Fanuc11M Buffer Overflow

[wsd]

Hello,

We just got three older machines. A mazak, matsuura and a mori seiki. All have Fanuc 11m controllers. The mazak is now connected on the network and is able to send programs into the control with no problems. 9600 baud setting. So for the mori and matsuura I made the same cable for both identical to the one I made for the mazak.

Both the matsuura and mori produce Buffer overflow errors.

Reducing the baud produces framing errors. Also tried fifo off or unchecked.

Any ideas on the Pinout for 25pins(Fanuc controller) to 9 pins_female(PC)? Fanuc 11M rs232 manual? Suggestions?

Thanks, Joe

[Al_The_Man]

Originally Posted by wsd Any ideas on the Pinout for 25pins(Fanuc controller) to 9 pins_female(PC)? Fanuc 11M rs232 manual? Suggestions? Thanks, Joe

Send me a PM with an email add for the manual.
Al.

[angelw]

Originally Posted by wsd Hello, Reducing the baud produces framing errors. Also tried fifo off or unchecked. Any ideas on the Pinout for 25pins(Fanuc controller) to 9 pins_female(PC)? Fanuc 11M rs232 manual? Suggestions? Thanks, Joe

Joe the following pin out works fine for Xon Xoff (Software handshaking). Some diagrams show the PC end jumped as well, but this is unnecessary.

Your transfer software needs to be set for Xon Xoff handshaking and the baud rate has to match what is set on the control. Changing to a slower baud rate at one end only, as the framing error you received would indicate you have done, will not resolve the buffer overflow. 9600 baud is not unreasonable for an 11 series control, so the parameter settings for the two controls not playing the game would be my first point of inspection. With the cable described, make sure that the transfer software handshake setting is set to Xon Xoff handshaking, not hardware or RTS/CTS handshaking, and definitely not set to None.

If you continue to have problems with buffer overflow with the below cable and the correct setting at the control and PC, check to see if your transfer software has an option for a short delay at the end of each block. If so, set a small delay, say10ms and see how that goes. Implementing a delay has a different effect than just using a slower baud rate; you will not see much change in transfer speed even with a 50ms delay. I won't explain why here now, but it does have a marked effect on buffer over run if everything else is set correctly.

Regards,

Bill

Machine End------------PC End
25 Pin-------------------9 Pin
2------------------------2
3------------------------3
7------------------------5
4-|
| bridged
5-|

6 -|
|
8 -| bridged
|
20-|

[stevo1]

Buffer overflow is pretty common on the 10,11 series control. You need to go into the control panel on your PC and select controlpanel>system>devicemanager>ports>select the port you are using>portsettings>advanced. Turn down the FIFO buffers on the transmit.

Stevo