Using Q series terminal blocks and connectors with MELSEC iQ-R series modules

You can use a Q series 18-point screw terminal block with a MELSEC iQ-R series terminal block type I/O module or analog module. For a 40-pin connector type ... More Details >>

IP filter function of MELSEC iQ-R series CPU modules

You can set IP addresses accessible to the CPU module and prevent unauthorized access to the CPU module. <Setting the IP filter function> [Navigati... 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 >>

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 >>

Combination of the MELSEC iQ-R series inter-module synchronization function and the fixed scan communication of the multiple CPU system function

You can synchronize the fixed scan communication cycle of the multiple CPU system function with the inter-module synchronization cycle of the inter-module s... More Details >>

Database function of the MELSEC iQ-R series

You can manage tabular data including product information and production information as a database in a programmable controller. By accessing the database w... More Details >>

Number of modules that can be synchronized using the MELSEC iQ-R series inter-module synchronization function

The number of modules that can be synchronized is as follows. - In single CPU system configuration: 64 modules - In multiple CPU system configuration: 57 t... More Details >>

How to display the parameter setting window for a programmable controller with GX Works3

You can display the setting window from a module configuration diagram or system parameters. <Displaying the setting window from a module configuration... More Details >>

Overhead time before and after the startup of an interrupt program with a MELSEC iQ-R series CPU module

Although it depends on interrupt factors, the overhead time before startup becomes 10.8 to 23.8 [us] and the time after startup becomes 6.5 to 17.4 [us]. More Details >>

Digit specification for bit devices in ST language with GX Works3

For a label where digits are to be specified, set a bit type array as its data type. The following shows an example of when a global label is used. - Globa... More Details >>