Modbus连接失败 [英] Modbus connection failed

问题描述

我正在写一个连接到Modbus的代码。但是，当我连接它并尝试读取线圈时，它将显示以下错误： -

Hi, I'm writing a code which connect to Modbus. However, when I connect it and try to read coils it will show the error below:-

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond IPAddress

下面是代码我尝试连接和读取线圈： -

Below is the code that i try to connect and read coils:-

for (startAddress = 0; startAddress < 7; startAddress++)
{
    MBmaster = new Master(IPAddress, 502);
    MBmaster.ReadCoils(ID, startAddress, Length);
}

任何想法如何解决这个问题？

谢谢

Any idea how to solve this problem?
Thanks

推荐答案

将MBmaster = new Master（...）移出for循环，设备可能只接受来自一个主机的一个连接。

Move the MBmaster = new Master(...) out of the for loop, the device can probably only accept one connection from one host.

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