User manual

33003962 11/2011 167
Magelis XBT N/R/RT
Glossary
33003962 1 1/2011
Glossary
A
alarm panel
Information panel displayed when an alarm occurs on the automation system.
An alarm panel is displayed by the automation system, when the associated boolean
variable changes.
It is generally used to provide to the operator all the information and the description
of the actions he has to do, in order to deal with the current alarm.
alarm table
An alarm table is a communication table that contains only words related to alarm
functions.
Each bit of alarm words can be associated to an alarm.
The equipment can use it to signal to the terminal that an alarm has occurred.
The terminal can use the status words of the alarm table to report to the equipment
that the operator has acknowledged an alarm.
alphanumeric
characters (A-Z) and numbers (0-9)
alphanumeric display units
These are only capable of displaying characters (with a font resolution usually 5x7
pixels). The characters are physically separated from one another.