Diagnostic Modules - Pepperl+Fuchs FIELDBUS Manual

Compact Fieldbus Power Hub,Generic Interface
Specification
2.2.3

Diagnostic Modules

Basic Diagnostic Module
The Basic Diagnostic Module provides basic system diagnostics. It monitors the input voltage
of the bulk power supply and each segment for overload and short circuit conditions. Each
Power Supply Module is checked for proper function. Power Modules operating in redundant
configuration are checked for compatibility. Status and faults are indicated by LEDs and can be
transmitted via dry contact.
Advanced Diagnostic Module
The Advanced Diagnostic Module is a comprehensive measurement tool for the fieldbus
physical layer. It is well suited for commissioning, online monitoring and maintenance. The
module provides the exact segment and individual device data needed for detection of
changes in the fieldbus physical layer. Segment measurements include fieldbus voltage and
load current; device specific measurements are: signal level, noise, and jitter. All data is
transmitted to the control room via Ethernet. The Diagnostic Manager – Basic Edition shows all
data on easy-to-use displays.
The Diagnostic Manager – Professional Edition offers additional functionality: the
commissioning wizard generates automated reports; the software displays clear text messages
for troubleshooting of out-of-spec behavior. The OPC server transmits user-selectable
summary alarms to the DCS.
For further information please refer to the manual Advanced Diagnostic Module HD2-DM-A.
Advanced Diagnostic Module Relay Output
The ADM relay output is a tool for permanently monitoring the fieldbus physical layer. Using
DIP switches, limit ranges can be configured for each physical layer parameter monitored.
The module distinguishes between two alarm types:
"Maintenance required" alarm
■
"Out Of Specification" alarm
■
The "Maintenance required" alarm enables proactive diagnosis. If a value exceeds the limit, a
relay contact opens and the respective segment LED starts to flash yellow. With this proactive
diagnosis, changes within the fieldbus installation can be detected early and fault sources can
be found before communication fails.
If an "Out of specification" alarm occurs (LED flashing red), one of the monitored physical layer
parameters has rapidly declined and moved out of range of "Maintenance required". A fast
examination of the affected segment is crucial to prevent a total dropout of this segment in the
near future.
To set up appropriate limit values for your fieldbus installation, a comprehensive diagnostic
solution such as the Pepperl+Fuchs Mobile Advanced Diagnostic Module is required during
commissioning to determine the DIP switch positions.
12