Turning on a bit in the data register

In the FX3U/FX3UC series, the bit specification of the data register is possible. (Example) D0.7→7th bit in D0 For the other types of MELSEC-F programmable... More Details >>

Operation processing time of the prog...

The constant operation processing time can be achieved by using constant scan mode. Refer to the programming manual of the programmable controller used. More Details >>

Index modifier of bit devices in the ...

The FX3G series does not support the index modifier for the bit devices. The FX3U/FX3UC series supports this function. More Details >>

Communication format setting

The communication format can be set in the communication setting of a sequence program or "PLC Parameter setting" using GX Developer. To avoid setting troub... More Details >>

Distinguishing the usage of standard ...

Standard counters offer counting up to 10Hz. For high-speed input signals which exceed 10Hz, use high-speed counters,interruption function, or another proce... More Details >>

Data backup failure

If the OUT instruction using the device number of the latch target device exists in a sequence program, the latched data may be overwritten by execution of t... More Details >>

Duplicated coil errors that can be ch...

When an SET instruction and RST instruction use a single device, no duplicated coil error is detected. More Details >>

List of registers assigned to the lab...

To display a list of registers assigned to labels, check [Find Label Definition] and [Display all items] in the [Condition Setting] tab in the [Cross Refere... More Details >>

Behavior of special relay in offline ...

The constant scan initial value of GX Simulator is 100 ms. Thus, the value of SM410(0.1sec. clock) is OFF in each scan. To turn ON/OFF SM410, set the consta... More Details >>

Writing LJ71C24 modules' parameters u...

The switch setting is written when CPU module's parameters are written. The settings of "Various Control Specifications" are written when intelligent functio... More Details >>