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MODE 0 LATCH OUTPUT AT PRESET, MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, the output will latch
on when the preset is reached. When a manual reset
✦
occurs, the
unit will Reset to Zero and the output, if latched on, will unlatch.
Counts will continue to accumulate after the output has turned on.
MODE 1 TIMED OUTPUT AT PRESET, MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, the output will turn
on when the preset is reached. The output will turn off after its
programmed time value has occurred. When a manual reset
occurs, the unit will Reset to Zero. Manual reset
✦
will terminate the timed
output, if the output is still activated. Counts will continue to accumulate after
the preset level has been reached.
MODE 2 & 3 -
✦✦
MODE 4 TIMED OUTPUT AT PRESET, AUTOMATIC RESET TO ZERO AT PRESET
In this mode, as the unit counts from zero, the output will turn
on when the preset is reached. At the same time, the unit will
automatically Reset to Zero and start the cycle over again. The
output will turn off after its programmed time value has occurred. Manual
reset
✦
will turn off the output, if turned on, and reset the count to zero.
During automatic reset, no counts will be lost if the count rate does not
exceed 2,500 cps.
MODE 5 -
✦✦
MODE 6 TIMED OUTPUT AT PRESET, AUTOMATIC RESET TO ZERO AFTER THE
TIMED OUTPUT
In this mode, as the unit counts from zero, the output will turn
on when preset 1 is reached. The output will turn off after its
programmed time value has occurred. At the end of the timed
output, the unit will automatically Reset to Zero and start the cycle over again.
During automatic reset, no counts will be lost, as long as the count rate does
not exceed 2,500 cps. Manual reset
✦
will turn off the output, if turned on, and
reset the count to zero.
MODE 7 -
✦✦
✦
Manual reset, either by front panel reset (if enabled) or remote reset, is
always active, and will override any condition or state the counter is
presently in.
MODE 8 LATCH OUTPUT AT ZERO, MANUAL RESET TO PRESET ✝
In this mode, as the unit counts from preset, the output will turn on when
zero is reached. The output will turn off after its programmed time value has
occurred. When a manual reset
✦
occurs, the unit will Reset to
Preset and the output, if latched on, will unlatch. Counts will
continue to register after the outputs turn on.
MODE 9 TIMED OUTPUT AT ZERO, MANUAL RESET TO PRESET ✝
In this mode, as the unit counts from preset, the output will turn on when
zero is reached. The output will turn off after its programmed time value has
occurred. When a manual reset
✦
occurs, the unit will Reset to
Preset. Manual reset will terminate the timed output if the output
is still activated. Counts will continue to accumulate after the
output has activated.
MODE 10 & 11 -
✦✦
MODE 12 TIMED OUTPUT AT ZERO, AUTOMATIC RESET TO PRESET AT ZERO ✝
In this mode, as the unit counts from preset, the output will turn on when
zero is reached. At this time, the unit will automatically Reset to Preset. The
output will turn off after its programmed time value has occurred.
Manual reset
✦
will turn off the output, if turned on, and reset the
count to preset. During automatic reset, no counts will be lost if
the count rate does not exceed 2,500 cps.
MODE 13 -
✦✦
MODE 14 TIMED OUTPUT AT ZERO, AUTOMATIC RESET TO PRESET AFTER THE
TIMED OUTPUT
✝
In this mode, as the unit counts from preset, the output will turn on when
zero is reached. The output will turn off after its programmed time value has
occurred. At the end of the timed output, the unit will
automatically Reset to Preset and start the cycle over. During
automatic reset, no counts will be lost, as long as the count rate
does not exceed 2,500 cps. Manual reset
✦
will turn off the output, if turned
on, and reset the count to preset.
MODE 15 -
✦✦
✝ When down count is desired, (such as reset to preset modes of operation)
the “UP/DN” terminal must be tied to the “COMM.” terminal.
✦✦
These modes are not applicable to the single preset Libra counter (they
are used only for the two preset counter unit).
Mode settings of the switches are shown to the right of the text below. The
mode number corresponds to a binary code, represented by the DIP switch
positions. When the switch is “UP”, it is equivalent to a zero. When the switch
is “DOWN”, it is equivalent to a one. The mode switch settings can be easily
observed from the panel front by using the self-test. At the end of self-test, the
state of these mode switches are displayed.
NOTES:
1. For all the following modes of operation, when the unit is set for a Reset to
Zero mode, the UP/DN terminal (count direction) is normally left high (in
“UP” position). When the unit is set for a Reset to Preset mode, the UP/DN
terminal is normally tied to common (in “DOWN” position). However, even
though these are the usual conditions for the UP/DN terminal, it does not have
to operate in this fashion. For example: the unit can count down in a Reset to
Zero mode or count up in a Reset to Preset mode and still maintain normal
operating functions.
2. The timed output must be less than the time required to count from the reset
condition to the preset point. Otherwise, the output will appear to be latched-on.
MODES OF OPERATION FOR SINGLE PRESET LIBRA COUNTER
MODE 0 LATCH OUTPUT AT PRESET, MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, output 1 will latch on when
preset 1 is reached, and output 2 will latch on when preset 2 is
reached. When a manual reset
✦
occurs, the unit will Reset to Zero
and the outputs, if latched on, will unlatch. Counts will continue to
accumulate after the outputs have turned on.
MODE 1 TIMED OUTPUTS AT PRESETS, MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, output 1 will turn on when preset
1 is reached, and output 2 will turn on when preset 2 is reached.
The outputs will turn off after their respective programmed time
values have occurred. When a manual reset occurs, the unit will
Reset to Zero. Manual reset
✦
will terminate the timed outputs, if the outputs
are still turned on. Counts will continue to accumulate after the preset levels
have been reached.
✦
Manual reset, either by front panel reset (if enabled) or remote reset, is
always active, and will override any condition or state the counter is
presently in.
MODE 2 OUTPUT 1 TURN OFF AT PRESET 2, LATCH OUTPUT 2 AT PRESET 2,
MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, output 1 will turn on when preset
1 is reached. When preset 2 is reached, output 2 will turn on and
output 1 will turn off. Output 2 will remain latched on until a
manual reset occurs. Manual reset
✦
will turn off both outputs and
the unit will Reset to Zero. Counts will continue to accumulate after the preset
levels have been reached.
MODE 3 OUTPUT 1 TURN OFF AT PRESET 2, TIMED OUTPUT 2 AT PRESET 2,
MANUAL RESET TO ZERO
In this mode, as the unit counts from zero, output 1 will turn on when preset
1 is reached. When preset 2 is reached, output 2 will turn on and
output 1 will turn off. Output 2 will turn off after its programmed
time value has occurred. When a manual reset occurs, the unit
will Reset to Zero. Manual reset
✦
will also turn off both outputs if they are
still activated. Counts will continue to accumulate after preset levels have
been reached.
(Modes Cont’d)
MODES OF OPERATION FOR DUAL PRESET LIBRA COUNTER
MODES OF OPERATION
LIBC-j.QXD 10/26/04 10:52 AM Page B3
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