How can I do??

[Joao]

Hello all,

When my communicator lose connection with a PLC, all my inputs become “—“, but I have problems with my boolean variables that I use the formula GetBit(), because at this moment, all of them become 0.
How can I modificate the GetBit() formula, case I lose my connection, the boolean variables keep the old values?

something like:

double GetBit(double val, int n)
{
If (val == null)// or (val==”—“) <<<<< I dont know how can I do this
{
return (Cnl);
}
else{
UInt64 uintVal = (UInt64)val;
return (uintVal >> n) & 1;
}
}

or something like:

double GetBit(double val, int n, int ChannelNumber)
{
If (getCnlData(ChannelNumber)==null)
{
return (Cnl);
.
.
.

Thanks!!

• This topic was modified 6 years, 11 months ago by Joao.

[Mikhail]

Hi,

In the formula of input channel use, for example: GetBit(Val(101),0); Stat(101)

[Joao]

It works, but the boolean value become “—” too.
The Automatic Control Module read it as 0? I will have problems if I have a trigger with the condition val=0?
Or I have to change the status condition too?

• This reply was modified 6 years, 11 months ago by Joao.

[Joao]

For me its better the boolean input keep the old value…

• This reply was modified 6 years, 11 months ago by Joao.

[Mikhail]

In this case something like that:
Stat(101) > 0 ? GetBit(Val(101),0) : Val()

[Joao]

Thanks Mikhail!

[Author]

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