is reached,
alarm A01590 is triggered. Once the motor has been maintained, the maintenance interval
must be reset.
Note
If the motor data set is switched during the star/delta changeover without the motor being
changed, the two values in p0650 must be added to determine the correct number of motor
operating hours.
Operating hours counter/wear meter of the fan
The wear on fans can be shown in 2 ways:
● All fans
The operating hours of the fan in the power unit are displayed in p0251 (drive). The number
of hours operated can only be reset to 0 in this parameter (e.g. after a fan has been
replaced). The maximum operating period of the fan is entered in p0252 (drive). Alarm
A30042 is output 500 hours before this figure is reached.
● For fans as of firmware V5.1
The wear on the heat sink of the fan in the power module is displayed by a wear counter
r0277. The wear counter can be reset (e.g. after a fan replacement) via p0251 = 0.
Monitoring (wear counter and operating hours counter) is deactivated when p0252 = 0.
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Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Drive functions