Learn MITSUBISHI-GX-WORKS with Real Code Examples

Updated Nov 26, 2025

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Code Sample Descriptions

Hello World Output in GX Works (ST)

IF X0 THEN
    Y0 := TRUE;
ELSE
    Y0 := FALSE;
END_IF;

A simple ST program that turns on Y0 when X0 is pressed.

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TON Timer Example (ST)

TON(T_1, X0, T#5s);
IF T_1.Q THEN
    Y0 := TRUE;
END_IF;

Using the Mitsubishi TON (On-Delay) timer in Structured Text.

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CTU Counter Example (ST)

CTU(C_1, X1, 10);
IF C_1.CV >= 10 THEN
    Y0 := TRUE;
END_IF;

A simple up-counter that activates Y0 after 10 pulses.

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Move Instruction (MOV)

D100 := D0;

Structured Text equivalent of MOV in GX Works.

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Analog Input Scaling (0–4000 to 0–100)

Scaled := (D0 * 100) / 4000;

Scaling Mitsubishi raw analog input range to engineering units.

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Motor Start/Stop Latch (ST)

IF X0 THEN
    M0 := TRUE;
END_IF;
IF X1 THEN
    M0 := FALSE;
END_IF;
Y0 := M0;

Classic seal-in motor circuit using X0 and X1.

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Rising Edge Detection (ST)

Prev := Curr;
Curr := X0;
R_TRIG := Curr AND NOT Prev;

Basic rising edge detection using historical bool.

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For Loop Array Sum (ST)

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + D[i];
END_FOR;

Summing 10 data registers D0–D9.

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Simple PID Call (ST)

PID(PV := D100,
    SP := D200,
    OUT => D300,
    EN := TRUE);

Calling a PID block in Mitsubishi ST.

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PWM Output Example (ST)

IF Duty > 100 THEN
    Duty := 100;
END_IF;
PWM_CH1.Duty := Duty;

Simple PWM control using a duty cycle tag.

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Code Sample Descriptions

Hello World Output in GX Works (ST)

IF X0 THEN
    Y0 := TRUE;
ELSE
    Y0 := FALSE;
END_IF;

A simple ST program that turns on Y0 when X0 is pressed.

Let’s Try →

TON Timer Example (ST)

TON(T_1, X0, T#5s);
IF T_1.Q THEN
    Y0 := TRUE;
END_IF;

Using the Mitsubishi TON (On-Delay) timer in Structured Text.

Let’s Try →

CTU Counter Example (ST)

CTU(C_1, X1, 10);
IF C_1.CV >= 10 THEN
    Y0 := TRUE;
END_IF;

A simple up-counter that activates Y0 after 10 pulses.

Let’s Try →

Move Instruction (MOV)

D100 := D0;

Structured Text equivalent of MOV in GX Works.

Let’s Try →

Analog Input Scaling (0–4000 to 0–100)

Scaled := (D0 * 100) / 4000;

Scaling Mitsubishi raw analog input range to engineering units.

Let’s Try →

Motor Start/Stop Latch (ST)

IF X0 THEN
    M0 := TRUE;
END_IF;
IF X1 THEN
    M0 := FALSE;
END_IF;
Y0 := M0;

Classic seal-in motor circuit using X0 and X1.

Let’s Try →

Rising Edge Detection (ST)

Prev := Curr;
Curr := X0;
R_TRIG := Curr AND NOT Prev;

Basic rising edge detection using historical bool.

Let’s Try →

For Loop Array Sum (ST)

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + D[i];
END_FOR;

Summing 10 data registers D0–D9.

Let’s Try →

Simple PID Call (ST)

PID(PV := D100,
    SP := D200,
    OUT => D300,
    EN := TRUE);

Calling a PID block in Mitsubishi ST.

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PWM Output Example (ST)

IF Duty > 100 THEN
    Duty := 100;
END_IF;
PWM_CH1.Duty := Duty;

Simple PWM control using a duty cycle tag.

Let’s Try →