Toshiba T2N User Manual download pdf (Page 129)

3.User Program Running Control

116 PROSEC T2N

When RUN starts up, sub program #1 is run once only before the main program

is executed on the first scan. Therefore, use sub program #1 as the initial

setting program at the starting of the operation.

The first scan operation is shown in the following diagram.

When the interrupt condition is set up, the interrupt program stops other operations

and is executed immediately. As shown below, you can register one timer

interrupt program which starts up according to a cycle set up in system

information and 4 I/O interrupt programs which start up according to interrupt

signals from I/O modules with an interrupt function* (No.1 - No.4).

Interrupt program Operation

Fixed cycle

timer interrupt

Runs acording to the user specified interruption

cycle time in system information. The interruption

cycle time is set at 5 to 1,000ms (units 5ms)

I/O interrupt No.1

ž I/O interrupt No.4

I/O interrupt programs run by interrupt signals

generated from I/O modules with interrupt function*

*) I/O modules with an interrupt function is under development.

3.2

Sub program control

modemode mode transition I/O timer

Sub #1

main

first scan

RUN mode

transition

HALT mode or

system initialization

3.3

Interrupt program control

Timer interrupt cycleTimer interrupt cycle

timer

I/O #1

I/O #4

I/O #2

I/O interrupt No.4

interrupt conditions.

Fixed cycle timer interrupt

I/O interrupt No.1

scan

I/O interrupt No.2

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Toshiba T2N User Manual Page 129

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