Learn OMRON-CX-PROGRAMMER with Real Code Examples

Updated Nov 26, 2025

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Code Sample Descriptions

Simple Output Control (ST)

IF CIO100 THEN
    CIO000 := TRUE;
ELSE
    CIO000 := FALSE;
END_IF;

Turns output CIO 0.00 ON when input CIO 1.00 is TRUE.

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TON On-Delay Timer (TIMX Equivalent)

TIMX_1(IN := CIO101, PT := T#5s);
IF TIMX_1.Q THEN
    CIO001 := TRUE;
END_IF;

Starts a 5-second timer and turns ON an output when done.

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CTU Up Counter (CNT)

CTU_1(CU := CIO102, PV := 10);
IF CTU_1.CV >= 10 THEN
    CIO002 := TRUE;
END_IF;

Counts rising edges on CIO 1.02. Turns ON CIO 0.02 at 10 counts.

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Move Instruction (MOV Equivalent)

D200 := D100;

Moves D100 into D200.

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Analog Scaling (0–4000 -> 0–100%)

Scaled := (REAL(D300) * 100.0) / 4000.0;

Omron analog input scaling example.

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Motor Start/Stop Seal Circuit (ST)

IF CIO103 THEN
    M_Start := TRUE;
END_IF;
IF CIO104 THEN
    M_Start := FALSE;
END_IF;
CIO003 := M_Start;

Start button CIO 1.03, Stop button CIO 1.04, output latch at CIO 0.03.

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Rising Edge Detection (Differentiation UP)

R_TRIG_1(CLK := CIO105);
IF R_TRIG_1.Q THEN
    CIO004 := TRUE;
END_IF;

Detects positive edge on CIO 1.05.

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FOR Loop Summing Registers

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + D[i];
END_FOR;
D50 := Sum;

Sum values from D0 to D9 into D50.

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PIDAT Block Example (Omron PID)

PIDAT_1(
    PV := D600,
    SP := D610,
    KP := 1.0,
    TI := 2.0,
    TD := 0.0,
    OUT => D620
);

Basic PID instruction block for Omron PLC.

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Simple PWM Output (ST Logic)

IF Ramp >= 100 THEN
    Ramp := 0;
END_IF;
IF Ramp < Duty THEN
    CIO005 := TRUE;
ELSE
    CIO005 := FALSE;
END_IF;
Ramp := Ramp + 1;

Generates PWM on CIO 0.05 using a ramp counter.

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Code Sample Descriptions

Simple Output Control (ST)

IF CIO100 THEN
    CIO000 := TRUE;
ELSE
    CIO000 := FALSE;
END_IF;

Turns output CIO 0.00 ON when input CIO 1.00 is TRUE.

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TON On-Delay Timer (TIMX Equivalent)

TIMX_1(IN := CIO101, PT := T#5s);
IF TIMX_1.Q THEN
    CIO001 := TRUE;
END_IF;

Starts a 5-second timer and turns ON an output when done.

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CTU Up Counter (CNT)

CTU_1(CU := CIO102, PV := 10);
IF CTU_1.CV >= 10 THEN
    CIO002 := TRUE;
END_IF;

Counts rising edges on CIO 1.02. Turns ON CIO 0.02 at 10 counts.

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Move Instruction (MOV Equivalent)

D200 := D100;

Moves D100 into D200.

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Analog Scaling (0–4000 -> 0–100%)

Scaled := (REAL(D300) * 100.0) / 4000.0;

Omron analog input scaling example.

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Motor Start/Stop Seal Circuit (ST)

IF CIO103 THEN
    M_Start := TRUE;
END_IF;
IF CIO104 THEN
    M_Start := FALSE;
END_IF;
CIO003 := M_Start;

Start button CIO 1.03, Stop button CIO 1.04, output latch at CIO 0.03.

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Rising Edge Detection (Differentiation UP)

R_TRIG_1(CLK := CIO105);
IF R_TRIG_1.Q THEN
    CIO004 := TRUE;
END_IF;

Detects positive edge on CIO 1.05.

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FOR Loop Summing Registers

Sum := 0;
FOR i := 0 TO 9 DO
    Sum := Sum + D[i];
END_FOR;
D50 := Sum;

Sum values from D0 to D9 into D50.

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PIDAT Block Example (Omron PID)

PIDAT_1(
    PV := D600,
    SP := D610,
    KP := 1.0,
    TI := 2.0,
    TD := 0.0,
    OUT => D620
);

Basic PID instruction block for Omron PLC.

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Simple PWM Output (ST Logic)

IF Ramp >= 100 THEN
    Ramp := 0;
END_IF;
IF Ramp < Duty THEN
    CIO005 := TRUE;
ELSE
    CIO005 := FALSE;
END_IF;
Ramp := Ramp + 1;

Generates PWM on CIO 0.05 using a ramp counter.

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