[hmc710]

Hi All,
Does anyone have a cable schematic to connect a Bp w/Heidenhain TNC145 to a computer and the flow control settings. I've got info from Heidenhain, Tncremont, DNC, i-logic, and generic software and the cables are all different. My control has the 25 pin connector that went to a remote tape drive and floppy. My serial port is set up COM1 2400 baud 7 bit even parity 2 stop bits w/handshake and FIFO is turned off. My last attempt was with a cable wired from PC to CNC: 2-2; 3-3; 4-6 (with pc pin1 jumped to 4); 5-7; 6-20 (with cnc pin 20 jumped to 8); 7-5; 8-4

I checked ac voltages and I am getting signal from machine and pc on correct pins. I did get 2 errors last night on the control but they are hard to read on my screen. I think they said wrong signal and in/out not ready. Any ideas?
Thanks,
HMC710

[arhctysv]

I wire up the cable like this

25 pin connector
Heidenhain ______ Computer
2 ____________ 2
3 ___________ 3
7 ____________ 7
jumper __________ jumper
4-5 ____________4-5
6-8-20 _______ 6-8-20

9 pin connector
2 _____________ 2
3 _____________ 3
jumper _________ jumper
4-5 _________ 7-8
6-8-20 ________ 1-4-6

I made one two weeks ago
and it worked the first time I tried it

Rich
www.archcity.net

[hmc710]

Thanks Rich,
Did you mean 5-7 on the 9-25 pin cable?
What program are you using?
Thanks,
Tim

[hmc710]

Just got BP to transmit to DNCprecision but with errors. Using full handshake cable. Tncremont would not give a response. Closer....

[arhctysv]

Just got BP to transmit to DNCprecision but with errors. Using full handshake cable. Tncremont would not give a response. Closer....

Yes, your right 5-7 on the 9 to 25 pin configuration
I forgot that. That's ground.
Check under the MOD key that you have the right
Baud Rate, Heidenhain likes 2400, and look at
the one setting it should be RS232 not FE.
You can use the Utility program from
Heidenhain's website. It works. I've used it before
Just download it from there. Good luck
Rich
www.archcity.net

[hmc710]

Will check into utility program, thanks.

[hmc710]

Still have not found out where I am going wrong yet. I'll check my machine parameters today. Have the post processor on Bobcad V21, but still can't receive from the mill. I've got a 600+ line program on there and I sure don't want to have to punch it in by hand again....

[gus]

when I ran a 145 I used hyperterminal in windows to upload and download.

2400 baud
no flow control
even parity
one stop bit

check ascii setup, <CR> etc need to be set right



the tnc is fussier than the pc so make sure it goes both ways.

[hmc710]

Thanks for the reply Gus, I appreciate it! I was in my machine parameter this weekend and MP76 is Program End Character and it is set at 3 which my manual says is ETX.

I am also using different parameters than you have listed; full handshake & 2 stop bits. The one picture that is in the manual has a 25 - 25 pin cable configuration with the old style 2-3 & 7-7 cable config, but it also has no handshake which I will give a try.

I'm not exactly sure how to make sure my ascii set up is right. The manuals say CR LF ETX and then shows the coorisponding values, 13, 10, 3. Do I just start my program with 13, 10 (CR, LF)?

Thanks for all your help out there!

[hmc710]

Woo Hoo! Just received data from TNC145 to Bobcad V21. 992 lines of code! Thanks to everyone who helped out with this. Now that I have my program saved its time to start playing. Thanks again for all the help, I really appreciate it.