Triggered Pulse Output

The Triggered Pulse Output feature enables an output point to generate a precise, hardware-timed pulse in response to a trigger event. When a trigger is detected, the module automatically turns the output ON after a configurable delay and keeps it active for a predefined duration before turning it OFF. This functionality provides accurate and repeatable output control independent of controller scan times.

The pulse timing is executed directly by the module's onboard hardware timer. Both the pulse ON time and pulse OFF time are managed locally within the module, enabling microsecond-level timing accuracy. As pulse generation is performed in hardware, the output remains deterministic and is not affected by controller processing speed, program scan time, or network communication delays.

A Triggered Pulse Output can be initiated from multiple sources:

Controller Tag – A controller tag (
O.Ptxx.Trigger
) triggers the pulse output directly.
Hardware Inputs – A rising or falling edge of a local input signal triggers the pulse output.
To initiate the pulse output on the falling edge of the input signal, enable the Invert Trigger option in the Module Properties window.

If a triggering transition occurs while the current pulse output is already active or during the delay period (waiting), the new trigger is ignored and

I.Ptxx.TriggerMissed

bit is set to indicate that a trigger event was missed. Use the

O.Ptxx.ResetTriggerMissed

bit to reset the

I.Ptxx.TriggerMissed

bit.

You can control the output pulse timing using the following parameters:

Pulse Delay (in seconds)
: Defines the delay after the input transition before the output pulse starts.
You can configure this parameter using the output tag
O.Ptxx.PulseDelay
. The valid value range is (100 µs + Input Filter Time)...30 s.
Pulse Active Time (in seconds)
: Specifies how long the output pulse remains active once triggered after pulse delay.
You can configure this parameter using the output tag
O.Ptxx.PulseActiveTime
. The valid value range is 10 µs...30 s.