Yaskawa Ladder Works Programming Manual Manuel d'utilisateur télécharger pdf (Page 156)

7.13 PULSE WIDTH MODULATION Instruction (PWM)

7-35

7.13 PULSE WIDTH MODULATION Instruction (PWM)

[Outline]

The PWM instruction converts the value of the Input to PWM as an input value (between -100.00 and

100.00%, with increments of 0.01%) and outputs the result to the

Output and the parameter table.

Double-length integer and real number operations are not allowed.

PWMT (X + 10000 )

Time of ON output =

20000

PWMT ( X + 10000 )

Number of ON outputs =

×20000

X : input value

Ts : scan time set value (ms)

When 100.00

％ is input : all ON

When 0

％

is input : 50

％

duty (50

％

ON)

When

－100.00％ is input : all OFF

When the PWM reset (PWMRST) is ON, all internal operations are reset and PWM operations are

performed with that instant as the starting point. After turning the power ON, set PWMRST to ON to

clear all internal operations, then use the PWM instruction.

Table of Integer Type PWM Instruction Parameters

ADR Type Symbol Name Specification I/O

0 W RLY Relay I/O Relay input, relay output *

IN/OUT

1 W PWMT PWM cycle PWM cycle (1MS) (1 to 327676ms) IN

2 W ONCNT ON output setting timer ON output setting timer (1ms) OUT

3 W CVON ON output count timer ON output count timer (1ms) OUT

4 W

CVON

REM

ON output count timer

remainder

ON output count timer remainder (0.1ms) OUT

5 W OFFCNT OFF output setting

timer

OFF output setting timer (1ms) OUT

6 W CVOFF OFF output count

timer

OFF output count timer (1ms) OUT

7 W

CVOFF

REM

OFF output count

timer remainder

OFF output count timer remainder (0.1ms) OUT

: Relay I/O Bit Assignment

BIT Symbol Name Specification I/O

0 PWM

RST

PWM reset "ON" is input when PWM is reset IN

2 to 7

－

(Reserve) Reserve relay for input IN

8 PWM

OUT

PWM output PWM is output

(two-value output: ON = 1, OFF = 0)

OUT

9 to F

－

(Reserve) Reserve relay for output OUT

[Format]

Symbol : PWM

Full Name : Pulse Width Modulation

Category : DDC

Icon :

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Yaskawa Ladder Works Programming Manual Manuel d'utilisateur Page 156

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