Mitsubishi Electronics FX3G User Manual

816

/FX

3GC

/FX

3UC

Series

Programming Manual - Basic & Applied Instruction Edition

36 Interrupt Function and Pulse Catch Function

36.5 Timer Interrupt (Interrupt in Constant Cycle)

2. Timer interrupt processing of RAMP (FNC 67) instruction

The ramp signal output circuit shown below is programmed using the timer interrupt function executed every 10 ms.

→ For the use method of the instruction execution complete flag M8029, refer to Subsection 6.5.2.

→ For RAMP (FNC 67) instruction, refer to Section 14.8.

1) Ramp output pattern

D4 is occupied as a register for counting the number of times of execution.

2) Program

(D 1) = 1

(D 3)

(D 2) = 255

X000 = ON

M8029

Execution is completed

While M8026 is OFF
10 sec.

While M8026 is ON

X000

Start

FNC 04

FNC 12

MOV

K 1

D 1

FNC 12

MOV

K255

D 2

PLS

M 0

SET

M 1

FNC 06

FEND

M 1

FNC 67

RAMP

D 1

D 2

D 3 K1000

Initial

value

Target

value

Current

value

Number of

times of

transfer

M 1

M8029

FNC 03

IRET

END

I610

M8026

Interrupt

pointer

Step

When interrupt is given every 10 ms

RST

Interrupts are enabled by EI instruction.

The main program is described.
With M8026 turned ON, when the value of

(D3) reaches the final value (D2), the final

value is latched.

As soon as the start command is given, the

initial value (D1) and target value (D2) are

transferred.

The main program is finished by FEND

instruction.

While the instruction is executed 1000

times (in 10 seconds), the contents of D3

are changed from the value of D1 to the

value of D2.

When the instruction execution complete

flag M8029 turns ON, RAMP instruction

drive input is set to OFF.

If RAMP (FNC 67) instruction is

continuously executed while M8026 is OFF,

the value of D3 returns to the initial value

(D1) immediately after it reaches the final

value (D2), and then the same operation is

repeated.

This program is not necessary when M8026

is ON.