Delta AS Series Programming Manual page 178

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The procedure

There are four procedures A-D, when the input counted value changes 49 -> 50 to output the pulses through Y0.0.

The input counted value changes from 49 to 50.

The high-speed comparison interrupt is triggered. The PLC program is interrupted and the high-speed

comparison interrupt is executed.

Execute instruction DPLSY that is written in the high-speed comparison interrupt.

Pulses are outputted from Y0.0.

Since the interrupt is affected by the time it is triggered and by the PLC on-going executions, such as IO points

refreshing, communication implementing and so forth, the time when the pulses to be outputted can be greatly delayed.

To improve the execution time, new SM flags are added.

SM120-SM151: To pre-store the parameters for DPLSY to output

Set the SM in this category to ON to save the DPLSY to-be-outputted parameters, including output point number, target

frequency and number of pulses to the PLC flash memory. When the high-speed comparison interrupt is triggered and

any of the SM360-391 is set to ON, the output can be started right away. Once any of SM120-151 is used, it is set to

OFF. You need to set it to ON before using it again.

SM360-SM391: To enable triggering DPLSY in the interrupt to output pulses

When the high-speed comparison interrupt is triggered and any of the SM360-391 is set to ON, the output can be started

right away to output any of the SM120-151 stored DPLSY parameters. Auto-reset the control, after the output is

The corresponding numbers of high-speed comparison interrupt to the newly added SMs are listed below.

Number of the high-

speed comparison

To pre-store the parameters for

DPLSY to output

Cha p ter 2 De vices

To enable triggering DPLSY in

the interrupt to output pulses

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