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B8976111/02
2.1.4.4 Meaning of theSET/DISPLAY Button
The SET/DISPLAY button is used to change to the next display and to switch between the
configuration mode and the protected mode.
Pressing the SET/DISPLAY button briefly (less than 5 seconds) changes the display.
±
Pressing the SET/DISPLAY button for longer than 5 seconds changes the module from the
±
configuration mode to the protected mode and vice-versa (see 2.1.4.6).
The SET/DISPLAY button is to the left of the AS-i connector and is protected by a screw-on cover.
Access to the button is only possible when the cover is removed. After using the button, make sure
that you replace the cover again, otherwise the degree of protection is not guaranteed. The button is
in a recess to prevent it being pressed accidentally. It can be pressed using a ball-point pen or a
similar thin blunt instrument.
2.1.4.5 Slots Permitted for the CP 142-2 in the ET 200X Distributed I/O Station
The CP 142-2 can be operated in any slot in the ET 200X distributed I/O station.
The number of CP 142-2 modules that can be operated at the same time in the ET 200X distributed
I/O station depends on the basic module being used:
With the BM141 and BM142 basic modules, you can operate a maximum of six CP 142-2
±
modules at the same time.
With the basic module BM147, you can operate a maximum of seven CP 142-2 modules at the
±
same time.
2.1.4.6 Configuring the AS-Interface with the SET/DISPLAY Button
Recognizing the display state
The CP 142-2 distinguishes between two operating modes on the AS-Interface:
Configuration mode ("CM" LED lit)
±
Protected mode ("CM" LED not lit)
±
If you press the SET/DISPLAY button for more than 5 seconds, you trigger a mode change. After
approximately 5 seconds, the three LEDs of the group display start to flash. The mode changes when
you release the button.
2-9
AS-i Master Module CP 142-2
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