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Note
Changing from the configuration mode to the protected mode is only possible
when there is no 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.
Preparing to Configure
Make sure that the following situation applies:
The S7-22x CPU must be set to STOP (PLC_RUN=0).
The CP 243-2 and all AS-i slaves must be connected to the AS-Interface and
supplied with power by the AS-i power supply.
Configuring
1. Press the DISPLAY button to set the CP 243-2 display to the "status display"
mode (initial status).
2. Check whether the CP 243-2 is in the "configuration mode". ("CM" LED lit ). If
not, change the CP 243-2 to the configuration mode using the SET button.
3. By changing to the slave display with the DISPLAY button, you can check
whether all the slaves connected to the AS-Interface exist.
4. Press the SET button. The CP 243-2 is configured.
At the same time, the CP 243-2 is changed to the protected mode; the "CM"
LED goes off.
The "CER" LED also goes off since following configuration, the "expected
configuration" stored on the CP 243-2 matches the "actual configuration" on the
AS-Interface.
Note
Configuring the CP 243-2 during an AS-Interface Power Fail (for example when
the AS-i power supply unit is turned off or when the CP 243-2 is not connected to
the AS-Interface) resets the configuration of the CP 243-2. This has the following
results:
SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02
Technical Description and Installation Instructions
No AS-i slaves are configured;
All AS-i slave parameters are set;
Automatic address programming is activated
(bit AUTO_ADDRESS_ENABLE = 1).
1-17
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