January 2012 6.17 Monitoring Functions 973
Temperature
models
The temperature model of the motor or power module is defined by the
entries in the motor table or power module table, respectively (motor.mot,
motor.amp). Remember that calculation of which temperature model to use
depends exclusively on the availability or nonavailability of the parameters. In
addition, the parameters for motors and power modules are to be evaluated
separately.
These parameters are explained below using the respective temperature
model for the calculation.
Temperature
model, first order
The following values (entries in the motor table or power module table) are
required for the first-order temperature model to calculate the temperature.
F-DC [Hz]:
This parameter is not evaluated for the CC 422.
Lower limit frequency for the transition of traverse to standstill with the
CC 61xx and CC 424.
F-DC = 0 – Default value (0) is active
F-DC > 0 – Input value in Hz is active
T-DC [s]:
Thermal time constant for operation at standstill (not evaluated at present)
F-AC [Hz]:
Upper limit frequency for the transition from standstill to traverse.
F-AC = 0 – Default value (0) is active
F-AC > 0 – Input value in Hz is active
T-AC [s]:
Thermal time constant for the motor or power stage. Identifies the point in
the temperature curve at which 63 % of the maximum temperature is
reached.
T-AC = 0 – Default value: 10 s for axes, 150 s for ball screw
T-AC > 0 – Input value [s] for power modules. For motors, this input value is
active if Tth
2
= 0.
Only for motors Tth
2
[s]:
Thermal time constant for the motor. Identifies the point in the temperature
curve at which 63 % of the maximum temperature is reached.
Tth
2
= 0 – Default value: 10 s for axes, 150 s for ball screw
Tth
2
> 0 – Input value in [s] for motors
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