Operation during power failure

It stops during execution. More Details >>

Compatibility between the A series modules and Q series modules

When an ACPU module is replaced with a QCPU module, programs for the ACPU module can be used by changing the PLC type in GX Developer. However, the programs ... More Details >>

How to launch GX Works2 or other tools after installing iQ Works

The tools can be launched individually. More Details >>

Intelligent function module settings in GX Works2

Modules do not need setting in GX Works2 if not selectable from "Module Selection" in the "New Module" window for intelligent function module settings. More Details >>

Print settings of the device list in GX Works2

When [Display Option] -> [Used devices] -> [Contact] and [Coil] are selected in the Device List window, devices used are not displayed. More Details >>

Clock function accuracy

It means that in an ambient temperature of 25 degrees Celsius, an error per day falls within the range of "delay of 2.57s" to "advance of 5.27s". "TYP.+2.22... More Details >>

QnA-compatible 3E frame command (0406) for the built-in Ethernet port QCPU

The built-in Ethernet port QCPU is not compatible with a multiple-block batch read command (0406) of the MC protocol. Executable commands are the following.... More Details >>

How to prevent unauthorized access to MELSEC iQ-R series CPU modules via a network

The MELSEC iQ-R series CPU module has "IP filter function" and "remote password function" as security functions. With the "IP filter function", you can set ... More Details >>

Regarding changing the current value of the high-speed counter.

To rewrite the current value, arbitrary values can be written using the DHCMOV instruction. (Example) Set the current value of the high-speed counter ch1 ... More Details >>

Input wiring (FX3 series)

For the sink input, the "S/S" terminal and the "24V" terminal are needed to be short-circuited. More Details >>