Remedies for WDT errors on a MELSECNET/H board

The error code indicates a WDT (watchdog timer) error. It is determined as the cause that the MELSECNET/H driver cannot work due to a computer or OS hang, or... 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 >>

Conversion speed of L60DA4

The conversion speed is 20 microseconds per channel. More Details >>

Difference in specifications between "AJ65BT" and "AJ65SBT" in CC-Link remote I/O modules' model names

"[ ]" in the CC-Link remote I/O modules' model name "AJ65[ ]BT" represents as follows: - None: Standard type - S: Compact type - F: Low profile waterpro... More Details >>

Sample comments for special relays/registers

Files are stored as sample comments when GX Developer is installed. Read a comment from the project data of sample comments to a user project and copy a port... More Details >>

How to check devices assigned to labels of GX Works3

GX Works3 and the MELSEC iQ-R series do not use actual devices as automatic assignment devices of local labels. The local labels use "label areas" in the "d... More Details >>

Arranging the PLC memory

This occurs when the specified memory does not have consecutive free space in it. In this case, delete unnecessary files or arrange the PLC memory. Select ... More Details >>

Processing time of when multiple programs are executed with a MELSEC iQ-R series CPU module

When multiple programs are executed, the processing time (program switching time) becomes "Number of program files × 0.9 [us]". More Details >>

I cannot place a main base unit in a module configuration diagram with GX Works3.

You may have already placed a main base unit in the module configuration diagram. Scroll up or down in the module configuration diagram and check if a main ... More Details >>

Difference between networks called CC-Link and those called MELSEC

CC-Link IE, supported by the CC-Link Partner Association, is an open field network standard that integrates networks, from a controller network to field/moti... More Details >>