Re: [foxboro] Read back feature of FBM233 with OPC

Am 18.10.2008 um 00:00 schrieb Doucet, Terrence:

> When you use an IA output, it will write to the entire word in the PLC 
> that it is connected to. The PLC word must be under the control of one 
> MASTER only. If the PLC must write to bits in this word, you must send 
> the state to an IA input block and then connect the IA bit in the 
> input parameter of the IA output block.
>
> I do not believe that multiple MASTER's are permitted.
>
> Terry
>

It does work with the IOUT and the ROUT block. If the PLC sets bit #5 
for example, the number in the IOUT is increased by 16. I can then set 
bit #8 by increasing the IOUT by 128. This does not reset bit #5.
In the other PAKOUT case, in5 is TRUE while I set in8 and the same 
"number" is written to the PLC as seen in the PAKOUT parameter. But 
then in5 is reset.

And why does bit #32 freeze the block?

Joachim

 
 
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