5
05.01
5.3 Resolver control with standard and analog interface 6SN1118–0B_11–0AA0
5-113
Siemens AG 2001 All rights reserved
SIMODRIVE 611 Planning Guide (PJU) – 05.01 Edition
Evaluation, motor PTC thermistor for temperature monitoring
The SIMODRIVE 611 feed modules with control for 1FT6 and 1FK6 servomo-
tors with resolver, have an evaluation circuit for the PTC resistor integrated in
the motor winding.
The motors should be protected from inadmissibly high winding temperatures
using the monitoring combination (trigger temperature 150°C).
As the drive shouldn’t unpredictably intervene in the cutting process, when the
response temperature is reached, this is only signaled to the SIMODRIVE 611,
centrally via terminals 5.1, 5.2, and 5.3 of the rectifier module.
There is no internal system shutdown function to protect the motor. The user
must ensure that the motor can thermally recover immediately after the
temperature signal is output, by appropriately designing the adaptation
control. It may be necessary to shut down the motor immediately.
A delay time is not permissible.
If the motor is not thermally monitored, then the complete drive could be
destroyed if an overload condition occurs, or if the drive converter was
over–dimensioned.
5 Control Modules
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