Command in-position

Refer to "b2: Command in-position flag" of "[Md.31] Status". More Details >>

OUT instruction

Both OUT and SET instructions set the device by completion of condition.However, if not completion of condition, OUT instruction resets the device while SET ... More Details >>

Receiving back (echoing back) the same data sent from QJ71C24N

When data is sent from the RS-422/485 interface through RS-485 (2-wire type) communication and the same data comes back to RDA or RDB, we call it echo back. ... More Details >>

Terminating resistors for RS-485 communication of QJ71C24N

The resistance value is 110 ohm, 1/2 W. More Details >>

I cannot convert a circuit created with GX Developer.

When the conversion is executed, online change is automatically executed.When the online change at the upper right section of the setting in "Options" of "To... More Details >>

I cannot select [Transfer Setup] in GX Developer because it is displayed in gray.

You cannot select the item while the programmable controller is being monitored. Execute [Close all windows] of [Window] from the tool bar, and check if Tra... More Details >>

Displaying devices in GX Works2

Yes. The device use list also displays the devices used for specifying digits, such as "K4M0" (including M1, M2, or others). More Details >>

How to check errors with error codes of QD75

Errors can be checked with the following error detection signals and buffer memory areas corresponding to each axis.- Axis 1 Error detection X8 Buffer memor... More Details >>

Fixed scan execution type (program setting item)

A fixed scan execution type program is a program executed at specified time intervals. This type of programs, unlike interrupt programs, can be interrupted i... More Details >>

Memory allocation for online change in GX Developer

Select [Online] -> [Write to PLC] on the menu of GX Developer, open the [File selection] tab, and press "Param + Prog" button. Then open the [Program] ta... More Details >>