Axon Synapse GPI16, Technical Manual

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The Tag The tag is also defined in the card. The tag has a fixed meaning.
When controlling or monitoring software should make decisions
based on events, it is easier to use the tag instead of interpreting a
string. The first implementation is the tag controlled switch in the
GPI16.
When an event marks a change to fault status (e.g. 1 for Loss of
Input) the complement is marked by the tag increased by 128 (80
hex
)
(e.g. 129 (81
hex
) for Return of Input).
Defining Tags The tags defined for the GPI16 are:
Event
Menu Item Tag* Description
Announcements 0 or NA 0 or NA Announcing of report
and control values
GPI 08
hex
=GPI_ON_# 88
hex
= GPI_OFF_# GPI relay event
* For all tags see selected card numbers
The Priority
The priority is a user-defined value. The higher the priority of the
alarm, the higher this value. Setting the priority to Zero disables the
announcement of this alarm. Alarms with priorities equal or higher
than the Error Threshold setting of the RRC will cause the error LED
on the Synapse rack front panel to light.
The Address
Together with the message string or the tag, the slot number or
address of the card is relevant to be able to assign the event to a
certain card.