Axon Synapse CDV07 Teknik Kılavuz - Sayfa 13

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Introduction

What is the Goal?

CDV07 Events

Announcements

What information is

available in an

event?

The Message String

7 Events Menu

An event is a special message that is generated on the card

asynchronously. This means that it is not the response to a request

to the card, but a spontaneous message

The goal of events is to inform the environment about a changing

condition on the card. A message may be broadcast to mark the

change in status. The message is volatile and cannot be retrieved

from the system after it has been broadcast. There are several

means by which the message can be filtered

The events reported by the CDV07 is as follows;

Announcements is not an event. This item is only used for

switching the announcement of status changes on/off. 0=off,

other =on

Input

Input can be selected between 0 .. 255. 0= no event, 1..255 is the

priority setting.

The message consists of the following items;

1) A message string to show what has happened in text, for

example: "INP_LOSS", "REF_LOSS", "INP_RETURN".

2) A tag that also shows what happens, but with a predefined

number: e.g. 1 (= loss of input), 2 (= loss of reference), 129(=

1+128 = return of input). For a list of these predefined tags

see the table on the next page.

3) A priority that marks the importance of an event. This value is

defined by the user and can have any value between 1 and

255, or 0 when disabled.

4) A slot number of the source of this event.

The message string is defined in the card and is therefore fixed. It

may be used in controlling software like Synapse Set-up to show

the event.