HerpaMoTeH
Posts: 26
Joined: Tue Apr 17, 2012 7:14 am

C# Modbus RTU problem

Mon Nov 05, 2012 9:42 am

Hi guys,
I have the following problem. When I try to connect to a USB to serial Converter the Rpi freezes. The library I'm using is nmodbus. Has someone been able to connect with a Modbus rtu device and if yes using what library?

HerpaMoTeH
Posts: 26
Joined: Tue Apr 17, 2012 7:14 am

Re: C# Modbus RTU problem

Mon Nov 05, 2012 11:57 am

After some tests I found out that the Rpi freezes when you try to connect to the USB converter.

rickthenick
Posts: 3
Joined: Sun Nov 04, 2012 7:50 pm

Re: C# Modbus RTU problem

Fri Nov 09, 2012 1:22 am

Yes, I am using libmodbus-3.0.3 with raspbian and FTDI USB-RS485 Cable.

It works fine, but there is something wrong with the USB driver that hangs thi pi. You can read more about this on http://www.raspberrypi.org/phpBB3/viewt ... 0&p=210013

HerpaMoTeH
Posts: 26
Joined: Tue Apr 17, 2012 7:14 am

Re: C# Modbus RTU problem

Fri Nov 09, 2012 6:58 am

Edit: The problem doesn't seem to be the power consumption of the converter, since it only draws 20 to 25 mA from the USB.

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