ABB OMD800, Инструкция по установке и эксплуатации

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AUTOM ATIC CONTROL U N IT, OM D8 0 0
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9.1
Explanations of internal faults OMD800
When digital Input 1 and 2 are both active, logic is locked and the Alarm LED is ON.
When digital Input 3 is active, logic is locked and the Alarm LED is ON.
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9.2
Change-over switch does not respond
During the switching sequence, the OMD800 operates the change-over switch (Switch I) first to the
position O from position I. If this transition is not completed in three seconds, the Open 1 Failure is ac-
tivated. If switching to the position O is completed, but the transition (Switch II) from O to II fails, the
Close 2 Failure is activated. These alarms will lock the switching logic and can only be reset by pushing
the AUTO key.
During the back switching sequence, similiar transitions will be perfomed from II to O and from O to I,
possibly activating Open 2 Failure or Close 1 Failure.
Figure 9.1 Unsuccesful switching sequence
Figure 9.2 Succesful switching sequence
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9.3
Missing of both lines
The missing of both lines is indicated by a blinking Power LED. In this case, the OMD800 will be in a
power saving state. If both lines are missing more than one minute, the OMD800 will shut down.
Close Switch IIClose the switch II on LN2
(max. operating
duration 3 s)
Switch I status The switch I in
position I -status
Switch II status The switch II in
position II -status
Close Switch II
Switch I status
Switch II status
Alarm
A04153
A04154
3 s
Close Switch II
Switch I status
Switch II status
Alarm
Open 1 Failure Close 2 Failure
Switch I status
Switch II status
Alarm
3 s
Close Switch II
Close
Open