[Network Communication 3] Advantech Gateway Modbus Service Settings

1、前言

Recently China gateway to use researchModbus的通信试验,Before attempting to studyModbusCommunication libraries to communicate with each other.
Attempt to exchange the communication,熟悉Advantech EdgeLink StudioThe use of purpose.

关键字如下所示：

• Advantech EdgeLink Studio
• Modbus Tcp
• Socket 阻塞和非阻塞
• IPv4和IPv6区别
  Use the related software and tools：
• Advanced IP Scanner
• Modbus Poll
• Advantech EdgeLink Studio

2、Advantech EdgeLink Studio使用流程

2.1、总体使用流程

2.2、Important process screenshots

添加设备

The user preferences

modbus服务设置

3、试验流程

3.1、使用Modbus Poll进行连接

3.1.1、Modbus连接设置

3.1.2、ModbusData point to read the Settings

3.1.3、ModbusThe data points, speaking, reading and writing the results

3.2、libmodbusSince the gateway to write program to connect research China process

# Copy the cloning project,运行脚本生成modbus_poll工具
# clear all exec
if [ ! -d "./bin" ]; then
	mkdir bin
else
    cd bin
    rm -rf ./*
    cd ..
fi

if [ ! -d "./build" ]; then
	mkdir build
fi
cd build
# build client
rm -rf *
cmake -DCMAKE_BUILD_TYPE=Release -DClient=ON ..
make
cd release
cp modbus_poll ../../bin
cd ../../
# 使用工具进行modbus通信
if [ -f bin/modbus_poll ]; then
    cd bin/
    # ./modbus_poll --debug -mtcp -t0x01 -r2 -p502 10.0.1.28
    ./modbus_poll --debug -mtcp -t0x03 -r1 -p502 10.0.1.59 -c4
    cd ../
else
    echo "不存在相应的modbus_poll工具"
fi

3.3、Since the programming communication test results

Connecting to 10.0.1.59:502
[00][01][00][00][00][06][01][03][00][01][00][04]
Waiting for a confirmation...
<00><01><00><00><00><0B><01><03><08><00><D6><00><33><00><42><00><00>
SUCCESS: read 4 of elements:
        Data: 0x00d6 0x0033 0x0042 0x0000 

结果说明：

• "./modbus_poll --debug -mtcp -t0x03 -r1 -p502 10.0.1.59 -c4"命令表示从modbus的1地址开始,读取4个寄存器值,At the same time to show.One of the research China gatewayip是10.0.1.59,modbus端口号为502.
• These results and inModbus PollShow in the tool is consistent with the,Communication is success.

4、遇到的问题及解决方法

4.1、问题1

• 现象：自写程序modbus_pollWith the research China gatewayconnect成功,显示"Connect time out"的报错;但是Modbus PollTools can communicate.
• 原因：No China gateway in development"系统设置/网络和Internet/网络设置"中Set up the correspondingIPv4属性
• 解决方法：Set up the correspondingIPv4属性信息,Can be as shown in the following Settings.

4.1.1、Set up the correspondingIPv4属性信息