Technical Description and Installation Instructions
1.9Configuring the AS-Interface with the SET Button
Interpreting the Display Status
The CP 243-2 distinguishes between two operating modes on the AS-Interface:
SConfiguration mode
SProtected mode
Pressing the SET button changes the operating mode.
Note
The SET button is only effective when the bit PLC_RUN = 0 is set in the control byte of the CP 243-2. This is always the case when the S7-22x CPU is in the STOP mode.
Configuration Mode
The configuration mode is used to install and start up an AS-i installation.
If the CP 243-2 is in the configuration mode (CM LED lit), it can exchange data with every AS-i slave connected to the AS-i cable (except for an AS-i slave with address '0'). Newly added AS-i slaves are detected immediately by the master, activated, and included in cyclic data exchange.
When installation and startup is completed, the CP 243-2 can be switched to the protected mode using the SET button. At the same time, active AS-i slaves are configured. The following data are then stored permanently on the CP 243-2:
SThe addresses of the AS-i slaves
SThe ID codes (ID code, extended ID1 code, extended ID2 code)
SThe I/O configuration
SThe current slave parameters
Protected Mode
In the protected mode, the CP 243-2 exchanges data only with the configured AS-i slaves. In this sense, ªconfiguredº means that the slave addresses and the configuration data stored on the CP 243-2 match the values of existing AS-i slaves.