red lion C48C, Instruction Manual

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QUAD 1 - Quadrature counting modes are primarily used in positioning and
anti-jitter applications. This mode works due to the manner in which the two
incoming pulses are positioned relative to each other. The pulse signal on
Input B is shifted 90° away from the pulse signal at Input A. These two
signals are processed by the C48C as follows:
Input A serves as the count input, while Input B serves as the quadrature
input. For quadrature with single edge counting, the counter counts in a
positive direction when Input A is a negative going edge and Input B is at a
low level. The counter counts in a negative direction when Input A is a
positive going edge and Input B is at a low level. All transitions on Input A
are ignored when Input B is at a high level. These logic rules provide the
basis for anti-jitter operation which prevents false counts from occurring due
to back-lash, vibration, chatter, etc.
QUAD 2 - When two edge counting is used, the quadrature mode works the
same as with single edge counting when Input B is low. But, when Input B
is a high level, counts at Input A are no longer ignored. Instead, the logic
rules for Input A are complemented, allowing both edges of Input A to be
counted. This doubles the effective resolution of the encoded input.
QUAD 4
- This takes the quadrature mode, with two edge counting, one step
further. In quadrature times 4, both Input A and Input B serve as the count or
quadrature input, depending on their state. In one instance, Input A serves as
the count input and Input B serves as the quadrature input. In another
instance, Input A is the quadrature input and Input B is the count input. This
enables each edge, positive and negative going , of both inputs, A and B, to
be counted. This results in a resolution four times greater than in the basic
quadrature X1 mode.
Counter (1) Operating Mode
The charts on the following pages show operating modes
for single preset and the dual preset / Batch Counter
Models. In the descriptions below the “Main Preset or
Output” refers to “Preset or Output 1” on the single preset
Model. On the dual preset or Batch Models it refers to
“Preset or Output 2”.
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Single or Dual
Preset Model
Batch Model
Reset Type :
Auto - unit automatically resets when count triggers
main preset’s output or at its timed output end, as
programmed.
Manual - unit does not reset when count triggers main
presets output or at its timed output end. The counter
can be manually reset by a User Input or by a Serial
Communications command.
Reset to
:
Zero - When reset (manually or automatically) counter goes to zero. The
Main Preset Output is triggered when count value reaches main Preset
Value
Preset
- When reset (manually or automatically), the main Preset value is
loaded into the counter. The main Preset Output is triggered when count
reaches zero.
At Timed Output End
:
When this mode is selected, Auto Reset occurs when the main preset’s
Output time elapses and the main output deactivates. If not selected, Auto
reset occurs when the main output is triggered.
Output 1: (Main Output for Single Preset Model)
Latched - When Output 1 activates, it stays activated or latched until it is
manually reset.
Timed
- When Output 1 is activated it stays activated for the time specified
by the Output 1 Time Value. Output 1 deactivates after the Output 1 time
elapses.
O1 Off at O2:
(dual preset / Batch Model only)
Output 1 activates at Preset 1. It deactivates when Output 2 is activated. Does
not apply when activating Output 2 using Serial Communications command.
Output 2:
(dual preset / Batch Model only; Main Output)
Operates similarly to Output 1 Latched and Timed modes.