
Activating safe-state mode
■ Switch off the bus voltage.
■ Press and hold the button at the bottom left and the button at the bottom right
(see figure 3), depending on the device version (1 … 4-gang).
■ Switch on the bus voltage.
The safe-state mode is activated. The operation LED flashes slowly (approx. 1
Hz).
Do not release the buttons until the operation LED flashes.
Deactivating safe-state mode
■ Switch off the voltage or carry out ETS programming.
6.2.2 Master reset
The master reset restores the basic device settings (physical address 15.15.255,
firmware remains in place). The device must then be recommissioned with the ETS.
In secure operation: A master reset deactivates device security. The device can then
be recommissioned with the device certificate.
If the device - for instance as a result of errors in the project design or during com-
missioning - does not work properly, the loaded application program can be deleted
from the device by performing a master reset. The master reset resets the device to
delivery state. Afterwards, the device can be put into operation again by program-
ming the physical address and application program.
Performing a master reset
Precondition: The safe-state mode is activated.
■ Press and hold the button at the top left and the button at the bottom right
(see figure 3) for more than five seconds until the operation LED flashes
quickly (approx. 4 Hz), depending on the device version (1 … 4-gang).
■ Release the buttons.
The device performs a master reset.
The device restarts. The operation LED flashes slowly.
Resetting the device to its default settings
Devices can be reset to factory settings with the ETS Service App. This function uses
the firmware contained in the device that was active at the time of delivery (delivered
state). Restoring the factory settings causes the devices to lose their physical ad-
dress and configuration.
Universal push-button module
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