Need Help!- Fanuc 3M and RS232 communication

[teamjnz]

Hello Friends

I have a 1984 Kitamura, MyCenter1 and the only thing now to get it running is the ability to communicate with a PC. I have read and looked at many threads regarding RS232 cables. I need to make a cable now. I haven't seen any threads for the 3M controller and RS232 communication. It does have a RS232 port on the side and I know it works. I bought it from a shop that still used the machine.

Do I need a null modem cable or a full handshakes?

I know I have seen a 25 pin to 25 pin cable diagram too. But I can't seem to find it again. So I am asking for help..

[WGoyer]

The 3M uses the standard Fanuc config:

CNC Side.................................Computer side
2................................................3
3................................................2
4.........
5.........|


6.........
8.........|
20.......|

7.................................................7

4 and 5 shorted together. 6,8,20 shorted together



Warren
www.uptimecorp.com

[teamjnz]

Originally Posted by WGoyer The 3M uses the standard Fanuc config: CNC Side.................................Computer side 2................................................3 3................................................2 4......... 5.........| 6......... 8.........| 20.......| 7.................................................7 4 and 5 shorted together. 6,8,20 shorted together Warren www.uptimecorp.com

Thanks Man...

Shorted together?? Does this mean I hook the 4 and 5 pin on the same wire, jumper them? The same on both sides, CNC and PC? The same with 6,8,and 20 for both sides?

What about grounding? I read that grounding is important and if it isn't done properly fuses can blow.

Thanks

[WGoyer]

Solder a jumper between 4 and 5 only on the Fanuc side. Also do the same with 6,8, and 20 onlly on the Fanuc side. Pin 7 grounds the chassis of the computer with the chassis of the Fanuc.

Very bad things happen if your machine is not grounded properly to the same ground that the computer is grounded to. If in doubt, take an AC voltmeter and measure pin 7 on the Fanuc to pin 7 on the computer BEFORE plugging in your cable. Anything over a few volts AC could signal trouble.

Tens of thousands of connections are made to Fanuc controls without any problems every day. Chances of trouble here are slim.

Warren

www.uptimecorp.com

[Al_The_Man]

If you want the now common 9 pin RS232 on the PC side.
The 3 wire cable is
25pin ***********9 pin
4-5 jumpered and 7-8 on the 9 pin end
6-8-20 jumpered and 1-4-6 on 9 pin end
2-----------------2
3-----------------3
7-----------------5
No connection between 9pin & 25 pin jumpered out pins.
Some PC communication programs will turn off the Hardware Handshake in which case the jumpers on the 9 end could be eliminated.
Al.

[chuy]

I know most guys in here make their own communication , but save your self the trouble... go to radio shack and buy a null modem is already set. Just plug it in and go. that's what I did. never had a problem. seems to me to much of a pain in the butt...

[Al_The_Man]

The only problem I have come across there is you do not get a 3 wire cable with the Hardware HS jumpered out.
When you power some PC's up and it seems prevalent in laptops, the UART chip does not always get initialized right away and the HS lines can be low instead of high untill you exercise the port.
If you happen to transmit from the controller in this condition, you get an error.
The 3 wire eliminates all these possibilities.
Most controls use XON XOFF, so the H.H.S. is not needed.
Al.

[teamjnz]

Originally Posted by chuy I know most guys in here make their own communication , but save your self the trouble... go to radio shack and buy a null modem is already set. Just plug it in and go. that's what I did. never had a problem. seems to me to much of a pain in the butt...

I went to Radio Shack but they didn't have a 25 pin null modem, only a 9 pin. I would much rather do it the easy way, but i am going to try and build a cable. My computer only has a BD25 connector

Thanks for the help thou.

[teamjnz]

Originally Posted by WGoyer Solder a jumper between 4 and 5 only on the Fanuc side. Also do the same with 6,8, and 20 onlly on the Fanuc side. Pin 7 grounds the chassis of the computer with the chassis of the Fanuc. Very bad things happen if your machine is not grounded properly to the same ground that the computer is grounded to. If in doubt, take an AC voltmeter and measure pin 7 on the Fanuc to pin 7 on the computer BEFORE plugging in your cable. Anything over a few volts AC could signal trouble. Tens of thousands of connections are made to Fanuc controls without any problems every day. Chances of trouble here are slim. Warren www.uptimecorp.com

Thanks to all for the input. Special thanks to Warren. I built my cable and will be connecting it tomorrow to see if it works.

[teamjnz]

I would like some suggestions for trouble shooting this. The machine just waits for the input code with the blinking LSK.

I know the machine is set at 4800 baud rate and so is the software. Oh I am using Cimco V5.

How do I find out what the stop bits, parity and flow control are set in the machine. I played around with these setting but I couldn't get the code in the machine.

Any suggestions?
Thanks

[Al_The_Man]

P0014.0 0= 1 stop bit 1= 2 stop bits
0068 baud rate for port 0
0069 baud rate for port 1
Al.

[teamjnz]

Originally Posted by Al_The_Man P0014.0 0= 1 stop bit 1= 2 stop bits 0068 baud rate for port 0 0069 baud rate for port 1 Al.

Thanks Al, I will look at it tonight.

This is for the 3M Fanuc?