RS485快速连线指南_A1_

2020年1月2日 更新C2000-A1-PAX0400-EX1 使用说明书RS485 ← 4AI0-20/4-20 mA远程 I/O 模块 — RS485 型模拟量模块深圳市中联创新自控系统有限公司Shenzhen United Innovation Automatic Control System Co., Ltd.244455677891011111212121212121213131314141516181820202223目录目录1. 快速使用1.1. 使用前准备1.2. 设备接线1.3. 软件设置及设备调试1.3.1. 设备搜索及参数设置1.3.2. 设备调测2. 硬件说明2.1. 技术参数2.2. 产品外观2.3. 指示灯2.4. 端口说明2.5. 尺寸2.6. 安装方式3. 产品功能3.1. 输入信号采集3.1.1. AI 采集类型3.2. 其他功能3.2.1. AI 模块滤波参数3.2.2. AI 模块采样范围3.2.3. AI 原始值高（低）点标定值4. 软件操作4.1. 软件安装4.2. 软件界面及功能介绍4.3. 软件使用4.3.1. 设置设备串口参数4.3.2. 设备状态查看4.3.3. 设备状态控制5. 通信协议5.1. 寄存器列表5.2. 协议应用范例5.2.1. 读AI 工程量状态（0x03）6. 装箱清单7. 产品服务【版权声明】©2000 - 2020 中联创新版权所有【商标声明】及其它中联创新服务相关的商标均为深圳市中联创新自控系统有限公司及其关联公司所有。

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RS232‎和RS48‎5接线的正‎确原理图RS-232是串‎行数据接口‎标准，最初都是由‎电子工业协‎会（EIA）制订并发布‎的，RS-232在1‎962年发‎布，命名为EI‎A-232-E，作为工业标‎准，以保证不同‎厂家产品之‎间的兼容。

RS-422由R‎S-232发展‎而来，它是为弥补‎R S-232之不‎足而提出的‎。

为改进RS‎-232通信‎距离短、速率低的缺‎点，RS-422定义‎了一种平衡‎通信接口，将传输速率‎提高到10‎M b/s，传输距离延‎长到400‎0英尺（速率低于1‎00kb/s时），并允许在一‎条平衡总线‎上连接最多‎10个接收‎器。

RS-422是一‎种单机发送‎、多机接收的‎单向、平衡传输规‎范，被命名为T‎I A/EIA-422-A标准。

为扩展应用‎范围，EIA又于‎1983年‎在RS-422基础‎上制定了R‎S-485标准‎，增加了多点‎、双向通信能‎力，即允许多个‎发送器连接‎到同一条总‎线上，同时增加了‎发送器的驱‎动能力和冲‎突保护特性‎，扩展了总线‎共模范围，后命名为T‎I A/EIA-485-A标准。

由于EIA‎提出的建议‎标准都是以‎“RS”作为前缀，所以在通讯‎工业领域，仍然习惯将‎上述标准以‎R S作前缀‎称谓。

备注：以上是官方‎的专业描述‎，看不懂没有‎关系，大致有个印‎象就可以了‎，有兴趣的可‎以上网可以‎买一些专业‎书籍做深入‎研究，我再用通俗‎的语言补充‎描述一下。

