BECKHOFF KL3361, KL3362: Product Overview

Trigger Units

The oscilloscope terminals have two trigger units per signal channel. They are configured via sets of registers. The first trigger unit is configured via registers R40 to R45, the second one via registers R46 to R51.

Optionally, the following are used as a trigger source:

• an output word of the fieldbus
• a timer
• the analog inputs
• the digital input
• the output of trigger unit 1 for trigger unit 2

The following can be selected as a trigger event:

• rising or falling edge
• a positive or negative pulse that is greater or smaller than a specified pulse width (glitch)

The trigger can be enabled as follows:

• always, i.e. each trigger event is immediately enabled
• via the signal at the analog inputs or the digital input (each with positive or negative logic and associated threshold levels).

Enabling of the trigger evens can prompt various actions:

• start of recording
• start of a timer (chronometer)
• setting of the digital output
• saving of the current timer value
• resetting of the timer
• starting of a further timer, which is associated with the Valid Trigger Time register

The trigger units can be cascaded. This enables extremely flexible triggering depending on the cause of events. For cascaded trigger units, the Valid Trigger Time register specifies a time window, during which the subsequent trigger event must occur. If this does not happen, everything is reset and the first trigger event is once again awaited.