connection intermittent cRIO (with MAX, etc.)

Our cRIO connects to our fine PC when it is initialized at first - and you can view it fine in MAX, Manager of distributed system and its web interface. But after all 3-5 minutes it always loses connection. It remains disconnected, and only restart the cRIO restores the connection but only for another 3-5 minutes. Only MAX restart does not help. We can ping the cRIO ok when 'disconnected' - which, to me, implies that it is a problem of higher level software.

We had this particular cRIO work fine before.

Thanks for your suggestions... While not in a rush to do this, I really want to understand why the connection is intermittent

Here are some details:

  • MAX version 5.0.0f1
  • LV2011 DS2
  • cRIO is a 9022 (no screws running on it to the commissioning, CPU minimum load - idle = 97%)
  • computer development is a Vista Home Premium 32 bit
  • connected together using the brand-new Cat5E cable
  • TCP/IP settings on the laptop - Static IP, IP 192.168.2.4 address, mask 255.255.255.0
  • TCP/IP settings on cRIO - Static IP, the IP 192.168.2.1, mask 255.255.255.0 (gateway and DNS are blank or 0.0.0.0)
  • cRIO set to use for the link speed autonegotiation (no option to change this) and detection of packets = "interrupt".
  • PC value link autonegotiation speed, but has no effect on the problem, if it is set on a fixed, low speed for example. Half-Duplex 10 Mbps
  • PC Firewall is configured to allow the port 3580, and actually disable the firewall altogether change the problem

Had the chance to try again with my intermittent connection to cRIO, and here's what I found:

  • Connection through a switch, rather than directly with crossover cable - made no difference, still kept disconnecting after 3-4 minutes
  • With no other network on my laptop other than the LAN - no difference development
  • cRIO with APP No. dip switch select IT - no difference
  • cRIO with game of dip-switch SAFE MODE - this time it is remained connected, but this mode is not very useful as a solution

Then I was reinstalling the software cRIO as suggested - it did not complete the first time, but second attempt was beautiful and connection is now very stable (and has not abandoned in the last 30 minutes).

Here are the instructions to reinstall (just in case useful for others):

  1. In the measurement and Automation Explorer (MAX), access remote systems | cRIO | Software
  2. Click on the "Add/Remove software", and an installation wizard will appear
  3. With currently installed version of the selected software - "then click to reinstall the software currently installed.
  4. Follow the rest of the instructions, and it should take about 4-5 minutes

Thanks for your help

Andy

Tags: NI Hardware

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