Proceed as follows to restore the PLC to the factory settings:
1. Switch on the NCU or press the reset button if the NCU has already been switched on.
The NCU is restarted.
2. Wait until the ERR LEDs flash orange.
3. Set the PLC mode switch to the MRES position until the ERR LED goes dark.
4. Then release the PLC mode switch and immediately turn it back to the MRES position.
The RUN LED flashes orange at a higher frequency.
5. Release the toggle switch.
The PLC is then reset to the factory settings.
Additional information
Additional information about the positions of the NCK commissioning switch can be found
under:
● CNC Commissioning Manual Part 1 (NCK, PLC, drive)
3.4.5 RESET button
Arrangement
The RESET button is located behind the service cover.
Performing a reset operation
The reset operation resets the NCU and forces a new ramp-up. It is similar to a "Power On
Reset" except that the 24 V power supply does not have to be switched off.
3.5 Dual fan module
Functions of the dual fan module
The dual fan module cools the CPU with two redundant fans.
The temperature inside the NCU and the correct functioning of the fan are monitored. Fan faults
are displayed and can be read out by means of the diagnostic buffer.
● Fan alarm ⇒ alarm 2110 "NCK temperature alarm": If one of the two fans no longer rotates
or the speed is out of tolerance.
● Fan fault ⇒ alarm 2120 "NCK fan alarm type %1": When none of the fans turn.
If the software does not respond within approx. 1 minute, the components are shut down
automatically.
You can find more information on the alarms in the Diagnostics Manual.
Description
3.5 Dual fan module
NCU 1760
34 Equipment Manual, 02/2020, A5E45627861B AB
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