2. Development method
Phase 0: Control system structure
From the control system structure, define:
- the communication protocol used by the terminal,
- the list of equipment items accessible to the terminal.
Phase 1: Commands from the terminal to the control system
For each command from the terminal to the control system, define the operator’s action mode:
- static function key,
- dynamic function key (define the associated application page).
Phase 2: Commands from the control system to the terminal
Define all the actions performed from the control system to the terminal:
- page call-up by the PLC,
- display of LEDs,
- key locking,
- triggering of curve plotting, etc.
Phase 3: Design of pages
Based on the requirements, design all the pages mentioning for each of them:
- the purpose,
- the type (application, recipe, alarm, help, printout forms),
- the data to be processed.
Phase 4: Dialog table
Phases 0 to 3 are used to determine all the words - exclusive of any other words - which are necessary for the dialog table.
B - 6 Graphic Magelis
