Two serial ports - what is difference?

[xiondavis]

I have a Haas Mini Mill built in Feb 2006. There are two serial ports on my machine. The top serial port is plugged into the I/O board (middle board). The bottom port is plugged into the memory board.

I'm currently using the top serial port to backup and restore my programs. I have 8mb of active programs, each about 700kb in size - it takes about 20 minutes to back them up via serial port, but it took 14 hours to restore after deleting all programs.

Does anyone know what the difference is between the two ports?

Does anyone know why reloading my programs (8mb) took 14 hours when the backup only took 20 minutes? Same settings. What about DNC? I have a lot of small steps - i havn't tried DNC, but is the serial port fast enough?

thanks!

[pit202]

Serials are up to 115200 bps , but you need a short and/or good cables.

The upper serial is for transferring programs like you do , and the bottom one is for external indexing fourth and more axis.

[xiondavis]

Thanks.

Now i just have to figure out why it took 14 hours at 115kbps to reload my data - it would have been faster to use floppys...

-J

[HuFlungDung]

Sound pretty strange to me.
Are the reloaded programs correct, or have you checked the data for errors yet?
I would carefully check the comm parameters. It is possible to download fast to a PC because the PC may receive without error checking. So perhaps when uploading to the control, some error checking function is detecting a lot of noise or something, and thus slowing the transmission.

[gar]

081003-1910 EST USA

xiondavis:

In both directions you can transfer about 600,000 bytes per minute at 115.2 kbaud.

If you use XMODEM for transfer there is error detection and correction. If you use parity check, then any error will cause the prograqm to halt transfer and you have to start over. If you do not use parity or XMODEM, then there is no error checking except for some program syntax checking, something that HAAS can not understand.

Your PC program and delays in it are your probable problem. Without any handshake there are times when I can send a large file to HAAS without error at 115.2 kbaud. HAAS should not be the normal cause of slow transfer.

.

[Moxo]

The upper rs232 port is for DNC comunication, the other one is used with serial rotarys controler boxes.

About 8Mb programas, you can use DNC (115200 or 38400 needed for point to point program type