Nothing to unplug- it's a built-in RS232 DB9. Nothing enumerates across it.
I'm baffled where to go. I see there's a port /ttyS0 from the command line.
Launching LinuxCNC from the command line shows text warnings about
Modbus timing out. It's just not communicating. I played with the
loadusr command and recompiled the code with /ttyS0 as the new default
if the command line option didn't take somehow.
I'm pretty sure the x200 code and libmodbus are not the prob- something
about config? I don't know where to look. I suppose the RS232 port
itself could physically be busted, I could look at it with a logic
anaylzer. Be nice to see if anything was trying to come out. I don't
think it could be putting out valid traffic, if it did it I think the
VFD would turn on.
Hmm, it is going through an isolated RS232-MODBUS bridge. But that and
the cable and VFD are known working. I put the cable back on the other
machine and it works.
I guess I could install a putty terminal and see if I can send UART
traffic in and out to verify the port is working.
Maybe I could give up on the built-in RS232 and try a USB FTDI to RS232?
Danny
On 4/9/2022 3:16 PM, andy pugh wrote:
On Sat, 9 Apr 2022 at 16:44, Danny Miller <dan...@austin.rr.com> wrote:
I tried specifying the port loadusr x200 device="/dev/ttyS0". I'm not
sure how my serial ports are named. Would "/dev/ttyUSB0" be if that was
an FTDI USB to serial device?
Plug and unplug it, see what appears and disappears in /dev/
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