Procentec ProfiHub B5 Plus - Diagnostics Device

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ProfiHub B5+ / B5+RD User Manual

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Version 2.0 – July 2014 Page 23 / 56

3 Diagnostics Device

The B5+ is available with a built-in Diagnostics Device option. The order code for this ProfiHub B5 with

diagnostics device is 17020RD.

The Diagnostics Device is a very versatile statistics/diagnostics logger. It can be used to keep track of

the overall PROFIBUS network health and inform the PLC or DCS of any network failure such as

repeats or illegals, missing ProfiHub termination, live list changes, or power supply problems. Audible

or visible feedback is also possible by automatically switching the integrated alarm relay.

This information can also be read easily with ProfiTrace because the Diagnostic Device sends this

data over PROFIBUS. This enables maintenance engineers to immediately identify the affected

segment in case of cable problems or instrument failure. Having a Diagnostics Device in your network

dramatically decreases downtime because problems can be solved much quicker; it tells you where to

look. SCADA applications can make this even easier.

Fig. 18 – Cable problems or node loss can be identified by the ProfiHub channel, and send this

information over PROFIBUS to the PLC. ProfiTrace can also read this.

The following statistics and events are continuously monitored:

Events: Statistics:

Alarm Relay opened/closed Losts

Cable Redundancy change Syncs

Baudrate change Repeats (total)

Power input changed Repeats (max. changed in 1 cycle)

Termination of Channel changed Illegals

Communication on Channel stopped/started Internal Diagnostics

Livelist changed (station removed or added) External Diagnostics

Diagnostics while in Data Exchange

All of these events and statistics can be transferred in four different ways, so that the PLC/DCS or user

can be warned that something is happening in the PROFIBUS network: a PROFIBUS input message,

a diagnostic message, an external diagnostics message, or it can trigger the built-in alarm relay.