Temperature Monitoring - HEIDENHAIN iTNC 530 Service Manual

9.3.7 Temperature Monitoring

Temperature of the The internal temperature of the MC 42x(B) is continuously monitored. At approx. 55° C the
MC 42x(B) temperature warning TNC temperature warning appears. If the temperature does not fall below
55° C any more, the warning is reactivated after two minutes. Beginning at about 60° C the error
message TNC temperature too high <Temperature> °C is displayed and an emergency stop
generated. If the temperature does not fall below 60 °C when the machine is switched on again,
the error message reappears after 10 to 20 seconds.
Motor temperature To measure the motor temperature, a KTY 84 must be connected at pins 13 and 25 of X15 to
X20, X80 to X83. The temperature value is ascertained at least once per second. The maximum
permissible motor temperature is taken from the motor table.
As soon as the given temperature is exceeded, the blinking error message: MOTOR TEMPERA-
TURE <AXIS>TOO HIGH appears and the drives are automatically switched off.
Heat sink At X51 to X60 the temperature warning signal is available at pin 10.
temperature of
If the permissible temperature of the heat sink on the power module is exceeded, this signal is
the power module
reset.
The TEMPERATURE WARNING signal is not evaluated in the NC. This information is made
available via the modules 9610 or 9066.

Possible No claim for completeness; contact your machine manufacturer!
Causes of Error If possible, write your own experience!
May 2006
Caution
Entries in the motor table must not be changed!
When a temperature warning is generated, the PLC program of the machine tool builder
immediately must bring the drives to a standstill; otherwise the power modules would be
destroyed.
Contaminated filter pads
Defective climate control unit in the electrical cabinet
Defective fan
Unfavorable mounting of components
Defective temperature sensor
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