default port comms
I'm under the latest version of Lookout in a very simple configuration to control three Modbus nodes on a USB / 485 port converter. Everything works perfectly and has been installed on both machines. There was a problem with the first machine in the built-in control port 485 pc had a problem that brought me to swap to the USB interface. This fixed the problem so I used it on the second computer. What is happening now is the second machine will work properly during a random delay then lose any communication via the port. The customer takes note that the indicators of activity on the nodes are dead and Modbus stats show the response failures. Re start the Setup complete cures the problem for a while, which seems to be between 2 to 60 minutes. Strangely enough the first machine is now done the same stuff after having worked without problem for several days. Modbus nodes are one of the 8 outputs, one of 16 inputs and 2 analog inputs. Needless to say it worked perfectly when I was on the site for a few days and work is a half-day plane ride away.
Apart from the change of the address of the port, everything is according to the default values of the lookout.
We record the communication on serial port data and see what happens.
Select the Option-> Serial Ports, choose the COM port uses Modbus. Activate the 'Diagnostic File Settings', name of input file and check the 'value in hexadecimal. Then the Modbus communication on this COM port is stored in the file. Run the process until the problem occurs. Attach the file of newspaper here.
Tags: NI Software
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