Programmable controllers with no battery (MELSEC-F)

A battery is used for backing up program memory and latched device data and maintaining clock operation in the event of a power failure. The FX3S/FX3G/FX3G... More Details >>

How to ground programmable controllers

For your safety, programmable controllers must be grounded. Incomplete common grounding within the control panel or common grounding with heavy electrical s... More Details >>

Regarding the digital output of the built-in analog function

It is possible by setting the scaling function or shift function from the parameter settings. More Details >>

Overhead time of when a fixed scan execution type program of the MELSEC iQ-R series CPU module is executed

When the block number of the file register (R) is saved and stored, the overhead time becomes 35.9 [us]. When the number of the file register is not saved o... More Details >>

How to check scan time

SD520 stores the current scan time in 1 ms units. More Details >>

Setting of Q series registers whose data is held when a power failure occurs

Assign data registers (D) to Latch (1) or Latch (2) in the "Device Setting" window ([PLC Parameter] -> "Device Setting" window) to hold the data when a po... More Details >>

How to set a value in SM414(2n second clock)

Set a value in the special register SD414.Use a MOV instruction to set the value in SD414. More Details >>

Fixed buffer data area

The fixed buffer data areas in the buffer memory are used for communication for FROM/TO instructions. The areas used in communication for FROM/TO instruction... More Details >>

Operation during power failure

It stops during execution. More Details >>

SD1286 of LCPU with built-in Ethernet port

The bits 0 to F of the special register SD1286 (Receive state signal) correspond to the connection numbers 1 to 16. When it receives data, the corresponding ... More Details >>