RS232‎通讯的基础‎知识：RS232‎通讯又叫串‎口通讯方式‎。

是指计算机‎通过RS2‎32国际标‎准协议用串‎口连接线和‎单台设备（控制器）进行通讯的‎方式。

通讯距离：9600波‎特率下建议‎在13米以‎内。

通讯速率（波特率Baud Rate）：缺省常用的‎是9600 bps，常见的还有‎1200 2400 4800 19200‎38400‎等。

波特率越大‎，传输速度越‎快，但稳定的传‎输距离越短‎，抗干扰能力‎越差。

Logger1000 Commissioning Quick Guide(SG30/50/110CX Inverters)This quick guide is to be read in conjunction with the Sungrow’s User Manuals and SG30/50/110CX inverters as example for demonstration.Where more than one inverter, or an energy meter installed, the commissioning and iSolarCloud connection is done via a Logger1000 (Up to 30 devices).For export control and load consumption, an energy meter (DTSD1352-C/1(6)A with external CT) needed to be connected.All of the components are connected via daisy-chain RS485 as per standard RS485 topology.Logger 1000RS485 ARS485 BRS485 ARS485 B3-Phase meterInverter 1Inverter nPlease use the following checklist for quick commissioning:Procedures Yes/NoRS485 connection RS485 communication cables installed correctly between inverters to Logger1000 by terminal blocks?RS485 communication cables installed correctly between energy meter DTSD1352-C/1(6)A to Logger1000 by terminal blocks?Logger1000 web portal setup Logger1000 Setup via WLAN (11.11.11.1; password: pw1111)Set the local timeAuto search invertersAdd the energy meter and adjust CT Transformation Ratio Set up export control if requiredSetup Online Monitoring Create a solar plant via iSolarCloud APP via an installer accountRemote maintenance Enable International ServerUpdate iSolarCloud serve domain Check Port Parameter for IP addressQuick toturialPart 1 Logger1000 Overview (click here)Part 2 Logger1000 Commissioning Setup (click here) Part 3 Logger1000 iSolarCloud Setup (click here)RS485 ConnectionRecommend that RS485 can be connected by terminal blocks.Please note SG15/20KTL-MT inverters connection is different as SG30/50/110CX inverters.Optional: Ensure the termination resistors (120 Ohm) are enabled ON (SW1) at each end of the RS485 in the inverter line (only the first and the last inverter) when more than 15 inverters are connected.Energy Meter ConnectionThe site electrician will need to calculate the CT ratio required as per the installation. Default Modbus address is 1 and the secondary current of CT should be 5A. Please refer Meter Selection Guide for reference.The corresponding pinouts to RJ45 are Pin 3 (White-green) to RS485- B and Pin 6(Green) to RS485+ A:Terminal 21 to Green cable (RS485+ A) and terminal 22 to White-green cable (RS485- B) on the DTSD1352 energy meter side. The following figures shows themeter cable connection on the eneryg meter side.Connect to Logger1000 via the RS485 cable from the energy meter on RS485 port A2 and B2 if it has not been used.Connection to Logger1000Connect the RS485 comms from the inverter(s) via A1/B1 and the energy meter via A2/B2 to the Logger1000 as an example.On the logger1000 side, A1 and B1 are terminals to connect with the inverter which display as COM1 on the Logger1000 web portal; A2 and B2 are the terminals to connect with the energy meter, they are shown as COM2 on the portal.Logger1000 web portal setupAccess Logger1000 web portalUse a smart device or laptop under Wi-Fi function to search for the SG********** (10 digits number) network that corresponds to the Logger1000 serial number.Open a web browser and enter IP address (11.11.11.1) and password: pw1111 to access below Logger1000 web page.Then you can log in the account (please contact Sungrow for password) via the right top corner login button. When you log in for the first time, a help window will pop up for instruction.Set local timeNavigate to ‘System Time’ under System and select Clock Source to ‘NTP’ and Time Zone to ‘UTC+10:00’ and make sure to SaveAuto search invertersNavigate to‘Device’ and click ‘Device List’ section and click‘Auto search’. Sungrow’s inverters will be automatically detected as long as they are correctly connected and energised.Confirm the communication status for each device under Communication status section. Green icon indicates the connection works and red icon means no connection between Logger1000 and other device.Add Energy MeterThe energy meter needs to be manually added which is same as any other 3rd party equipment.To add the energy meter, click ‘Add device’ and select a device type in the pop-up window and fill in the required information (Add device for DTSD1352 energy meter and device address: 254)If the meter connected with A2 and B2 on the Logger1000, we need to make sure the port number on the portal is COM2. Otherwise, DTSD1352 meter’s status will show disconnect.Add CT Transformation Ratio.Navigate to‘Device Monitoring’ and select DTSD1352. If the ratio is 200/5, then enter value 40.Setup Export Control if requiredSelect Power Control -> Active Power. Then you can set all the parameters as following figures. The Fixed Value of Active Power is the part to set the power limit. Note: make sure to disable ‘Feed-in stop’If it is 50 kW inverter and need export control to 20 kW as an example, then enter‘Fixed Value of Active Power’ to 20 kW.DisableSetup Online MonitoringThe iSolarCloud portal is available for the Logger1000 online monitoring. You need to create an iSolarCloud installer account if you do not have, then you can create a plant to link with Logger1000 via the iSolarCoud APP.Create Plant -> Commercial -> PV -> Com100/Logger100 -> Scan the QR Code of Logger1000Step 1 Step 2Step 3 Step4Then you only need to enter the customer’s basic information, and the plant will be created in a few minutes.After you connect the Logger1000 with the customer’s router via the ethernet cable, you also need to adjust parameter settings on the Logger1000 via WLAN.Use a smart device or laptop under Wi-Fi function to search for the SG********** (10 digits number) network that corresponds to the Logger1000 serial number.Open a web browser again and enter IP address (11.11.11.1) and password: pw1111 to access below Logger1000 web page.Select System-> Remote maintenance, enable the function and make sure the Remote Service Address is selected as International ServerThen go to System-> Transfer Configuration, click the Setting gearwheel highlighted in red to change the Server Domain. Please make sure the domain address is After this, Select Port Parameter-> Ethernet. Select ON for the DHCP setting and the home router could allocate a random IP address to Logger1000.After the above settings completed, go back to the ‘Remote Maintenance’ and check if there is an information indicating the Logger1000 connect with iSolarCloud server.Meanwhile, you can find a cloud icon at the bottom left corner ON, it means the Logger1000 is on iSolarCloud when the icon lights up.。

