Chapter 7
105
Flexi Link
CPU status bit Meaning
Teach required
A station that has been suspended before, has reappeared in the
system. In this case the process image of the all Flexi Link station is set
to Low and the EFI I/O error bit is set to High. To continue operation,
Teaching is required. Teaching will reset the error bit, even if the found
station has been already suspended again.
Station missing
At least one station in the system is missing. To continue operation,
Teaching is required.
This means that at least one of the Station X missing status bits (see
below) is High as well.
Station X missing
The station with the Flexi Link address X (= A, B, C or D) is missing. In
this case the process image of the corresponding Flexi Link station is
set to Low and the EFI I/O error bit is set to High.
This means that the Station missing status bit (see above) is High as
well.
Station X taught
The station with the Flexi Link address X (= A, B, C or D) is suspended.
In this case the default process image of the corresponding Flexi Link
station is used.
Using these status bits you can set up your own diagnostic system, e.g. by connecting
these status bits to a Log generator function block or by switching on a warning lamp if
Teaching is required or active.
After the transition from the Stop state to the Run state, a station is considered as
missing it it has not been found within 3 minutes.
For a description of the other CPU status bits see Section 5.6.4.
Table 16:
Meaning of the Teaching
status bits
Note
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