"PIN CONNECTION"

[terryrea]

I AM HAVING A PROBLEM COMMUNICATING BETWEEN MY

LAPTOP _ (CIMCO EDITOR) AND A FANUC 16 CONTROL.

I SUSPECT THE CABLE (I AM NOT SURE OF THE CORRECT PIN CONNECTION FOR THE RS232 "END . ANY AND ALL HELP WOULD BE GREATLY APPRECIATED .

[Mark H]

Not sure about the FANUC, but my MAZAK uses a NULL MODEM cable for RS232. It is NOT a striaght through conncetion. I believe pins 2 and 3 are crossed.

[Mark H]

I just remembered that I saw this question posted on the regular Mastercam forum (not the instructor forum) but anyway, here is the link to it... Topic: RS232 for fanuc

[ 01-24-2002: Message edited by: Mark H ]

[Phil Orenstein]

That is correct, pins 2 and 3 should be crossed. One is for transmitting and one for recieving. You can check that out by opening the screws on the cable pin housing. If they are not crossed and you are handy with a soldering iron, you can reverse them yourself.

Good Luck

[Reece L Gibson]

You know I have a .MC8 file on different pin config's.

I will put it on the ftp site if it is O.K

[Chips Ahoy]

If you didn't take your cable apart you could do a continuity check to see if the wires are crossed.Rick

[Charles Davis]

Please see the next message, I accidently hit send before completing this one.

[ 01-28-2002: Message edited by: Charles Davis from San Diego CADCAM ]

[Charles Davis]

Since you are going from a 9-pin connector to a 25 pin connector, I don't think you cross the 2-3 wires.

Here is the correct configuration for a 9-25 pin:

 

9-pin side...25-pin side

2-----------------2

3-----------------3

5-----------------7

9-pin (computer) side jumpers

jumper 7&8

jumper 1&4&5

25-pin (machine) side jumpers

jumper 4&5

jumper 6&8&20

By jumper, I mean just tie those pins together at the plug.

Most machines use the following configuration:

Data Bits: 7

Parity: Even

Stop Bits: 1 or 2

Try to keep the cable less than 75-100 feet: the shorter the better.

If you get garbage on the line, you're most of the way there. Just play with the baud rate and stop bits.

Go 4800-9600 for longer cables. If the cable is less than 15 feet or so, you can get 39K or better.

Definitely use a shielded cable, and shut the shield to ground (pin 1).

If you have a wierd machine where 2&3 are crossed, try just swapping the 2&3 wires (that is, if you get nothing transmitting), but leave everything else the same.

When troubleshooting, change only one thing (wire, comm parameter, etc) at a time. That way, if it doesn't work, you can switch that thing back. And when it does work, you'll know what the problem was!

Sorry for the long reply, but feel this needed it.

[ 01-28-2002: Message edited by: Charles Davis from San Diego CADCAM ]

[Chips Ahoy]

Millturn, What is that file called? Rick

[Paul Nelson]

Try this link:

http://www.gefanuc.com/support/cnc/2020.htm

 

or try this link:

http://www.gefanuc.com/support/cnc/3005.htm

 

or see the whole list at this link:

http://www.gefanuc.com/support/cnc/faxlist.htm

[Chips Ahoy]

Thanks Paul. Those links were perfect.