How to associate an event with a virtual output

Introduction

Virtual outputs are not the module's physical outputs but they act on the internal status bits of the module and can be associated with events.

A virtual output can therefore trigger an event task of the PLC processor.

Properties of event outputs

The possible properties of event processing are:

Normal (no event associated with the channel),
channel by channel event processing:
- Event triggered on a rising edge (RE),
- Event triggered on falling edge (FE),
- Event triggered on rising and falling edges.

If both transition types are selected on one channel, only one event number is assigned to the channel.

Event inputs are assigned an (Evti) processing number. These numbers range from:

0 to 31 for TSX 571•• processors,
0 to 63 for TSX 572••,TSX 573••,TSX 574••, TSX PCI 572••,TSX PCI 574•• and TSX 575•• processors.

The highest priority event processing (Evti) is number 0. This can only be assigned to channel 0.

NOTE: The default event number is the first available in the list.

A number entered manually outside the tolerance range is not accepted when validating.

Adding, deleting, or changing the event number is not accessible in online mode.

Performance

The maximum frequency of events is 1 kHz / Number of event-programmed outputs.

The maximum number of events in burst is 100 events per 100 ms.

Procedure

The following table shows the various steps involved in associating an event with an output and then defining its properties.

Step	Action
1	Access the module configuration screen.
2	Select the Config. outputs tab.
3	Double-click in the Event cell of the channel to be assigned.
4	Select the desired function.
5	Enter the event number Evt.
6	Repeat the operation for each channel to be configured (from step3).