Commissioning the
7.4 Drive data sets
F-TM ServoDrive
Equipment Manual, 02/2020, A5E47579503-AA
63
Thermal model
The motor can be protected from thermal overload. Take section Messages/monitoring
(Page 75) into consideration for this.
You define the thermal properties of the motor in the "Parameters" > "Drive" > "Thermal
model" area.
Brake module
The F-TM ServoDrive drive system has a brake chopper for connecting an external brake
resistor.
You need to enable and configure the brake chopper in the area "Parameters" > "Drive" >
"Brake module"
You activate the brake chopper under "Advanced functions".
Set the following values for the brake chopper:
● Chopper switch-on voltage
● Chopper switch-off voltage
● Heat transfer resistance of the brake resistance
● Time constant of the brake resistance
● Maximum temperature
● Ambient temperature
● Response to max. temperature
You can freely specify the switch-on and switch-off voltage of the brake chopper within
certain limits.
The specific values of the braking resistor, such as heat transfer resistance and time
constant, can be obtained from the manufacturer of the braking resistor (data sheet). Typical
values are stored as default values in the TIA Portal. The default values must be checked
and adjusted if necessary.
You use the maximum temperature to define the switch-off temperature for the resistor. The
switch-off temperature is calculated in a thermal model based on the ambient temperature.
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