Hello Andy,


Thanks  for  that,  just tried it via Remote Desktop and it appears to
open  port  6  as  requested  fine. But at the designated OFF time the
whole  programme appears to close, is that as expected? I assume prior
to  that  the  port  changes  state  back again? How would you suggest
controlling  an  industrial  single phase contactor? What I want to be
able  to  do is turn on my huge Farnell H50/60 linear power supply via
the  mains  input  at  a given time, and shut it down again at a later
time. It can draw up to 16 Amps constant with a BIG inrush current, so
I  guess  electro  mechanical  switch  is the cheapest option? Thanks
again,  and  thanks  Stefan  re the tip to try Spectrum Lab! (Is there
anything SL cannot do? ;))

Wednesday, April 11, 2018, 12:22:32 PM, you wrote:

> Just in case it matters, I initially test for all valid COM ports
> by opening and closing each in turn,  then testing for an error.   
> If that causes problems to anything on another port that has not yet
> been opened, like another PTT control,    it will briefly 'blip'


> Any COM port already open will get rejected by this test so no adverse effect there.



> Andy



> On 11 April 2018 at 12:18, Andy Talbot <[email protected]> wrote:

> Try this
> http://www.g4jnt.com/DropF/simpletimer.zip



> It lets you abort the on time using the [esc] key


> Source code is in there as well 



> All in PowerBasic, command line compiler version
> (By far the nicest way to programme simple things that don't need whizzy windows interfaces)


> Andy

--
Best regards,
 Chris                            mailto:[email protected]