User`s guide

Table Of Contents
Alarm Management
Mitsubishi Electric, MA00759F 165
Alarms can assume the following statuses.
Alarm times can be shown in the following format.
The alarm block can be accessed either by defining a jump to system block 990 in a
block, by pressing [LIST], or by allowing the controller to present the list through a
Display signal for block 990.
An alarm can be acknowledged by placing the cursor on the line with the alarm and
clicking [ACK], by pointing at the alarm symbol or by acknowledging it with a
function key. If a printer is connected, alarms can be printed out as they occur, or as
their status changes. This is specified when the alarm is defined. Alarms will be print-
ed with the number of events, date, time, status, and alarm text.
Historical inactive acknowledged alarms can be deleted by pressing [] (BACK
SPACE). This function can be disabled using the DD command. Select Setup/
System Signals and type DD on the Commands line.
Return to the previous block by pressing [PREV] or pointing to [ESC] on the
operator panel.
By selecting Print signal for block 990 it is possible to print the current content in
the alarm list.
Symbol Status
* Active, Unacknowledged
$ Inactive, Unacknowledged
- Active, Acknowledged
<blank> Inactive, Acknowledged
Display format Explanation
S The time when the alarm was activated. The time the alarm was
first activated is shown for repeated alarms.
E The time when the alarm was inactivated. The time the alarm was
last inactive is shown for repeated alarms.
A The time when the alarm was acknowledged.