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Error Messages
Controller Error
Die CTRL message indicates an error on the controller board.
The display color changes to red.
Controller errors have highest priority.
The first line displays CTRL, the second an error code as hex
value.
When locating errors of first and second priority, the station
name can be indicated via the ENTER key. However, to
achieve this, the name must first be assigned to the bus seg-
ment and location by means of software.
Error Localization
If an error occurs in the bus system (shown gray in the figure),
a diagnostics routine is automatically started on the controller
board. This diagnostics routine attempts to put the bus in op-
eration one segment after the other in order to locate the er-
ror.
While the error localization is being carried out, the display in-
dicates the message LOOK FOR FAIL which is shown over
the three main lines (see Figure 8).
The background color changes to red.
Figure 8: Error localization message
5241A008
Segment 1
Segment 2
Segment 3
INTERBUS
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