A message that says "A T/C coil with the same No. exists."

It is a confirmation message telling a user that there is a device, T or C, that has become a duplicated coil in the same program and the coil is given the s... More Details >>

Simultaneous use of auto logging and backup functions

The auto logging function and backup function cannot be used simultaneously. The backup function must be used after the logging function is stopped. (A singl... More Details >>

CPU built-in I/O function

They can be used simultaneously when I/O signals are not overlapped. The overlap of signals are checked automatically when a user select functions in the bui... More Details >>

Whether or not device indirect specifications in structured ladder programs are allowed

Indirect specifications with "＠" cannot be used in structured ladder programs and the Structured Text. Use indirect specifications in a ladder language program. More Details >>

Cross cable connections

We do not guarantee the operation of a system that involves cross cable connections. More Details >>

How to read comments in the standard ROM with GX Works2

Select [Target Memory] -> [Standard ROM] in the Read from PLC window. More Details >>

Open setting of the built-in Ethernet port QCPU

No.It is necessary to configure one port to use the MELSOFT connection. More Details >>

Creating comments both in English and in Japanese

Create global device comments and local device comments in respective languages.The device comments can be switched in [Options] -> [Tool]. More Details >>

Memory allocation for online change

The scan time may be substantially longer. Continue the operation if there is no problem with the longer scan time. 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 >>