RS232 problem sending with newer PC

[sys_man]

Hello everyone

We have a Fanuc control connected with a 486 class PC for sending g-code over to the control.
Recently I swapped out the 486 class PC with a newer and much faster Pentium class PC. Ever since then I can not transmit from the newer PC to the control, I get an rs232 communications error each time. The PC can receive just fine. I've double checked my setup and all is the same. I've tried other PC's as well with no luck either. Things work great as long as I use any old 486 class or lower PC. It seems as if a Pentium class PC is to fast for the control. I've tried slowing down the com port and that does not help either.

Does anyone have any experiences with this type of issue? If so I would sure appreciate any advice for the next best thing to try.

Regards,

Jeff Norby

[Al_The_Man]

What Fanuc control and what software are you using? also are you using hardware handshake or software HS?
Usually it is not a problem with pentium, although you could get hold of a Null modem cable and try that, that is if you have the Hardware HS jumpered out.
You can also try uploading using Hyperterminal (comes with windows) if the PC is windows based, if you can get a copy of Terminal that came with Win3.1 that works even better, it will also run under Later windows versions.
Al

[cadcam]

What are you using to DNC to the machine?

Also make sure that FIFO is turned off for the port.
What is the OS (oparating system)?

If you can receive there is some thing else going on.

[sys_man]

We have a Fanuc 6M CNC control, 1984. A hardware handshake is being used, always using the same cable that works with the 486 class PC.
We have a 1 to 1 setup..... 1 PC to 1 CNC using a program called EDI to create and send the gcode over to the control.

I've taken into consideration your previous suggestions and hope to test those ideas out.

Thanks again.

Jeff Norby

[Al_The_Man]

Mmm.... I thought the 6M came with a paper tape reader and had to be converted with a BTR (Behind the Tape reader) for RS232?
If you get stuck, try using a three wire cable with Rx, Tx, and Gnd and the 4-5 and 6-8-20 ( 25D pin) jumpered out at each end, none of the jumpered wires connected between ends, and enable software handshake, the 9 pin equivalent is jumper 7-8 & 6-1-4, use 4800 baud max.
Try the other programs first. One of the problems I have seen with using some software on the later PC's is some of the Transfer programs do not initialize/set up the port right away.
Al

[Alex S.A]

The problem can be relationed to operating System. You have a CNC that comunicated with a older PC. This PC has got a older OS and then new PC has got a new OS, for instance: XP from microsoft. These news PC can't support some older versions of software so that causing the comunication problem. What is the description of the error in CNC? I had a such problem, the PC was has got a DOS system and the CNC has got XP system. When we tried to establish comunication then the error happened. Check if the software is suitalble to new PC.

Alex S.A

[william timm]

Sys Man;

Your computer speed is not the problem with the Fanuc serial errors.
Go to control panel, then system properties, hardware, device manager, ports, com1, port settings, advanced set the receive buffer to low (1) and the transmit biffer to 1/4 (6) press OK. The FIFO buffers are the problem.
This is for Windows XP. 89/ME/2K/ NT4 have a similar type of set up.

William Timm

[cadcam]

Greg If for sure right I have seen this issue many times over with Fifo.


I have seen many people use Hyper Terminal and some were and alwas does fails and People will some were move to a more reliable DNC software.

Like what greg Has.

[william timm]

Hi Jeff;
Go to the Refresh Your Memory web site and download the Trial PCEditor. Also download the Manual. In the troubleshooting section the Fanuc and Serial port problems
are listed.
William Timm
This will run for 30 days free rym.com

[Al_The_Man]

You can also get 6M info from the cadem site http://www.cadem.com/ncnet/ncnet_dncdetails-41.htm
Also a freebee DNC program for one machine.
Al

[Drew]

I have a mill with a 6M-b (Burgmaster) my pc to/from cnc via rs-232 works great(3 wire software handshake) with the cadem NCNet 30 day trial software with remote call the lite/free version I tried gave me a DLL error and never ran. Make sure your parameters are set right most use #311 set DC codes 'on' stop bits to 1 or 2 and baud rate. PC is PenII233 OS is Win98se ,RS-232 uses 7-even. Cadem website has very good info on cable and settings. Try the free ver. cant hurt I never tried to get support or help with the lite as I allways wanted the ver with remote program call.

[william timm]

Hi Drew; The DLL error is a PC problem with a dynamic link library file. This is normaly caused by a incomplete or bad program installation.
Bill