MELSOFT Library

Sample ladder for distribution measuring instrument with RS-485 communication (MODBUS RTU protocol) (English version)

This program is sample ladder for a system where the MELSEC iQ-F series FX5U/FX5UC CPU module is connected to power distribution measuring instruments with RS-485 communication (MODBUS RTU protocol) (hereafter "power distribution measuring instruments").

Applicable module Applicable model
Energy measurement module (EcoMonitorLight) EMU4-BD1-MB, EMU4-HD1-MB
Energy measurement module (EcoMonitorPlus) EMU4-BM1-MB, EMU4-HM1-MB, EMU4-LG1-MB, EMU4-A2, EMU4-VA2, EMU4-AX4, EMU4-PX4
Electronic multiple indicator ME110SSR-MB
Engineering tool File name Size Last update Version
GX Works3 gx3_ld-fx5_e-measure-mb_v100a_e.zip 8,115,896 bytes Apr. 7, 2017 1.00A
Relevant manual Type
JY997D74501-A MELSEC iQ-F
Sample Ladder Reference for FX5 and Power Distribution Measuring Instrument with RS-485 Communication (MODBUS RTU Protocol)
Project name Function name Description Ver.
LD-FX5U_e-MEASURE-MB_V100A_J.gx3 01_Data Read Reads measurement data from a distribution measurement instrument. 1.00A
02_Data Write Writes the setting value to the distribution measurement instrument. 1.00A


[How to extract the compressed file]

Copy the file to a folder.
The file is a compressed file in ZIP format.

Decompression method 1): For the OS with the ZIP-compatible decompression function

  1. Right-click the copied file.
  2. Select "Extract All...".
    When "Extract All..." is not displayed, follow the decompression method 2).
  3. Specify the location of the extracted file, and click the "Extract" button to start the decompression.

Decompression method 2): For the OS without the ZIP-compatible decompression function

  1. If not having the ZIP-compatible decompression tool, acquire the decompressing tool.
  2. Decompress the file using the decompression tool.

* Use the decompression tool at users' own risk.


[Precautions for using the sample ladder]

  1. Before applying the sample ladder to a system, check sufficiently if no problem occurs in the control of the system.