1
Technical Description
22
CP 343−2 / CP 343−2 P AS−Interface Master
Release 08/2008
C79000−G8976−C149−04
1.6
Configuring using Buttons
Preparation for Button Configuration
Make sure that the following situation applies:
S
The PLC CPU must be switched to STOP.
S
The CP 343-2 and all AS-i slaves must be connected to the AS-interface and
supplied with power.
S
The AS-i slaves must have unique addresses other than “0”.
Setting the Configuration with Buttons
1. Check whether the CP 343-2 is in “configuration mode” (”CM” LED is lit).
If the ”CM” LED is not lit, change the CP 343-2 to the configuration mode with
the “SET” button.
2. Check whether all the slaves connected to the AS-interface exist and are
displayed.
3. Press the SET button. This configures the CP 343-2; in other words, the
detected actual configuration is stored as the default in the non-volatile
EEPROM. At the same time, the CP 343-2 is changed to the protected mode;
the “CM” LED goes off. (See Section 1.5 > SET button)
The “CER” LED also goes off since following configuration, the “expected
configuration” stored on the CP 343-2 matches the “actual configuration” on the
AS-Interface.
Note
Changing from the configuration mode to the protected mode is only possible
when there is no AS-i slave with address 0 connected to the AS-Interface. If a
slave 0 is connected, the “SF” LED lights up when the SET button is pressed.
If you run a button configuration when there is no AS-i power supply (APF state) or
when no AS-i slaves are connected, all the internal lists are set to their default
values. In particular, all the AS-i parameters are set to = F
Hex
and the
AutoAddress_Enable bit is set to = 1.
Notice
The following applies to the CP 3 43-2 P: A configuration of the AS-i slaves set by
STEP 7 and downloaded to the S7 station is transferred to the CP 3 43-2 P by the
CPU during startup. Any configuration set with the buttons is then overwritten.
