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DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
Slave Diagnostics
With slave diagnostics, errors on PROFIBUS DP (for example parameter
assignment errors) and errors on the AS-Interface are signaled to the DP master.
In the protected mode, the DP/AS-Interface Link 20E (DP/AS-i Link 20E)
signals“diagnostics” whenever the configuration on the AS-Interface is changed.
Changes to the configuration include: when the voltage on the AS-Interface is too
low (AS-i Power Fail) and when configuration errors are detected (missing,
incorrect or existing but unconfigured AS-i slaves).
If the error is eliminated again on the AS-Interface, this is indicated by“leaving
diagnostic state” (bit 3 in the station status 1 set to“0”).
The exact cause of the problem is entered in the device-related diagnostic
information – see Section 4.5.
In the configuration mode, errors on the AS-Interface are not indicated to the DP
master.
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