Echelon Neuron C Instrukcja Użytkownika Pobierz pdf (Strona 28)

8 Predefined Events

}

msg_fails Event

The msg_fails event evaluates to TRUE when a message fails to be acknowledged

after all retries have been attempted. This event can be qualified by a specific

message tag.

Checking the completion event (msg_completes, or msg_fails in combination with

msg_succeeds) is optional by message tag. If a program checks for either the

msg_succeeds or msg_fails event for a given message tag, it must check for

both

events for that tag. The alternative is to check only for msg_completes.

Syntax

msg_fails [(

message-tag

)]

message-tag

An optional message tag. If this field is omitted, the

event is TRUE for any message.

Example

msg_tag tag_out;

...

msg_out.tag = tag_out;

msg_send();

...

when (msg_fails(tag_out))

{

...

}

msg_succeeds Event

The msg_succeeds event evaluates to TRUE when a message is successfully sent

(see the

Neuron C Programmer's Guide

for the definition of success). This event

can be qualified by a specific message tag.

Checking the completion event (msg_completes, or msg_fails in combination with

msg_succeeds) is optional by message tag. If a program checks for either the

msg_succeeds or msg_fails event for a given message tag, it must check for

both

events for that tag. The alternative is to check only for msg_completes.

Syntax

msg_succeeds [(

message-tag

)]

message-tag

An optional message tag. If this field is omitted, the

event is TRUE for any message.

Example

msg_tag tag_out;

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