As the simplest first step, you could try powering off the PAL, then
back on in case it is froze on some mixed signals.
My PAL runs fine on any com port as long as it is specified in
configurator. In fact my com1 port mysteriously failed and I used a USB
to RS232 adapter to create a new com port (com 4), and that is what I
have been using for over a year. You could try a different port or
verify the right port is specified in isodat. Just because the PAL
loader talks to the PAL, it doesn't mean isodat will. They are
different programs that each require specification of what port to use.
You have to enter "advanced mode" in configurator and A200S is the PAL.
There you can specify the com port.
Also, as Gerry mentioned, the AS method you choose to use in isodat
needs to be properly configured through the PAL keypad. In the method,
the right syringe needs to be selected. Then you need to make sure you
have defined the tray, tray holder and vial.
I have never had to alter the acquisition script to get the PAL to fire.
Hope this helps,
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of Gerard Olack
Sent: Friday, December 07, 2007 12:20 PM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] GC Pal and Isodat 2.0 (service pack 2.63)
One other thing we ran into--the PAL has to be on Com1 for Isodat. We
tried to switch one to run off Com2 (changed it in config, etc.), but
couldn't get it to communicate. GC works ok on Com2. If you have two
Pal's on one instrument, use a switch box.
If PalLoader works, then the computer is talking to the Pal and there's
no wiring issue.
Stan Klonowski wrote:
> Suzan and others,
> I am having the same problem. I have checked and triple checked all
> the standard problems. Syringe, methods, com ports and the autosampler
> still will not fire. I tried altering the line in the script code but
> that did not seem to help. I admit I am at a loss.
> I can see that the software communicates with the pal but there seems
> to be no response from the pal.
> On 06/12/2007, *Gerard Olack* < [log in to unmask]
> <mailto:[log in to unmask]>> wrote:
> HI Suzan--
> The "time event" list in the method doesn't talk to the PAL. It's
> trigger for the carousel type "autosampler" for solid samples,
> e.g. the
> Costech "zero-blank".
> The communication with the PAL is in the Sequence itself, under AS
> Method, where you pick the "Internal No. 9" program that's in the
> and named AS200-9. Isodat will start the PAL after the peak
> (if you're doing that), no matter what unless you reprogram it
> Don't forget to have the correct syringe in place for the PAL
> use a valid "AS Number" (also in sequence), and have "Tray 1"
> defined in
> the PAL to be the tray you're using.
> good luck
> Suzan Verdegaal wrote:
> > Dear Listmembers,
> > I know that there has been communication on this forum about a
> > problem before, but all the solutions that have been giving do
> > seem to help with my setup (or I am missing something).
> > I have installed Isodat 2.0 and Service pack 2.63 on a new
> > that it connected to the TC/EA and DeltaPlusXP. The Pal Loader
> is also
> > installed and with this software I could see that the GC Pal is
> > connected to COM1 and that they are communicating. In the
> > configuration I connected the Conflo-liquid (also COM1) to the
> > configuration. In the Time Event List there is a column for
> > autosampler and one for Elemental analyser on. I gave a start
> > autosampler command at 60 seconds in the list. During a run I
> can see
> > that Isodat gives a command (Inject sample 1), but the GC Pal
> > silent.
> > I hope somebody can tell me what I should do (or try). I read
> stuff on
> > Isogeochem about changing computer langues in scripts or
> changing from
> > acquisition to acquisition-old in the method, but I am not sure
> > this also applies for the newest service pack. Please let me
> > you have had the same experience.
> > Thanks.
> > Best regards,
> > Suzan Warmerdam
> > Free University Amsterdam