Mitsubishi Electronics FX3G Manual Do Utilizador

FX

3S

/FX

3G

/FX

3GC

/FX

3U

/FX

3UC

 Series

Programming Manual - Basic & Applied Instruction Edition

15 External FX I/O Device – FNC 70 to FNC 79

The number of output characters varies depending on the ON/OFF status of the special auxiliary relay M8027.
While M8027 is OFF, 8-byte serial output (fixed to 8 characters) is executed. While M8027 is ON, 16-byte serial output
(1 to 16 characters) is executed.
In the example shown below, up to 16 characters (1 character/byte) are output to the display unit (external display unit
A6FD

*1

, for example).

It is supposed that data to be displayed is stored in hexadecimal codes in D300 to D307.
1) Program

2) Connection example of the external display unit A6FD

*1

The PLC shown in the example below is the FX

2N

-16EYT (sink output) connected to the FX

3U

-32M .

*1.

A6FD was distributed only inside Japan, however, production of the external display unit A6FD was
terminated in November 2002.

3) Timing chart (while M8027 is ON)

*2.

If "H00 (NULL code)" is contained in the data (16 characters), the character just before "H00 (NULL code)" is
handled as the last character.

*3.

Cleared when the PR mode is changed from RUN to STOP.

M8027

*3

PR mode

OFF:

8-byte serial output (fixed to 8 characters)

ON:

16-byte serial output (1 to 16 characters)

X000

FNC 77

PR

M8027

D300

Y020

External display unit A6FD

*1

PLC

AC100/200V

LG

Y031 Y032

24V

D  0 D  1 D  2 D  3 D  4 D  5 D  6 D  7

Y033

COM1

Y020 Y021 Y022 Y023 Y024 Y025 Y026 Y027

COM2

Y030

STR

COM

12V

AC

AC

NC

∼

Head

character

Last

character

*2

Operation is started when X000 turns ON from OFF.

T

T

T

T: Operation cycle

or interrupt time

Drive input X000

Data Y020 to Y027

Strobe Y030

Execution flag Y031

Execution complete flag M8029