4. Functions
CNT32-4MT(LPCI)
57
Control input signal
One control input signal is provided for each channel. The control input signal can serve for one of the
following applications. The application is software-selectable.
Table 4.7. Control input signal
Item Purpose
Condition
General-purpose input
Software status(positive logic)
Rise(Low
→
High)
Preset
Fall(High
→
Low)
Rise(Low
→
High)
Zero-clear
Fall(High
→
Low)
Rise(Low
→
High)
Control
input signal
Counter start/stop
Fall(High
→
Low)
General-purpose input
When not used for a hardware event, the control input pin can be used as the general-purpose input signal
pin. The input logic is fixed as positive logic.
Preset
When the control input signal is set to presetting, the control input pin serves as the external trigger input
pin for presetting. The rising or falling edge of the signal can be selected.
Zero-clear
When the control input signal is set to zero-clearing, the control input pin serves as the external trigger
input pin for zero-clearing. The rising or falling edge of the signal can be selected.
A counter start/stop
When the control input signal is set to counter start/stop, the control input pin serves as the external
trigger input pin for counter start/stop. The rising or falling edge of the signal can be selected for each of
the counter start and counter stop.
