我一直在尝试使用pymodbus通过Modbus TCP从Modbus(这里是Raspberry pi)读取数据。我不断收到无法连接的错误消息。下面是产生此错误的代码段
from pymodbus.client.sync import ModbusTcpClient
#modbus connection
client = ModbusTcpClient('192.168.137.238')
connection = client.connect()
#read register
request = client.read_input_registers(1008,3)
result = request.registers
print(result)
我在pi上本地运行这个。我通过ifconfig获得以下信息,并使用ModbusTcpClient尝试了所有IP地址。我不确定我错过了什么
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.137.238 netmask 255.255.255.0 broadcast 192.168.137.255
inet6 fe80::7ce5:23eb:968f:59de prefixlen 64 scopeid 0x20<link>
ether dc:a6:32:46:d3:1e txqueuelen 1000 (Ethernet)
RX packets 438 bytes 46776 (45.6 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 330 bytes 31566 (30.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 1847 bytes 149291 (145.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1847 bytes 149291 (145.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.1.1.199 netmask 255.255.255.0 broadcast 10.1.1.255
inet6 fe80::7f47:6c9f:f1c:1274 prefixlen 64 scopeid 0x20<link>
inet6 fd9d:fbd1:372:0:7a9c:777b:a806:2350 prefixlen 64 scopeid 0x0<global>
ether dc:a6:32:46:d3:21 txqueuelen 1000 (Ethernet)
RX packets 208 bytes 16783 (16.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 53 bytes 7372 (7.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
我已经看过这个{a1}和{a2}。此外,带有pi的pymodbus通过RTU工作
正如我所看到的,你想从RPi获取数据吗?但在我看来,您的设置是RPi使用自己的IP从“客户端”获取数据。我认为您需要首先设置Modbus从机,以便能够使用Modbus TCP显示数据
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