Cables connected to the Ethernet port on the universal model QCPU

If a direct connection is made, either type can be used.If making a connection via a hub, use a straight cable. 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 >>

How to check automatically assigned devices in GX Works2

Click the local label to be checked and select "Cross Reference" from the right-click menu to check the devices. More Details >>

Specifying the number of digits in the Structured Text

For actual bit devices, the number of digits can be specified. For labels, the number of digits cannot be specified. More Details >>

Detecting the number of disconnections when using QJ71E71-100

The number of disconnections detected can be checked by reading the buffer memory address 5203H (Disconnection detection count). Disconnections are detected ... More Details >>

Use of vacant terminals "∙"

Do not use vacant terminals. More Details >>

Security functions of MELSEC iQ-R series

The functions serve to protect the user property stored in a personal computer and the user property inside modules in the MELSEC iQ-R series system against... More Details >>

How to suppress the instability of digital-converted output values

(1) Use separate cables for the AC control circuit and the external input signals of an analog input module to avoid the influence of the AC side surges an... More Details >>

Opening a Structured Text program in GX Developer

Install the latest version again. Check "Structured Text (ST) Language Programming Function" and install it. More Details >>

Read and write operations for CC-Link buffer memory

There is no problem in writing/reading data into/from the buffer memory using a FROM/TO instruction with the refresh device setting left blank.The refresh de... More Details >>