Profinet Io Alarms; Profinet Io-Controller Faults In The Fault Tables - GE PACSystems RXi User Manual

Chapter 10. PROFINET IO-Controller Operation

10.8.3 PROFINET IO Alarms

PROFINET IO uses Alarms to transfer indications of changes or problems in the remote
IO-Device. For example, Diagnosis Alarms are used to indicate a problem with a channel
such as a short circuit, a blown fuse, or over-temperature condition. The PNC translates
PROFINET alarms into CPU faults for the RXi CPU. The illustration below shows what
happens when a problem is detected on one of the channels of a module within a remote
IO-Device, in this case, a VersaMax PROFINET Scanner.
PROFINET Alarm Action
If a PROFINET I/O Alarm occurs, the action is Diagnostic (the action type is not
configurable). When a fault in this group is processed, the CPU sets the following status bits:
#ANY_FLT, #IO_FLT, #IO_PRES, and #PNIO_ALARM (%SA30).
The #PNIO_ALARM status bit is cleared when the I/O fault table is cleared.

10.8.4 PROFINET IO-Controller Faults in the Fault Tables

PNC faults are logged in the CPU's fault tables: the Controller Fault Table or the I/O
Fault Table. For summaries of faults and corrective actions, refer to:
Clearing the RXi Fault Tables
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RX3i Controller
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IO-Device
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Section 14.4.2, Controller Fault Descriptions and Corrective Actions
Section 14.5.3, I/O Fault Descriptions and Corrective Actions
Clearing one or both of the CPU's fault tables has no effect on the Diagnosis conditions
maintained by any IO-Device.
When the CPU's fault tables are cleared, PROFINET-related faults are not re-reported,
even if the condition that is causing the fault still exists. You should address or record the
CPU faults before clearing them.
PACSystems* RXi Distributed IO Controller User Manual
1. The PROFINET Controller establishes
Application Relationship (AR) and then
Alarm Communication Relationship (CR)
with IO-Device
2. Module detects a problem (such as short-
circuit) and reports it to IO-Device
(PROFINET Scanner).
3. IO-Device sends Alarm to PROFINET
Controller via Alarm CR.
4. PROFINET Controller logs fault in the RXi
CPU fault table.
5. PROFINET Controller sends Alarm ACK
to IO-Device via Alarm CR.
GFK-2816F