PV550 Communication Problem

[alphav]

Hello All,
I installed a system with a PV550 and a ML1500 with two 1761-NET-AIC's a couple of years ago. The costumer want to do some changes to the HMI, so I am trying to modifye the HMI in the office using an old PV550 (2711-B5A5 FRN 1.07) and a ML1200. I did it 2 years ago but now I can't.

I am conecting my laptop to one of the NET-AIC's via an 1747-UIC and cable 1761-CBL-PM02. and the micrologix to the other NET-AIC with cable 1761-CBL-HM02. This works fine, I can see the Micrologix 1200 in RSLinx.

To connect to the PV550 I am using cable 1747-CP3 with a NULL-Modem adaptor.

If I connect the PV550 to the NET-AIC where the 1747-UIC(laptop) is connected to I can see the PV550 in RSLinx but not the ML1200, and the same time the PV550 shows the error message "Require network node(s).

If I connect the PV550 to the NET-AIC where the Micrologix 1200 is connected to I can't see either the PV550 or Micrologix 1200 in RSLinx but I do not get the "Node" error message on the PV550.

Instead of using cable 1747-CP3 with a Null-Modem adapter I also tryed to use cable 2706-NC13 (straight trugh cable) as I think I did 2 years ago, but that doesn't work either.

Any Suggestions

Regards
gert

[Mickey]

See pic below
Baud rates must be the same each node must have a different node address. ML1200's port must be configured for DH485.

Power to both AIC's?

http://www.plctalk.net/qanda/uploads/ConnectionDiagram.jpg

[alphav]

Thanks for the reply (again)

I did exactly as in your diagram, using the 2711-NC21 cable. ( I am using an 1747-UIC between my laptop and the 1747-CP3 cable going into the first 1761-NET-AIC) ---- Still not working. Then I made an adapter between the 2711-NC21 cable and the PV550 where I tryed the following a) Disconnected pin 8, and b) crossed pin 7 & 8. Either way I can see the two devices in RSLinx, but I can not download a program to the PV550.
Getting "[Error 2258 - Unable to communicate with operator terminal, did not receive a response.]"

Laptop = Node 0
Micrologix 1200 is set to Node 1, Baud 19200
PV550 is set to Node 2, Baud 19200

Regards, gert

[Mickey]

See link below for some Knowledgebase stuff on the subject.
Make sure to click on the related answers.

http://rockwellautomation.custhelp.com/cgi-bin/rockwellautomation.cfg/php/enduser/popup_adp.php?p_sid=OqyXUCkj&p_lva=&p_li=&p_faqid=54621&p_created=1219418277&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX 3Jvd19jbnQ9MTIwLDEyMCZwX3Byb2RzPTAmcF9jYXRzPTAmcF9 wdj0mcF9jdj0mcF9zZWFyY2hfdHlwZT1hbnN3ZXJzLnNlYXJja F9ubCZwX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PUVycm9yIDIyNTg *

[alphav]

Thanks Mickey
When I opened up the link you sent, I imidiatly recognized the frace DO NOT USE AUTO CONFIGURE! The "1770-KF3/1747-KE" configuration, was what I used 2 years ago.

Connecting the 1747-UIC and the PV550 with the 2711-NC21 cable to one NET-AIC works fine. I can see the PV550 in RSLinx and I can download as well.
However, if I connect the second NET-AIC and connect the ML1200 to that unit, the network stops working. To solve that problem I made an adapter going into the PV550 with pin 7 & 8 crossed, then everything works.

Thanks again....
gert

[Mickey]

Well glad to hear you got it working.
But I'm confused as to what/why you did with pins 7 & 8. Maybe a drawing of this would help.

See below a drawing of the 2711-NC21 cable

[alphav]

Look at the link below

http://rockwellautomation.custhelp.com/cgi-bin/rockwellautomation.cfg/php/enduser/std_adp.php?p_faqid=19754&p_created=989527902

I found this link on this forum while I was looking for solutions

gert

[Mickey]

Look at the link below

http://rockwellautomation.custhelp.com/cgi-bin/rockwellautomation.cfg/php/enduser/std_adp.php?p_faqid=19754&p_created=989527902

I found this link on this forum while I was looking for solutions

gert


OH
Thanks