PV550 Communication Problem

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

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?

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

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

http://rockwellautomation.custhelp....wX3BhZ2U9MSZwX3NlYXJjaF90ZXh0PUVycm9yIDIyNTg*

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

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

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
http://rockwellautomation.custhelp....std_adp.php?p_faqid=19754&p_created=989527902

alphav said:

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

Click to expand...

OH
Thanks