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5 Diagnostic system
5.3.2
Acknowledgement device port faults
The device port acknowledgement mechanism is used to acknowledge
individual device port faults.
The real acknowledgement is done via an acknowledgement pulse
of 500 ms (+/- 150 ms) which is sent from the F-PLC to the SFB-PN.
The pulse always globally acknowledges all outgoing device port faults!
Faults that have not yet been outgoing are not acknowledged.
INFORMATION
For the acknowledgement of device port faults, the qualifier bits, the error flags,
one bit for the request of the fault acknowledgement (fault outgoing) and one bit
for the acknowledgement pulse are used.
These bits are described in Chapter 4.3.6 in the submodule "Functional Data".
Acknowledgement with acknowledgement pulse
Device port fault outgoing / can be acknowledged:
−
If there are no further faults for the device port:
−
The error LED of the device port flashes GREEN as acknowledgement
request. (refer to Chapter 3.3.1)
−
Diagnostic alarm "Fault outgoing" is sent to the F-PLC.
−
SFB-PN sets the " Fault acknowledgement request" to "1".
(Bit 7, I-ADR n+1 in submodule „Functional data“, refer to Chapter 4.3.6)
The acknowledgement request for a device port fault can be evaluated by
the F-PLC.
−
The error can then be acknowledged with an acknowledgement pulse
of 500 ms (+/- 150 ms) and the device port is reactivated.
(Bit 0, O-ADR n+1 in submodule „Functional data“, refer to Chapter 4.3.6)
−
The qualifier bit of the device port is reset to "1".
(Bit 0-7, I-ADR n+1 in submodule „Functional data“, refer to Chapter 4.3.6)
−
The RED SF-LED of the SFB-PN is switched off. (refer to Chapter 3.3.3)
−
The fault LED of the device port lights up GREEN = device port free of faults.
(refer to Chapter 3.3.1)
REQ acknowl.
I-Bit 7 / n+1
+ Error flag
Fault
at device port
Ackn. pulse
O-Bit 0 / n+0
Qualifier
I-Bit 0-7 / n+0
Fault
incoming
Fault
outgoing
Fault
acknowledged
