AMMONIA User Manual
AMMONIA_User 9/09
4
1
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.