Contents
42
PAC8000* IO PROFINET Scanner
User’s Manual–September 2017
GFK-2839B
4.2.2
PROFINET Diagnostics
The PNS reports its own non-fatal errors and errors on modules using PROFINET Diagnosis
or PROFINET Pull/Plug alarms.
4.2.2.1
PROFINET Diagnosis Alarms
Diagnosis Alarms indicate any fault conditions other than a module add, loss, or mismatch
that a PAC8000 PROFINET Scanner needs to communicate to the PROFINET IO-Controller.
Most faults generate Diagnosis alarms. Situations that do not send a PROFINET Diagnosis
are covered in a later section.
When the PAC8000 PROFINET Scanner detects a fault condition, it sends a Diagnosis alarm
to the IO-Controller. If there is an Application Relationship (AR) currently active, the PAC8000
PNS sends the Diagnosis alarm over that AR. Otherwise, the alarm is placed in diagnosis
memory in the PNS
to be read later, and no alarm is sent. The Scanner’s FAULT LED is ON
and the FAULT status bit (see bit definitions of PNS status register mentioned earlier in this
chapter) is set to 1. An alarm is not generated on subsequent connections.
The PNS automatically clears (and sends Diagnosis Disappears alarms for) these diagnosis
faults after the fault condition has been corrected. If no additional conditions exist in memory,
the FAULT LED is turned OFF and the FAULT status bit is set to 0.
The table on the next page lists the faults reported to the IO-Controller. The PAC8000 PNS
generates all of its application faults as channel diagnosis faults. The AlarmType is Diagnosis
Appears or Diagnosis Disappears. The left column lists the Channel Error Type in
PROFINET.
