Maple Systems OIT Family - Manual (Page 37)

NOTE:The Acknowledge Alarm status coil can be monitored by the PLC to determine when
normal operation can begin again. It is the PLC’s responsibility to clear this coil after
the OIT sets it.
Each alarm screen needs an alarm priority to determine the order in which the alarm is
placed into the alarm stack. The alarm stack is internal to the OIT and is used to store
alarms when alarm conditions occur faster than the OIT operator can respond. The alarm
stack continuously reorders new alarms by placing the highest priority alarms at the top of
the stack—priority 1, followed by priority 2, priority 3, and priority 4. As each alarm is
displayed, it is removed from the stack. In this manner, alarms which are more important
than others can be given a higher priority to ensure that they are seen by the OIT operator
first. The alarm stack holds a maximum of 10 alarms. When full, older alarms of lesser or
equal priority are removed from the alarm stack as the PLC requests new alarms.
To create an alarm screen:
1. In the Screen Type group box, select the Alarm option button.
2. In the Alarms group box, select the appropriate Priority option button.
3. In the Alarms group box, in the Type drop down list box, select the audible alert type.
4.
In the Screen Editor, enter the text to be displayed.
5. In the Screen Editor, insert any necessary PLC Register Monitors. For more
information on embedding PLC Register Monitors, refer to CHAPTER 4: PLC
Register Monitors.
6. Configure any screen features (blinking, etc.) you want to use. For more information on
configuring the available screen features, refer to the Screen Features section in this chapter.
Menu Screens
Menu screens allow the OIT operator to branch off to other message, recipe, or menu
screens by pressing the associated numeric key. Each menu screen can branch to as many
as nine other screens using the 1 through 9 keys.
Stored Screens 37
1010-0099, Rev. 07
2 3 4 6 5 7 8 MESSAGE ALARM RUN PRINT 1
0
7
4
8
5
1 2
9
6
3
. PAGE
ACK
ALARM
DOWN
MESSAGE
PAGE
UP
NEXT
LAST
MESSAGE
TOGGLE HELP
SETUP
PRINT
SCREEN
DELETE
CLEAR
E
N
T
E
R
F1 F5 F9
F2 F6 F10
F3 F7 F11
F4 F8 F12
Caution!
Bottle not capped!
Caution!
Diverted offline.
Alarm #31