3. Diagnosis
3-10
Festo Festo P .BE CP FB13-E-EN en 9910c
Busy bit
With device-related diagnosis 1, the CP system supplies
status information as bit 1:
– Busy bit = CP system in starting phase and therefore not
ready for date exchange
If the busy bit is set (= “log. 1”), the diagnostic bits in bytes
2..5 contain “log. 0”. Only device-related diagnosis 1 is sup-
ported.
Diagnostic possibilities
The CP system offers extensive diagnostic possibilities via the
PROFIBUS-DP. The diagram below shows you the steps re-
quired for diagnosing the CP system. Only the diagnostic
bits, which require a further diagnostic step, are represented.
12304567
1
Bit
Station status 1
Device-rela ted diagnosis 1
Bit
Device-related
Diagnosis 1 sensible
12304567
1
Device-related
It is sensible to read out diagnoses
2...5
Fig. 3/2: Diagnostic steps
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