Fanuc O-T baud rate

[ttorqueshop]

I have a Daewoo Puma 6S with Fanuc O-T control. I'm trying to hook up communications and need to know how to find out what my baud rate is and how to change it if possible. I think it's in the parameters somewhere but I've never messed with any of that stuff before and don't know where to find it. Any help would be great!

[Jarwalcot]

System 0 series

parameters 553 and 554

[Jarwalcot]

These are notes I put together from some help that was sent my way... Perhaps they will help you.

Good Luck,

The Fanuc 3T uses parameters 005 and 068 for the "device 0" serial port. Here's what to set. Use MDI mode to change parameters, and you'll have to turn on the "Parameter Enable" toggle switch on the main PCB to change them. You'll get an alarm when the switch is on. That's normal. When entering parameters, page up to the parameter you want to change, press the "P" key, then the data, then INPUT. You're operator's manual should have the procedure for entering parameters.

On the first parameter page, you'll see a bit marked "TVON". That should be set to "0"

On the same page, you'll see a bit marked "I/O". That should also be set to "0"

On the same page, you'll see a bit marked PUNCH CODE, or possibly "ISO". Set that bit to "1" so the Fanuc will send ISO tape code.

Page up to parameter 005 and set:
The bit on the FAR LEFT should be "1", the bit on the FAR RIGHT should be a "1", and the THIRD bit from the RIGHT must be a "0". The other 5 bits are not used for the serial port, so don't change them. They're probably all zeros anyway.

Parameter 068 sets your baudrate. Set that parameter to "4800" for 4800 baud, which I recommended.

Set your DNC software to send 4800 baud, 2 stop-bits, 7 data bits, EVEN parity. Also be sure that your DNC software sends a Line-Feed or "LF" character at the end of each block.

Your programs on the PC should read like this:

%
:1234
N1
N2
N3
etc.
M30
%


Your cable should be made like this:

CNC side 25-pin male --- PC side 9-pin female
pin 2 ------------------- pin 2
pin 3 ------------------- pin 3
pin 5 ------------------- pin 7
pin 7 ------------------- pin 5
pin 6 ---
pin 8 --- <-- jumper these 3 together on CNC side only
pin 20 --


_______________________________________

The Fanuc 3T has a serial port, but it does not have a "TAPE" mode capability in the internal software. You can use EDIT mode to upload and download files from a PC, but you can't run in "drip-feed" mode like you can on other Fanuc models.

Any tape reader that's used on a Fanuc 3T is a SERIAL tape reader, not a PARALLEL tape reader like on the Fanuc systems 5 and 6.

There is a blue plastic Honda plug on the Fanuc 3Ts main board that has the RS232 signals. I believe that that connector is labeled "M5" (but I may be wrong about that). Usually, there is a cable from that Honda connector to a standard DB25 connector on the outside of the control, under a little "flapper door". If you have a built-in tape reader, you may have a cable from that Honda plug to the tape reader instead.

If you have a DB25 connector on the outside of the control (most 3Ts do), make a cable like this:

25-pin male --------- 9-pin female PC side
pin 1 --------- shield
pin 2 ----------------- pin 2
pin 3 ----------------- pin 3
pin 5 ----------------- pin 7
pin 7 ----------------- pin 5
pin 6 ---
pin 8 --- <-- jumper these 3 pins together
pin 20 --

The Fanuc's parameters are usually set

Parameter 005: 1 x x x x 0 x 1 --- "x" = doesn't matter.
Parameter 068: 4800

Setting bits:
TVON = 0
I/O = 0
ISO = 1

To send a file from the Fanuc to the PC, get the PC ready to receive, select EDIT mode on the Fanuc, turn off the memory protect key switch, key in the O-number you want to send, then press the green START key

To send a file to the CNC memory, make all the same settings on the CNC, get the file ready to send on the PC, then press the INPUT button.

Your PC software should send data at 4800 baud, 2 stop-bits, 7 data bits, Even parity, and Xon/Xoff handshaking.


