OPERATION MANUAL

CS-series Features Section 1-2
4
When a new program is being created, standard programs can be combined
as tasks to create an entire program.
Standard programs
Using Symbols Arbitrary symbols (names up to 32 characters) that are independent of I/O terminal
allocations can be used in programming. Standard programs created
with symbols are more general and easier to reuse as tasks in different programs.
Global and Local Symbols
Supported
Improve Overall System
Response Performance
Simplify Program Modification
Earlier program
Program ABC
Task 1 (A)
Task 2 (B)
Task 3 (C)
Program ABD
Task 1 (A)
Task 2 (B)
Task 3 (D)
I/O names are handled as symbols which can be defined as global symbols,
which apply to all of the programs in all tasks, or as local symbols, which apply
to just the local task.
When the symbols are defined, you can choose to have the local symbols
allocated to addresses automatically.
The response performance of the system can be improved by dividing the
program into a system-management task and tasks used for control and executing
only those control tasks that need to be executed.
Task
Task
Task
Task
Symbols specified for bit address:
SW1 VALVE
Debugging is more efficient when the job of modifying and debugging the
tasks can be divided among several individuals.
Program maintenance is easier because only the tasks affected by
changes have to be modified when there are changes (such as changes
in specifications).
Several consecutive program lines can be modified with online editing.
The amount the cycle time is extended during online editing has been
reduced.