Re: [foxboro] How to reverse a 16 bit register - PAKIN


Sorry, I didn't read your original request all the way through and I do see
that you mentioned the use of an IIN block already.

You mention minimizing block usage, but I'm not sure you're taking that
much of a hit by using the IIN -> MCIN approach.  If you don't have the
desired option with the PAKCIN block, then this might be the most efficient
way.


Steve



foxboro-bounce@xxxxxxxxxxxxx wrote on 03/31/2009 01:44:24 PM:

> We can use the IIN DCI block, but then we need an additional MCIN to
> breakout .CIN_1-16 to CIN's, etc.
> I don't believe there is a way to connect a CIN to a bit within the IIN.
> We want to minimize our block usage.
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx
> [mailto:foxboro-bounce@xxxxxxxxxxxxx]On Behalf Of
> steve.shimp@xxxxxxxxxxxxxx
> Sent: March 31, 2009 11:38 AM
> To: foxboro@xxxxxxxxxxxxx
> Subject: Re: [foxboro] How to reverse a 16 bit register - PAKIN
>
>
>
>
> Is it possible to use an IIN DCI block?  If so, the block point
parameters
> can be configured to do exactly what you're looking for...
>
>
> Steve
>
>
>
> foxboro-bounce@xxxxxxxxxxxxx wrote on 03/31/2009 12:49:45 PM:
>
> > We are converting gateways to FDSI. We need to reverse a two byte
> > register (Bits 1 to 16).
> > Our goal was to insert a PAKIN upstream of our MCIN & CIN, which
> > used to read the MDSCAN.
> > Below is from B0193AX - PAKIN, which reverses Bits 1 to 32 only.
> > PKIOPT
> > Packed Input Option is a short integer input that specifies whether the
> > input bit stream from the device is packed in the PAKCIN output
parameter
> > with or without reversing the bit order as follows:
> > 1 = No bit reversal (Bits 1 to 32 are mapped bit-by-bit to Bits 1 to
32)
> > 3 = Bit reversal (Bits 1 to 32 are mapped bit-by-bit to Bits 32 to 1)
> >
> > Where is 2 = Bit reversal (Bits 1 to 16 are mapped bit-by-bit to
> > Bits 16 to 1)????
> >
> > We are trying to emulate the MCIN blocks IOMOPT = 2, which allows
> > reversing 16 bits.
> > One option we found is the IIN block to read the register directly,
> > then connect to a MCIN to allow bit selection - poor use of blocks.
> >
> > Thanks,
> >
> > bud/
> >
> >
> >
> >
> >
> > _______________________________________________________________________
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>
>
>
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>
>
>
> _______________________________________________________________________
> This mailing list is neither sponsored nor endorsed by Invensys Process
> Systems (formerly The Foxboro Company). Use the info you obtain here at
> your own risks. Read http://www.thecassandraproject.org/disclaimer.html
>
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