Re: [foxboro] String 2 ASCII
- From: Kevin Fitzgerrell <fitzgerrell@xxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Sat, 19 Jun 2010 18:11:48 +0900
I'm pretty sure there is no function built in to do the conversion for you.
I'm fairly sure Foxboro didn't think there was any need for a control system
to have much in the way of string and conversion functions available.
What modbus device are you sending history records to?
Regards,
Kevin
As far as example subroutine, I don't have one handy, but it's really not
that hard. Just long.
On Sat, Jun 19, 2010 at 5:20 PM, Ahmed K. Sayed <a.sayed@xxxxxxxxxx> wrote:
> Isn't there any function or example subroutine that can convert char
> into ASCII codes in HLBL (IND blocks)?
> I think I can manage the arrangements for the ASCII codes later for
> sending over MODBUS once having them in the first place.
>
> Running scripts over AW is not preferred idea here; the history of the
> MODBUS device will depend on the ASCII codes I'm sending for records.
>
> Khaled
>
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of Kevin Fitzgerrell
> Sent: Wednesday, June 16, 2010 3:16 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: Re: [foxboro] String 2 ASCII
>
> OK, I see where you're going. I'm not sure you can do it in the I/A
> side
> though. You can pull the "D" out of your string using subset of your
> string
> in hlbl on an independent block, but I don't think you can access the
> bit
> pattern for the D. It remains a type string and references as value 0 I
> believe.
> If you send the string from I/A to a script/program on the AW then this
> becomes trivial. But then, a lookup table in an AW side script/program
> is
> also trivial. If he needs to keep this in the CP it's more challenging.
>
> Cheers,
>
> Kevin
>
> On Wed, Jun 16, 2010 at 8:23 PM, Brown, Stanley <
> stan.brown@xxxxxxxxxxxxxxxxx> wrote:
>
> > The "D" is stored in memory somewhere. Given that, Thus it is a bit
> > pattern. Looking at the OP first article, it appeared to me that what
> he
> > needed was just the 2 ASCI chars packed into a 16 bit Modbus register.
> Using
> > string manipulation routines, you should be able to get access to the
> byte
> > the "D", in your example is stored in, right? Then it's just a matter
> of
> > packing the upper and lower character into one 16 bit register.
> >
> > Does this make sense?
> >
> >
> > > -----Original Message-----
> > > From: Stan Brown [mailto:stanb@xxxxxxxxx] On Behalf Of Kevin
> > > Fitzgerrell
> > > Sent: Wednesday, June 16, 2010 7:10 AM
> > > To: foxboro@xxxxxxxxxxxxx
> > > Subject: Re: [foxboro] String 2 ASCII
> > >
> > > I did look up the ascii man page, but I must be dense, I don't see
> how
> > > to
> > > mathmatically convert a "D" for instance to an ascii code number
> > > without
> > > using some kind of lookup/case/if structure.
> > > Can you elaborate?
> > >
> > > Cheers,
> > >
> > > Kevin
> > >
> > > On Wed, Jun 16, 2010 at 7:17 PM, Brown, Stanley <
> > > stan.brown@xxxxxxxxxxxxxxxxx> wrote:
> > >
> > > > Google is your friend. Try "ASCII table"
> > > >
> > > > Sent from my iPhone
> > > >
> > > > On Jun 16, 2010, at 0:50, "Ahmed K. Sayed" <a.sayed@xxxxxxxxxx>
> > > wrote:
> > > >
> > > > > Our platform is mainly XP, where can I find that ASCII manual?
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-
> > > > > bounce@xxxxxxxxxxxxx]
> > > > > On Behalf Of Brown, Stanley
> > > > > Sent: Monday, June 14, 2010 4:42 PM
> > > > > To: foxboro@xxxxxxxxxxxxx
> > > > > Subject: Re: [foxboro] String 2 ASCII
> > > > >
> > > > >
> > > > >
> > > > > Converting the ASCII char to its composite integer
> representation
> > > > > can be
> > > > > done mathematically, therefore you do not have to use a lookup
> > > table.
> > > > >
> > > > >
> > > > >
> > > > > Man ascii on one of your UNIX boxes will show you how this
> works.
> > > Just
> > > > > remember you put 2 chars in each int, as chars are 8 bit, and
> > > Modbus
> > > > > ints are 16 bit.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
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