DESCRIPTION OF OPERATING MODES
6
COUNT MODES
The control has five count modes, which are:
Count with separate add and subtract inputs,
Count with direction control input, Count up with
inhibit control input, Quadrature, and Doubled
Quadrature.
Add and Subtract Inputs
The add and subtract mode allows separate sig-
nals to simultaneously add and subtract counts. It
can be used to indicate material stretch, subtract
defective parts from total parts produced, etc.
Count with Directional Control
Count with direction control mode uses one input
for incoming count pulses and the other to inform
the control whether the pulses should be used to
add or subtract counts. Count with direction may
be used when an item must be measured or posi-
tioned. Many types of sensors or control systems
utilize count signals of this nature.
In both of the above count modes, the counter will
normally increment or decrement on the falling
edge of the incoming count pulse. (The falling
edge is defined as the moment in time when the
pulse changes state from +DC to DC Common
potential.) Doubling allows the counter to incre-
ment or decrement on both the falling and the ris-
ing edges of the pulse. (The rising edge is defined
as the moment when the pulse changes state from
DC Common to +DC potential.)
Count with Inhibit Control
The count up with inhibit control mode provides an
input which increments the control and an input
which causes incoming count pulses to be
ignored. This mode can be used when defective
material must be ignored or when inspection sam-
ples are taken without incrementing the counter.
The count up with inhibit control mode may not be
doubled.
Quadrature Inputs
Quadrature counting makes use of two count sig-
nals which are phase shifted by 90 degrees. The
detection of which signal is rising first allows the
counter to know in what direction the shaft is turn-
ing. When Quadrature count sources are being
used, the Double Input must always be connected
to DC Common to allow the quadrature signals to
be decoded.
Quadrature Input Doubled
Doubled Quadrature is implemented by program-
ming. This mode allows the counter to count on
both the rising and falling edges of the incoming
count pulses. The number of pulses per revolution
of the shaft encoder is effectively doubled,
increasing the resolution without any loss of accu-
racy.
COUNT SCALING
When the 5886-1400 receives a count pulse in any
count mode, the count is increased by the scale
factor for count-up pulses and decreased by the
scale factor for count-down pulses. The count
shows the accumulated total in whole increments.
Accumulated Total = Total Number of Pulses ×
Scale Factor.
DECIMAL POINT LOCATION
The location of the decimal point on the display is
programmed and may be located between any two
digits on the display, or omitted. When a printer is
connected to the serial communication output, the
decimal point is printed.
The decimal point remains on the display when-
ever the actual value of the counter or the preset
value is being displayed. It is not lit when function
codes or other function entries are being dis-
played. The timeout function automatically dis-
plays the decimal point to indicate 0.01 second
increments.
COUNTER OPERATING MODES
Reset Mode
Reset mode is used when the counter should start
at zero and count up to the preset values. Reset
mode implies that when the “RESET” key is
pressed or the Reset input in energized, the
counter is reset to zero.
Preset Mode
Preset mode is used when the control must start at
a preset value and count down to zero. Preset