rs485原理(一)RS485通信协议RS485是一种常用的串行通信协议，用于在远距离通信中传输数据。

它具有高可靠性、抗干扰能力强等特点，被广泛应用于工业控制、自动化、仪器仪表等领域。

本文将从浅入深介绍RS485通信协议的相关原理，帮助读者更好地理解和应用。

1. RS485基础概念RS485是一种差分信号通信协议，即使用两个相反的电信号来表示数据位的“0”和“1”。

它可以同时支持半双工和全双工通信，允许多个节点连接在同一总线上进行通信。

2. RS485物理层连接RS485通信协议的物理层使用一对绞线进行连接，其中一根线为正线(A)、另一根线为负线(B)。

这样设计的目的是为了减小信号的传输噪声和干扰。

3. RS485传输方式RS485协议支持两种不同的传输方式：单点通信和多点通信。

单点通信在单点通信中，RS485总线上只有一个主节点与一个从节点进行通信。

主节点负责发送指令，从节点负责接收并执行指令。

这种方式适用于简单的控制系统，如智能家居等。

多点通信在多点通信中，RS485总线上可以连接多个主节点和从节点，节点之间通过地址进行区分。

主节点可以发送指令给指定的从节点，从节点也可以发送数据给主节点。

这种方式适用于复杂的工业自动化系统，如工控行业等。

4. RS485通信协议RS485通信协议定义了数据帧的格式和通信规则。

数据帧格式RS485通信使用统一的数据帧格式，包括起始位、数据位、校验位和停止位。

典型的数据帧格式为1个起始位、8个数据位、1个校验位和1个停止位。

通信规则RS485通信遵循“主—从”通信模式，主节点负责发起通信，从节点被动接收和响应。

主节点发送数据后，从节点通过校验位判断数据是否正确，并返回响应信息。

5. RS485的优势和应用优势RS485通信协议具有以下优势：•高可靠性：使用差分信号传输，能够有效抵抗干扰和噪声。

•长距离通信：RS485总线可以支持长达1200m的通信距离。

•多点通信：多个节点可以连接在同一总线上进行通信，灵活且经济。