Watchdog NTC to F500 PGW CAI REV0 July 2014
Fieldbus type = Profibus DP – This describes the type of Fieldbus module which is
installed in the F500 Elite. If the Fieldbus module is faulty some or all of this data will
change to suggest which area may be at fault. For example, FBI version number might
become 245.55. An unusually large number such as this is not usually associated with a
normally functioning module and would suggest that the Fieldbus interface controller has
failed. In the event of this or any other fault, contact your supplier.
The sequence S2468E indicated that the system has initialised correctly, a deviation from
this indicates that one or more parts of the initialisation process has failed. If this is the
case, recycle power and see if this clears the problem. If you still have problems with the
initialisation of the unit contact your supplier and tell them what you see on the
diagnostics display. The main area of the display shows the complete data from
Watchdog address number 1 as described on pages 9 to 15 of this manual.
Diagnostics LED.
Located on the main circuit board, just above the RS485 connections to the Watchdog
you will find an LED indicator (usually RED). This indicator will flash every time the
F500 attempts to communicate with the Watchdogs. The LED will normally flash at a
consistent rate followed by a very short pause. The short pause indicates that the F500 is
updating the information which it stores internally. A significant deviation from this
sequence is an indication that there is a problem. If this happens, contact your supplier
for further information.
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