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02.98
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Siemens AG 1998 All Rights reserved 6SN1197–0AA00 02.98 Edition
SIMODRIVE 611 (PJ)
The SIMODRIVE 611 feed modules with closed–loop control for the 1FT5 ser-
vomotors have an evaluation circuit, for the PTC thermistor integrated in the
motor winding.
The motors should be protected from inadmissibly high winding temperatures
with the monitoring combination (response temperature 150°C).
When the response temperature is reached, it is only signaled at the SIMO-
DRIVE 611 via an individual fault signal, terminals 289/294/296 and centrally via
terminals 5.1, 5.2 and 5.3 of the feed module as the drive should not intervene
directly in the machining process and disturb operation.
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.
Evaluation of the
motor PTC thermi-
stor for tempera-
ture monitoring
7.1.2 Interface overview, feed control, user–friendly interface
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