Ab plc-5 dh+ - PLCS.net

eams2010 · October 16th, 2011, 07:50 AM

I've a DH+ network connecting more than 20 AB PLC-5. I use the usb to DH+ converter (1784-U2DHP) to monitor and troubleshoot problems. when the DH+ cable is pluged in to the network the Rslinks does not see any of the PLCs on the network however the network for the m/cs is healthy and all m/cs are running. only when I disconnect the network from the PLC that I'm pluged in to, only then the RSlinks can see that one PLC and communicate withno problems. I've changed the lead, PC and I've tried to plug in to another PLC and the result is the same. Can any one help please? Thanks

curlyandshemp · October 16th, 2011, 07:53 AM

Quote:

Originally Posted by eams2010

I've a DH+ network connecting more than 20 AB PLC-5. I use the usb to DH+ converter (1784-U2DHP) to monitor and troubleshoot problems. when the DH+ cable is pluged in to the network the Rslinks does not see any of the PLCs on the network however the network for the m/cs is healthy and all m/cs are running. only when I disconnect the network from the PLC that I'm pluged in to, only then the RSlinks can see that one PLC and communicate withno problems. I've changed the lead, PC and I've tried to plug in to another PLC and the result is the same. Can any one help please? Thanks

Perhaps the node # of your RSlinx DH+ converter is the same as an existing node on the network.

eams2010 · October 16th, 2011, 07:54 AM

Thnaks for the rapid response. No I usually use zero and the 1st number followed is five.

Mickey · October 16th, 2011, 12:34 PM

What do the status indicators on the USB device tell you? See PDF below.

I would try a very high node address e.g. 63. It can't hurt.

eams2010 · October 19th, 2011, 07:36 AM

Quote:

Originally Posted by Mickey

What do the status indicators on the USB device tell you? See PDF below.

I would try a very high node address e.g. 63. It can't hurt.

Thank you,
I found the problem. There was short in the wiring of the DH+ network. What makes me confused that the netwotk was healthy and all machines were running and communicating with each other with the present of the short in wiring !!!

Mickey · October 19th, 2011, 09:09 AM

Thanks for coming back with your solution. Good to hear all is well now.

The addition of one more node may have tipped the network over the edge.

October 16th, 2011, 07:50 AM	#1
eams2010 Member Join Date: May 2009 Location: Alex Posts: 26	Ab plc-5 dh+ I've a DH+ network connecting more than 20 AB PLC-5. I use the usb to DH+ converter (1784-U2DHP) to monitor and troubleshoot problems. when the DH+ cable is pluged in to the network the Rslinks does not see any of the PLCs on the network however the network for the m/cs is healthy and all m/cs are running. only when I disconnect the network from the PLC that I'm pluged in to, only then the RSlinks can see that one PLC and communicate withno problems. I've changed the lead, PC and I've tried to plug in to another PLC and the result is the same. Can any one help please? Thanks

October 19th, 2011, 09:09 AM	#6
Mickey Lifetime Supporting Member Join Date: May 2003 Location: Palmdale,Ca Posts: 7,519	Thanks for coming back with your solution. Good to hear all is well now. The addition of one more node may have tipped the network over the edge. __________________ Mickey If you want happiness for an hour-take a nap. If you want happiness for a day-go fishing. If you want happiness for a month-getmarried. If you want happiness for a year-inherit a fortune. If you want happiness for a lifetime-help someone else. ----- Chinese Proverb

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October 16th, 2011, 07:54 AM	#3
eams2010 Member Join Date: May 2009 Location: Alex Posts: 26	Thnaks for the rapid response. No I usually use zero and the 1st number followed is five.

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