X20 system modules • Motor controllers • X20MM3332
1938
X20 system User's Manual 3.10
4.25.3.12 Monitoring the module supply
The module supply is continually monitored. If the supply voltage drops below 18V, all channels are switched off
and an error bit is set.
Information:
The undervoltage must be present for longer than 250 ms, before all channels are switched off. Power
dips can occur when starting motors or capacitive loads!
4.25.3.13 Monitoring the module current
The module current is continually monitored. If an overcurrent occurs, the respective channel is switched off and
an error bit is set.
Information:
The overcurrent must be present for longer than 250 ms, before the channel is switched off. High
starting currents occur when starting motors or capacitive loads!
4.25.3.14 Channel monitoring
After each switching process, the status inputs are checked with a 2 ms delay to ensure they are correct. This is
done so that faulty status signals are not generated when switching motors or capacitive loads.
If the status of the output does not correspond to the status that is expected (e.g. short circuit or motor spin-out),
a warning bit is set.
Information:
When channel monitoring is triggered, a warning is given. The output remains switched even if there
is a short circuit and is cycled to the output by the internal protective circuit.
If the motor is still spinning out, the voltage drops slowly. That means the warning bit StatusDigitalOut-
put can show a warning while the motor is spinning out.
If the motor is moved externally, voltage is induced into the module, which results in StatusDigitalOut-
put being set and the red LED being lit (warning).
4.25.3.15 Overtemperature cutoff (at 85°C)
If the module temperature reaches or exceeds the limit value of 85°C, then the module executes the following
actions:
•
Setting the "overtemperature" error bit
•
The outputs are switched off (short-circuited)
As soon as the temperature sinks back down below 85°C, the error must be acknowledged with Overtempera-
tureAcknowledge so that the channels can be switched on again.
Summary of Contents for X20 System
Page 2: ......
