Connecting to a 1770-KFC through a modem...........

[danger_boy]

#)$#@)($WJEHQ@WEY@(*#E$)!#@$()@!

Now that I got my frustrations out.

I am trying to connect onto a Controlnet network remotely through a 1770-KFC1.5 module and a modem.

The modem on the site is a Data-Linc.

I cannot for the life of me see the network. I can do it locally connecting directly onto the KFC with my laptop, but when I connect through my modem, all I see in RSLinx is my workstation and two other nodes (01 and 63 - Both displaying RSLinx Server). I have no clue what these other 2 nodes are. Locally, I can see each of my 12 PLCs and their proper names.....Just like when I hook up with my Controlnet PCMCIA card.

Anyone have any experience with this????? I have come to my wits end and I am about to throw something at the KFC!!!!!

Thanks for any help......

Danny

 

[Eddie Willers]

Please, don't throw anything, I'm quite old and slow and will not be able to get out of the way. Just like the 1770-KFC15.

Is this a dialup modem, or a radio modem ? If it is a dialup modem, what kind of modem are you using at your PC side ?

The first thing that comes to mind is the cable between the modem and the 1770-KFC15. If that same cable works with your PC, then it might not be right for the modem; remember, cables to the PC are typically "null-modem" cables, whereas the modem itself is what swaps Transmit and Receive when it's in the circuit.

I'm not a fan of the 1770-KFC15. It has such lousy bandwidth that I never try to use it with RSNetworx, just with RSLogix 5.

 

[danger_boy]

Dial-up modem. The modem on my end is the standard modem that comes with my Toshiba laptop.

I was thinking the cable too.....but I have tried both null modem and the 2-3/3-2 type. Neither is working.

The modem connected to the KFC is a Data-Linc. Do you know if they are very sensitive to line quality?

Thanks for the advice on RSNetworx, I will keep it in mind.

Thanks for the help.

 

[panic mode]

Actually this IS the null modem cable (pins 2 and 3 are crossed to
allow DTE<>DTE communication without phisical modem - jst a cable):
2-3
3-2
5-5
1747-CP3 and 1756-CP3 are null modem cables ("null modem"
means "no modem").
Modem cable (!) is straight (DTE<>DCE):

2-2
3-3
5-5
(etc.)