SMA Solar Technology AG Troubleshooting
Technical Description SI5048-TB-TEN110340 195
20.3 Master-Slave Handling
Each device detects the errors separately and saves them. The slaves transfer their errors to the master.
The master collects these error messages and enters the slave errors as warnings into its history.
Example:
Slave 1 has detected overtemperature. It enters this error in its history and reports it to the master,
which also enters it as a warning into its failure history ("Menu 420# Failure History").
The following message appears in the lower display line
on the master.
If warning 138 is still active on slave 1, the Enter symbol appears at the end.
After the warning has been confirmed on the master by pressing the <ENTER> key, it is forwarded to
the respective slave.
The master shows the following message after
confirmation.
20.4 Handling Pending Failures During the Booting Procedure
During the booting procedure, all pending failures are generally confirmed without an entry being
made in the history. This way, after the booting procedure failure that is still pending will be re-entered,
or if the system detects that this failure has stopped, it is entered as no longer being present.
No comparison between master and slave
The failure and event memory are not compared between the master and slaves. The slave
device's errors are confirmed when the Sunny Island system is restarted.
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