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AMMONIA User Manual
AMMONIA_User 9/09
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3.3 Inverting Contact Sets
A contact set ON can be switched
to OFF using Invert Sense.
To view or modify a contact set Invert Sense
key UP or DOWN to the target contact set
and press ENTER then DOWN .
Note that in this example
RUN/STOP U is currently OFF .
Key ENTER @ Configure .
and then UP to Invert Sense
Key ENTER and UP to display Yes .
Key ENTER to select YES and EXIT
to display that in this example
RUN/STOP U now displays ON .
Key ENTER and UP to
RUN/STOP U Diagnostic .
Current State displays that the ‘ U ’
contact set is OPEN and
that ‘ U ’ is inverted, &Invert .
Configure
Diagnostic
Invert sense
No
Invert sense
Yes
Invert sense
Current State
OPEN&Invert
and
and
RUN/STOP
OFF U
Interlock
OFF U
Diagnostic
and
and
Sidebar:
Inverting Sense:
Contact sets interlock and control when they are ON .
For non-inverted contact sets, ON is when the contact set is closed.
If you wish to Interlock or control when the contact set is open, set Invert sense to YES.
If your contact sets are open when they are measuring the state you
wish to alarm, control using or log, set Invert sense to YES.
RUN/STOP an ‘Invert sense’ Example:
Contact set ‘ U ’ is used for a RUN/STOP switch.
The switch contacts are OPEN when the switch is set to RUN.
Invert sense is set for ‘ U ’ so that RUN displays on the Analyzer as ON
and so that ‘ U ’ can be used as a flowswitch for pumps and solenoids.