描述
三菱QJ71C24系列是针对Q系列PLC设计的高性能串行通信模块，支持RS-232/RS-422/RS-485接口，广泛应用于工业自动化系统的数据传输与设备互联。以下是其核心功能与技术参数的综合概述：
一、核心功能
多协议通信支持
-支持MC协议、无顺序协议、双向协议等多种工业通信协议，兼容三菱PLC与外部设备（如变频器、传感器、HMI）的数据交换。
-支持Modbus RTU等通用协议，通过配置可实现与非三菱设备的互联互通。
高传输性能
-传输速率：最高可达230.4kbps（RS-422/485接口），CH1支持230.4kbps，CH2最高115.2kbps，满足实时性要求高的场景。
-传输距离：RS-232最大15米，RS-422/485最大1200米（多点网络），支持1:1、1:n、m:n等拓扑结构。
智能I/O占用
-单模块占用32点智能I/O地址，可灵活分配至PLC程序中，减少资源占用。
二、接口与电气特性
物理接口
-RS-232接口：D-Sub 9P标准连接器，适用于点对点通信。
-RS-422/485接口：双片嵌入式端子排设计，支持全双工/半双工模式，兼容多设备组网。
-扩展型号差异：例如QJ71C24N-R4支持2个RS-422/485接口，而QJ71C24N-R2为2个RS-232接口。
电源与功耗
-工作电压：DC5V（来自PLC基板）或外部24V电源，内部电流消耗≤0.31A。
-具备浪涌保护与短路保护功能，提高系统可靠性。
三、数据传输与协议配置
数据格式与校验
-数据位：7/8位可选
-停止位：1/2位可选
-校验方式：奇偶校验（垂直奇偶）、和校验（MC协议/双向协议）或无校验，可根据协议需求设置。
通信控制
-支持Xon/Xoff流控（DC1/DC3）、RS/CS控制、DTR/DSR信号等，确保数据传输的稳定性和灵活性。
四、安全与诊断特性
安全防护
-配置互锁回路功能，防止远程控制时的误操作风险。
-闪存ROM写入次数高达10万次，数据存储更可靠。
故障诊断
-模块自带LED指示灯，实时显示通信状态（收发指示灯闪烁）。
-支持线路跟踪功能，可捕捉异常报文并分析通信错误。
81001-450-53-R
81001-450-53-R
Mitsubishi QJ71C24 series is a high-performance serial communication module designed for Q series PLC,supporting RS-232/RS-422/RS-485 interfaces,and is widely used in data transmission and equipment interconnection in industrial automation systems.The following is a comprehensive overview of its core functions and technical parameters:
1.Core functions
Multi-protocol communication support
-Supports multiple industrial communication protocols such as MC protocol,non-sequential protocol,bidirectional protocol,etc.,and is compatible with data exchange between Mitsubishi PLC and external devices(such as inverters,sensors,HMI).
-Supports general protocols such as Modbus RTU,and can be configured to achieve interconnection with non-Mitsubishi devices.
High transmission performance
-Transmission rate:up to 230.4kbps(RS-422/485 interface),CH1 supports 230.4kbps,CH2 up to 115.2kbps,meeting scenarios with high real-time requirements.
-Transmission distance:RS-232 up to 15 meters,RS-422/485 up to 1200 meters(multi-point network),supports 1:1,1:n,m:n and other topologies.
Intelligent I/O occupation
-A single module occupies 32 intelligent I/O addresses,which can be flexibly allocated to the PLC program to reduce resource occupation.
2.Interface and electrical characteristics
Physical interface
-RS-232 interface:D-Sub 9P standard connector,suitable for point-to-point communication.
-RS-422/485 interface:dual-chip embedded terminal block design,supports full-duplex/half-duplex mode,and is compatible with multi-device networking.
-Extended model differences:For example,QJ71C24N-R4 supports 2 RS-422/485 interfaces,while QJ71C24N-R2 is 2 RS-232 interfaces.
Power supply and power consumption
-Working voltage:DC5V(from PLC substrate)or external 24V power supply,internal current consumption≤0.31A.
-With surge protection and short circuit protection functions to improve system reliability.
III.Data transmission and protocol configuration
Data format and check
-Data bit:7/8 bits optional
-Stop bit:1/2 bits optional
-Check mode:parity check(vertical parity),sum check(MC protocol/bidirectional protocol)or no check,which can be set according to protocol requirements.
Communication control
-Support Xon/Xoff flow control(DC1/DC3),RS/CS control,DTR/DSR signal,etc.to ensure the stability and flexibility of data transmission.
IV.Safety and diagnostic features
Safety protection
-Configure interlocking loop function to prevent the risk of misoperation during remote control.
-The flash ROM can be written up to 100,000 times,and data storage is more reliable.
Fault diagnosis
-The module has its own LED indicator to display the communication status in real time(the transmit and receive indicator flashes).
-Support line tracing function to capture abnormal messages and analyze communication errors.
