Contec F&eIT Series User Manual page 61

Using the Memory Address Map
- Mono-phase counter with gate control
This option can start/stop the counting of mono-phase pulse strings according to
gate control signals.
Mono-phase pulse
(phase A/UP)
Gate control signal
(phase B/DOWN)
Count value
* The figure above illustrates the counting operation when a count direction = 01h is specified.
If count direction = 00h, a DOWN count commences when the gate control signal (phase B/DOWN)
is HIGH and when a mono-phase pulse example (phase A/UP) rises; the counting stops when
the gate control signal is LOW.
Figure 5.4.
Different functions require different counter input multipliers and clear signal
synchronization settings.
Mono-phase counter
2-phase counter
Mono-phase counter
with gate control
Note!
If invalid functions, counter input multipliers, or clear signal synchronization settings,
a module startup error results, and the module cannot be started.
56
6 7
Example of a Mono-Phase Counter with Gate Control
Counter input multiplier
Function
1x
O
O
O
No counting
8
Clear signal synchronization settings
2x 4x Asynchronous clear
× × O
O O O
O × O
9
Synchronous clear
×
O
×
CNT24-2(FIT)GY