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HMI won't connect to PC for programming


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#1 Lamboom

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Posted 28 October 2017 - 10:53 AM

Hi  .. I'm trying to program a Red Lion HMI..  No problem using several PC's (Dell E630 and E6410)  But one Dell E6410 fails to connect via Ethernet LAN port.   All of the 4 PC's (2) E630 and (2) E6410 are configured the same .. Fixed Ethernet IP address (192.168.0.105)  .. all the same.  By connecting each one 1 at a time to the HMI (192.168.0.20) .. three computers connect no problem .. one (a E6410) does not.

 

So this is a computer configuration problem?.. or a Ethernet LAN card problem?.. or a FIREWALL problem? 

 

I'm not real sharp with PC's .. but, I do know enough to work with them... most of the time ... I don't know how to troubleshoot this problem .. or how to troubleshoot a network connection problem.

 

Any ideas would be appreciated... also, is there a simple tutorial out  there which details all the steps in configuring a LAN port.. and making sure a firewall doesn't block it?



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#2 Lamboom

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Posted 30 October 2017 - 10:40 AM

PROBLEM SOLVED... The reason was not expected .. and worth sharing.    There were many good articles out there on how to manage the Windows Firewall .. but that wasn't the problem.

There were two identical computers, each was to be able to communicate with the HMI (not at the same time)  One could do it, the other could not.

 

The HMI's IP address is set by configuration software created by the PC, and downloaded to the HMI.   That IP address was 192.168.0.20

Neither of these two PC's had made the original download.   I looked at the LAN static IP address for both PC's, and it was 192.168.0.105

Then I checked (using NetSetMan) the IP address of the PC's WiFi ... One was 192.168.0.19 (the PC that worked) ... and the other was 192.168.0.20 (the one that didn't work)

 

Could there be a conflict?  Two different networks: one trying to communicate with to an IP address over LAN, which is the same as the PC's WiFi  DHCP IP Address?    REALLY?

 

So I turned off the WiFi (little switch on the side of the PC),  Powered Cycled the PC ...  And The communication worked.

 

Well, I liked having the WiFi active .. almost never turn it off   So, I re-sent the HMI configuration software with a new IP address for the HMI: 192.168.0.25    "Bleeping Computer" indeed.

 

PS.. I do have to turn the WiFi off when running a full Virus Scan with System Mechanic .. otherwise SM will crash .. but that's another story.


Edited by Lamboom, 30 October 2017 - 10:41 AM.





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