Re: Serial communicaions

Samurai makes an excellent point. Nothing posted previously says the
existing hardware is functioning properly. Posted previously were
solutions that assumed hardware on both ends was working properly -
which was only assumed. Changing cables would not provide useful
information. Smarter techs use an oscillscope or equivalent test
equipment. A badly distorted communication signal from defective
hardware would work most times - fail intermittently - and only be
clearly defective on test equipment. Is the Fanuc or data terminal
equipment marginal?

Samuai also implies is that the Fanuc already uses an Xon/Xoff
protocol or something that makes hardware data throttling (pins 4-5)
unnecessary. If you connect 4 to 5 and it works does not mean
throttling is unnecessary. Only means that one location does not
require data throttling. Connecting 4-5 together must be stated by the
manual - else it might be required in some locations and not others.

20 meters is excessive even if is works in some locations. Why?
Because 20 meters must work in every location. It does not. But
again, little things such as where the AC plugs are connected can
affect RS-232 - which is why RS-232 is not for distance communication.

Again, samurai makes a valid point. Were machines at each end of the
cable partially damaged? How would you know? What do comprehensive
hardware diagnostics (or other confirming methods) report? Without
confirming facts, we may only be working 'around the problem' as
samurai has warned.

samurai wrote:
Fanuc don't need 5 wire, just 2-3 crossed, and 6,8,20 connected
together, while 4-5 are connected together.

20m is not long at all, even at 9600 baud.

I would prove that that your communications is working before trying
RS422 or Nport converters.

Have you tried a different cable, or sending CNC to CNC?? Or setup a
computer right beside the machine?
Have you double checked all the parameter settings, identical to the
other machines?

By rebooting the computer, it still sounds like a problem with the
computer.

Eliminate the problem, don't work around the problem.

.

Relevant Pages

  • RE: remote desktop
    ... users use XP Remote Desktop to connect other machines, ... hardware or driver is changed on the computer which connecting to. ...
    (microsoft.public.office.misc)
  • Re: usb splitter -- is there such thing?
    ... Consider installing the printer on one computer, connecting the computers together with a LAN, setting up a work group and activating printer sharing. ... As far as hardware is concerned, connecting two relatively new machines may only require a crossover cable. ... Connecting three or more machines may require a regular category 5 network cable for each computer and a single router. ...
    (microsoft.public.windowsxp.hardware)
  • Re: OT: my new PC rocks!!
    ... "hardware mix and match" for home users, where they could slot in any ... that with the PC's delibrately "loose" architecture then machines ... slowness of Windows software to cater for something that no-one seems ... The only advatange of Microsoft stuff; The installs tend to be less ...
    (alt.lang.asm)
  • Re: Need tutorials, guides... However...
    ... performance loss you'll get from an OS like Windows or Linux. ... machines out there have gone off in many different directions. ... expect to find certain hardware at certain addressess. ...
    (alt.lang.asm)
  • Re: [help] 1 cpu to rule them all
    ... >> configuration and maintenance in one place is a lot more economical than ... it isn't the price of the hardware that makes it ... > You can make things easier by having lots of machines that are virtually ... > directories) on servers. ...
    (comp.os.linux.hardware)