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
So an enlightening article! I learned plenty from going through it. Your information is extremely well-organized and simple to understand.
Adored this article. It’s very comprehensive and full of helpful information. Fantastic work!
Really liked perusing this post. It’s highly clear and filled with helpful insight. Thank you for providing this.
Great article. I thought the information extremely useful. Loved the method you detailed everything.
Really enjoyed this entry. It provided tons of valuable insights. Great effort on creating this.
Loved the insight in this entry. It’s very detailed and packed with beneficial details. Fantastic effort!
Genuinely enjoyed reading this post. It’s very well-written and full of useful insight. Thank you for offering this.
Loved this entry. It’s extremely detailed and filled with valuable details. Excellent effort!
This post is wonderful! Full of helpful details and highly clear. Many thanks for sharing this.
Really worth it. Perfect.