User Manual Section 4
GFK-2958L May 2021
Detailed Descriptions of the Fieldbus Network Adapters 76
4.2.7 RSTi-EP PROFINET Channel Diagnostic Alarm Reporting
RSTi-EP PROFINET channel specific diagnostic alarms, generally described as, “Diagnostic
Alarms” are fault messages associated with a channel or I/O point. Diagnostic alarms are
always transferred acyclically over the PROFINET Network using record data
communications over the Non Real Time (NRT) channel to the PROFINET Controller, which
then formats the diagnostic alarms for entry into the appropriate PACSystems fault table
in the CPU. The diagnostic alarms can be configured to be reported in different data
formats depending upon what information is most important to the user’s application.
This section elaborates about,
a) Extended Channel Specific Diagnostic Alarm Format:-When configured specific
channel fault information is updated under “Fault type” as a user readable text in IO
fault table.
b) Vendor Specific Diagnostic Alarm Format:- When configured, generic text
“Manufacturer Specific Diagnosis” is shown in “Fault Type”. Additional, data is
provided as part of “Fault Extra Data” which needs to be decoded as shown below.
Extended Channel Specific Diagnostics represents the fault in readable text format. Vendor
specific Diagnostics faults provides only first 21 bytes of module diagnostic information as
part of extra fault Data in IO fault table for PAC controllers & this information should be
decoded so that user can program the logic accordingly. Vendor specific diagnostics may
provide 47 bytes of Diagnostic information with other Controllers.
Note: Settings for Individual channels needs to be enabled under “General Parameters”
Tab for enabling the diagnostics reporting to the controller. All the Channel
specific diagnostic alarm fault entries in IO fault table can be read using
SVC_REQ20 & can be reported to HMI as well.
The list of RSTi-EP modules that support Channel Level Diagonstics are:
• EP-1813
• EP-3264
• EP-3468
• EP-3664
• EP-3704
• EP-3804
• EP-4264
• EP-5111
• EP-5112
• EP-5324
Extended Channel Specific Diagnostic Alarm Format
In order to enable Extended Channel Diagnostics, Diagnostic Alarms must be enabled on
the Network Adapter as well as for each channel from which the user wishes to receive
Diagnostic Alarms. To enable Extended Channel Diagnostics in the Network Adapter
settings, under the General Parameters tab, the user must set “Diagnostic Alarm” as
“enabled,” and “Type of Diagnostic” as “Extended Channel Diagnostic”. Once enabled,
Extended Channel Specific Diagnostic Alarm messages will appear in the IO fault Table
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