Power End Stage; Intermediate Circuit Voltage - Siemens SIMATIC ET 200SP F-TM Equipment Manual

7.7.3

Power end stage

Thermal monitoring of power end stage
The power end stage is monitored with a temperature sensor. You can specify the warning
threshold (p0291[1]) relative to the shutdown threshold "System maximum temperature
power end stage".
Procedure
1. Open the "Power end stage" area in the context of the drive under "Parameters" >
"Messages/monitoring".
2. Configure the warning threshold p0291[1].
Besides the temperature monitoring, the current load is also monitored. The current load of
the power unit is decisive for the temperature rise. The relative load of the power end stage
is calculated based on the square of the output current according to the I
Automatic overload limiting
The load of the power end stage is automatically limited by the drive.
With automatic overload limiting, the output current is automatically reduced on reaching the
rated load of the power end stage to effectively prevent an overload of the power unit.
Note
Overload capability of the power unit
Operation with a peak current of 10 A is possible temporarily if the average RMS value of the
output current does not exceed the rated current of the power unit up to 5 A.
7.7.4

Intermediate circuit voltage

Monitoring of the intermediate circuit voltage
The energy recovery in the power supply cannot be suppressed. Energy is fed back when
the drive brakes and the braking chopper is not connected and configured. The energy
recovery results in an increase of the intermediate circuit voltage.
You can set the limits for the intermediate circuit voltage within the permissible values.
If the limits are exceeded, the module switches off. Before the module is switched off, a
warning (limit - 5%) indicates that the limit has almost been exceeded. The user is
responsible for ensuring compliance with the permissible voltage limits.
F-TM ServoDrive
Equipment Manual, 02/2020, A5E47579503-AA
Commissioning the
7.7 Messages/monitoring
t method.
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