Siemens SIMATIC NET CP 343-2 Manual page 133

Deactivating the voltage monitoring (only on 6GK7 343-2AH01-0XA0 and 6GK7 343-2AH11-0XA0,
product version 02):
Step
1: Install the CP as described in Section 2.2.
2: Switch the power supply to the SIMATIC station off and
then on again.
3: Check the status of the voltage monitoring by reading the
LED display.
4: Press and hold down the "SET" button (for at least 5 s)
until the LED "APF" flashes.
Note:
This action is only possible within 30 s of switching on the
SIMATIC station.
5: Release the "SET" button.
6: Press the "SET" button briefly (several times if
necessary).
7: Press and hold down the "SET" button (for at least 5 s)
until the LED "APF" goes out.
Observe the information in the safety notices underneath
this table.
8: Transition to normal operation
Deactivating the voltage monitoring
CP 343-2/CP 343-2 P AS-Interface Master for SIMATIC S7
Supplement to Operating Manual, 08/2010, A5E03006584020A-01
1.10 AS-Interface operation with 24 V voltage (AS-i Power24V)
Meaning
The CP performs a self-test when it powers up. All the LEDs
on the CP light up while it is powering up. Then the LEDs go
out.
There are two different cases:
Voltage monitoring is activated (setting in delivery state):

The LEDs immediately indicate the operating state
described in Section 1.5
Voltage monitoring is deactivated (for AS-i Power24V

operation): The two LEDs "APF" and "0" flash for about
2 s, the LEDs then display the operating state described
in Section 1.5.
Pushbutton actuation detected. The device is in setting
mode.
The LED "APF" flashes.
Voltage monitoring status display:
LED "1" lights up: Voltage monitoring is activated

(setting in delivery state)
LED "0" lights up: Voltage monitoring is deactivated

(AS-i Power24V operation).
The LED "APF" flashes.
Voltage monitoring switchover:
LED "1" lights up: Voltage monitoring is activated

LED "0" lights up: Voltage monitoring is deactivated.

The setting of the voltage monitoring has been stored in
non-volatile memory in the CP.
Meaning of the displays and operator controls: Analogous to
Section 1.5.
Technical description
7