#define FC_READ_HOLDING_REGISTERS 0x03 // Read Holding Registers #define FC_READ_INPUT_REGISTERS 0x04 // Read Input Registers #define FC_WRITE_SINGLE_COIL 0x05 // Write Single Coil #define ...
※使用にあたって、下記の使い方を推奨します。 第2回-1となる今回は、MODBUS/RTUの基礎編です。 いきなりGX Works3の設定画面 ...
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以下の構成で各RS-485機器から値を取得できるかどうか検証する。 マニュアルに従い、下記のように接続する。 電源(12V-48V ...
This article provides an overview of both protocols and discusses their key strengths and applications. It also discusses which one works best in which applications – although there is some overlap in ...
“Not being overcomplicated is Modbus TCP/IP’s biggest draw, not only for PLCs, but especially for PC-based applications,” said Jason Haldeman, senior product specialist for I/O and networking at ...