2. Structure of the applications
Pages Types
Note
In operational phase, the terminal uses the system pages and the pages defined for the application.
System pages
Pre-configuerd by the terminal manufacturer provide:
- access to the list of pages, alarms, recipes and forms,
- access to alarm history,
- password entry,
- definition of the terminal parameters,
- definition of the protocol parameters,
- definition of the printer parameters,
- stop of printing in progress,
- access to the terminal adjustment function,
- printing of the terminal reference list.
An application can include several types of pages:
Application pages
Used to monitor system status, control, command, and control system
parameter modification ( see § 3. Application pages, Page 20
).
Alarm pages
Used to display control system fault and the corrective actions indicating with display priority (
see § 4. Alarm pages, Page 26
).
Help pages
Used to display information associated with an application or alarm page
( see § 5. Help pages, Page 30 ).
Form pages
Used to print out printout forms (
see § 6. Form pages, Page 31 ).
Form pages cannot be displayed on the terminal. They are used for printing only.
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2. Structure of the applications
Model pages:
The designer has page models at his disposal. These are background pages containing text and static graphic objects that can be used as a starting point for application page development. Three types of page models can be configured:
- Application and recipe model page
- Alarm model page
- Help model page
From the basic models, the application developer can create new models using the default basic models.
During editing of the application, alarm, or help pages, the objects of the model will appear to be greyed out and cannot be modified.
General rules to follow when configuring an application:
- A model can be used by several pages, thus the application developer will not have to create several times common objects related to those pages.
- One and only one model is associated with each page.
- A dialog application may contain several models.
- Any given model can be associated with several different pages.
- A model type (application/alarm/help model) is associated with a page type (application/alarm/help page).
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