Mitsubishi Electronics 13JW55 ユーザーズマニュアル

7 - 16

7.5.5 Exercise with the demonstration machine

(1) Sequence

program

The sequence program executes a sampling processing on analog voltages

input through CH1 of Q64AD, and then converts the analog values to digital

values.

Set the start XY of Q64AD to 80 as explained before.

Project name

Q64AD

Program name

MAIN

K4Y50

D10

BCD

Displays digital conversion value
of CH1 on LED

X8E

A/D conversion completed flag

END

D10

X80

A/D module READY

X80: Module READY signal

X8E: A/D conversion completed flag

At power-on or reset of a programmable controller CPU, this flag turns on if

A/D conversion is ready to be executed. A/D conversion is executed once this

flag turned on.

(2) Operation of the demonstration machine

Stop the CPU and click

on the toolbar.

The Online Data Operation dialog box is displayed. Click the

Parameter + Program button, then click the Execute button to write data

to the CPU. After that, activate the CPU and check the following items.

(a) Turn on X3, and change input voltages for an A/D converter module with

the volume on the demonstration machine.

Analog values that have been input to the channel 1 (CH1) of Q64AD are

stored to the buffer memory (in digital value). With the auto refresh settings,

the QCPU reads the stored digital values and stores them in its data

(b) Whenever an analog value is "-1" or smaller, 0 is set.