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Understanding OIS .eatures
22.
Bitmaps:
Stationary bitmaps can be placed on the screen. 256 color Bitmaps can be added to the screen.
4.2
Alarms
Any tag can be continuously monitored by defining alarms for each bit of that tag. To display an alarm on
the screen as soon as it is triggered, alarm object has to be placed on the screen. An alarm is triggered
for each bit in a tag. If the value of the particular tag becomes nonzero, corresponding alarm is displayed
in the alarm object. 16 alarms can be defined in Alpha-Numeric OIS model. OIS stores the alarm
information in an alarm container. Triggered alarms are stored in a container. First triggered alarm is on
the top of the container. New alarm is added from the bottom of the container. Operator has to acknowl-
edge each alarm by using any key with definition 'Acknowledge Alarm'. When alarm condition is cleared
and the alarm is acknowledged, the alarm is deleted from the container. Alarm can also be printed on the
serial port. Printing is performed as soon as the alarm is triggered.
Consecutive Alarms: This type of alarms are useful when user has to monitor a sequence of tags.
Discrete Alarms: Discrete alarms can be useful when user wants to monitor tags which are not in a
sequence, i.e. tag is discrete.
An alarm is defined for each bit of tag. When any bit of any tags is found to be on ('1') corresponding
alarm is triggered. Triggered alarm is displayed in the alarm object. User should define a key to acknowl-
edge alarms. User can also scroll through the table of alarms using keys defined as 'Next Alarm' and
'Previous Alarm'. Acknowledged and Inactive alarm is deleted from the container. New alarm is added to
the bottom of the container. The alarm container has the capacity to store 64 alarms. Total 256 alarms
can be defined.
To display alarm user must follow steps given below:
1.
Define consecutive or discrete alarms from 'Define Alarm' window. Definition contains the
alarm text and print selection.
2.
In Screen Definition, place Alarm object on the appropriate location on the appropriate
screen.
3.
Edit the alarms window to select alarm fields and their length.
Alarm will be displayed IF the screen containing an alarm object is displayed. If the current screen does
not have an alarm object, alarms WILL NOT be displayed.
4.3
Application Task-List
Application task-list allows user to define tasks to be performed after unit is powered on while application
is running. Application task-lists are of two types:
1.
Power-on tasks:
Power-on tasks are performed after OIS60 unit is powered on. These tasks are like a boot sequence for
OIS60 which are performed only once. Using these tasks user can initialize some registers, Goto a
particular screen after power up etc. Please note that user MUST define 'Goto Screen' Task in power-On
task list.
2.
Global tasks:
Global tasks are performed regularly till the application is in progress. These tasks are useful when the
user wants to perform some tasks repeatedly. In case the PLC is not connected then PLC related tasks
will not be performed.
Types of Application Tasks:
1.
2.
Goto Screen
Goto Next Screen
Page 20
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