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Communications problem

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#1 CrazyDanE



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Posted 06 December 2005 - 08:51 AM


A litte hardware storie first.

PLC : 1756-L61 Control logix V15, communicating via 1756-ENBT A ver. 3.9
Ifix : Version 3,5, Driver Igs ( The newest ) dont remember the version.
GE Quick panel: QP Control 12” TFT
RS-linx 2.50

The Ifix and the control logix is sitting in the same switch. The Quick panel is cornectet to the Internet and communicate by a VPN cornection.

The Control logix is communicating whit the Quickpanel and Ifix
The Quick panel is communicating whit Ifix and the Control logix.

After a while the cornection whit the PLC and the Quickpanel stops ( only 8 floating points are transfered between the Quick panel and the control logix ). “The while can be between 1 – 14 days”

The funny part is that it is impossible to go online (by RS-linx ) on the control logix 1756-ENBT A card, but the Ifix can still se the control logix, and read - write data to the plc.

It is also impossible to browse the web server on the 1756-ENBT A.

:-) :oops: :-(

It is like som gates in the ethernet card 1756-ENBT A is getting closed.

By removing the card from the rack, and put it back in, then the communications begin again.

I have tryed to replace the card, using different firmwares ect..

Please :shifty: – I am really lost



Edited by CrazyDanE, 06 December 2005 - 09:01 AM.

#2 Jerry Baldwin

Jerry Baldwin

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Posted 09 December 2005 - 10:11 AM

I'm using a similar set up with an L-62 and a 6" GE quick panel and have not experienced the problem you are describing. Do you have any messaging going on that might be tying up the network? is there anything else on the network?

#3 Wordman



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Posted 09 December 2005 - 11:17 AM

To me it sounds like this problem could be caused by duplicate addresses on the same network?

Just a thought.

#4 CrazyDanE



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Posted 12 December 2005 - 04:21 AM

Thanks for yours reply's. The network is rather big. There are sitting a lot of SLC's 5/05.
See the Word doc.

The system doesn't tell me about any conflicts on the net.

Rockwell in Denmark knows about this problem, and are working on it. They will pu in a "Sniffer" on the network.


Attached Files

  • Attached File  Net.doc   27KB   148 downloads

Edited by CrazyDanE, 12 December 2005 - 04:26 AM.

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