Phase 0: Control system structure. Schneider Electric XBTF / TXBTF Graphic terminals (Tome 2)

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