200Smart与仪表的modbus通讯
仪表的功能码：0x03:读保持寄存器
0x04:读输入寄存器
仪表的输入寄存器地址 0x0001 温度值 2字节
0x0002 湿度值 2字节
Modscan32软件充当主站，用485线将仪表和电脑连接。
在MODSCSAN32软件中，配置—》显示选项—》显示数据流
注意：Modscan32软件与仪表通讯时，PLC就无法与仪表通信了，因为Modbus是
单主站通讯。Modscan32充当主站，PLC就无法当主站了。
由PLC作为主站跟仪表进行通讯：
当有多个Modbus仪表时，要修改仪表的设备号
当连接有多个Modbus仪表时，需要通过Modscan32软件修改每个仪表的设备号
然后再连入PLC进行通讯。
此时已把默认的站地址1改成了站地址2了。
MODBUS（客户端和服务端）指令的管脚定义
Modbus地址与S7-200Smart CPU地址映射关系
Really liked reading this post. It’s highly articulate and packed with valuable details. Many thanks for sharing this.
Wonderful entry. It’s highly clear and filled with useful insight. Thanks for offering this information.
This article is highly educational. I genuinely valued perusing it. The information is extremely well-organized and simple to understand.
This article is wonderful. I learned tons from reading it. The information is extremely educational and arranged.
Really liked reading this article. It’s highly articulate and filled with valuable details. Thanks for sharing this.
This post is wonderful. I gained a lot from going through it. The details is highly educational and structured.
Adored this article. It’s highly comprehensive and full of useful details. Fantastic work!
Great entry. I thought the information extremely useful. Loved the method you explained all the points.
This is extremely enlightening. I genuinely valued reading it. The content is very structured and simple to understand.
Appreciated the insight in this entry. It’s highly well-researched and packed with useful details. Fantastic work!