14
What information is
available in an
event?
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
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.
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.
In cases where the 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 ADC20 are:
Event Menu Item Tag
Description
Announcements
0 or NA
0 or NA
Announcing of report
and control values
Input_1..4 01
hex
=INP_.._LOSS 81
hex
=INP_.._RETURN
Channel 1-4 input
lost or returned
Tracking_1..2 0C
hex
=TRACK_.._LOSS 8C
hex
=TRACK_.._RETURN Tracking pulse 1-2
lost or returned
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.
