Replacing A Defective As-I Slave/Automatic Address Programming - Siemens DP/AS-Interface Link 20E Manual

Dealing with Problems/Error Displays
5.1 Replacing a Defective AS-i Slave/Automatic Address
Programming
Simple Replacement of AS-i Slaves
Using the automatic address programming function, you can replace failed AS-i
slaves extremely simply.
Notice
Remember that "automatic address programming" is only possible in the
following situations:
– The DP/AS-i Link 20E module is in the protected mode
and
– Only one AS-i slave has failed.
The sections below explain how to replace failed AS-i slaves using the automatic address
programming function.
Detecting a Defective AS-i Slave
If the AUP LED is lit (only in the protected mode) this indicates the following:
S Exactly one slave has failed.
S Automatic address programming by the DP/AS-i Link 20E is possible.
You can recognize the failed AS-i slave simply because the LED assigned to the
slave flashes on the front panel. To see this, you must switch to the slave display
(see Section 1.7.2)
You can now replace the defective AS-i slave as follows:
S Replace the defective AS-i slave with an identical AS-i slave with address
zero (default address).
The DP/AS-i Link 20E module now programs this slave with the address of the
original slave you are replacing.
The "AUP" display goes off. The LED in the slave display of the DP/AS-i Link 20E module indicates
that the slave has been included.
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DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04