Setting the CNC

Most CNC units use several "parameter" registers to configure the CNC's RS-232 port. Changing the parameters is usually done by entering new data at the CNC keyboard in the manual data input mode. For more information about how to change the parameter settings, refer to your CNC's user manual. It is very important that the baudrate setting of the CNC unit matches the baudrate used in line 40 of the FROMDISK and TODISK programs.



The four most common types of Fanuc CNCs are:

1) System 3 series (3T, 3M, 3TF, etc.)

2) System 6 series (6T, 6M)

3) System 6-B series (6TB, 6TF, 6MB, 6MF, etc.)

4) System 10/11/12/15 series (all variations)

5) System 0 (0TA, 0TB, 0TC, 0MA, 0MB, and 0MC)

Each series has a different set of parameters for the RS-232 port.



System 3 series:

a) Set baudrate with parameter #68 and #69 (set both to 300)

b) Set parameters 5 and 14 to: 1xxxx0x0 (bits marked "x" are

used for something else - do not change).

c) Other SETTING values: Punch Code = ISO, I/O device = 0



System 6A series (6T,6M - older models):

a) Set baudrate with parameter #25 (10001100 = 300 baud)

b) Set parameter #24 to: xxxxxxx0 (don't change bits with "x")

c) Set parameter #26 to: 0xxxxxxx " " " "

d) Other SETTING values: Punch code = ISO, INPUT DEVICE 2 = 1



System 6B series (6TB, 6MB, and so on):

a) Set baudrate with parameter #311 (11000101 = 300 baud)

b) Set parameters 340 and 341 to: 2

c) Other SETTING values: Punch code = ISO, INPUT DEVICE 2 = 1



System 10/11/12/15 series:

a) Set parameters 5110, 5120 and 5130 to : 3 (I/O type)

b) Set parameters 5111, 5121 and 5131 to : 1 (stop-bits)

c) Set parameters 5112, 5122 and 5132 to : 6 (300 baud)

d) Set parameter 0000 to: xxx01010 (disregard bits marked "x")

e) Other SETTING values: PUNCH CODE = ISO, INPUT DEVICE =1,

OUTPUT DEVICE = 1



System 0 series

a) Set parameters 0002 and 0012 to: 1xxxx0x0

b) Set parameters 553 and 554 to: 6 (300 baud)

c) Other SETTING values: PUNCH CODE = ISO, I/O = 1





Making the cable

Most CNC units, tape punch/readers and computers use the standard DTE (Data Terminal Equipment) pin assignments on the RS-232 plug. When connecting two DTE devices together (such as hooking the personal computer to a Fanuc control unit) you must "cross-connect" some wires as shown in Figure 1. When connecting the personal computer to a DSI tape punch/reader, use the MODEM plug on the back of the tape punch/reader. Use only high quality shielded cable with 22 or 24 gage stranded wires.

Some personal computers will have a 9-pin male plug intead of a standard 25-pin plug for the RS-232 serial port. If your computer has a 9-pin plug, use use a 9 to 25 pin adapter, sometimes called an "AT serial port adapter". These adapters are readily available for about $5 at Radio Shack, and are used with the cable described below.





male for Fanuc CNC side --------------------------------- female for PC side



2 *--------------------------* 3

3 *--------------------------* 2

4 *--------------------------* 5

5 *--------------------------* 4

7 *--------------------------* 7

6*------ Tie pins 6, 8, and 20 together on CNC side

8*------

20*----

[ttorqueshop]

Can I get 4800 baud rate out of the O-T?

[ttorqueshop]

Ok I think I got it. Thanks a TON for all your help!

[Kevin Taylor]

JR I'm going to need to RS232 to a 3T and Have a DB9 on the PC end is there a pin out for that and what other pra. would I need to set up in the PC I have used hypertherm on my BPT's and it work's well to treansfer from cad or hand code Thank's Kevin

[gm3211]

Kevin,

The pin was listed in JR's post:

25-pin male --------- 9-pin female PC side
pin 1 --------- shield
pin 2 ----------------- pin 2
pin 3 ----------------- pin 3
pin 5 ----------------- pin 7
pin 7 ----------------- pin 5
pin 6 ---
pin 8 --- <-- jumper these 3 pins together
pin 20 --

Or, just visit our site and we can ship you a cable pre-made.