Siemens CP 243-2 User Manual

Page 25

Technical Description and Installation Instructions

1-17

SIMATIC NET CP 243-2 AS-i Master
C79000-G8976-C142/02

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:

No AS-i slaves are configured;

All AS-i slave parameters are set;

Automatic address programming is activated
(bit AUTO_ADDRESS_ENABLE = 1).