Zelio FBD help

Zimmer · Jul 8, 2011

Just a bit stuck here ?

I enclose a program I did a while back (with assistance from here

) of a two pump control where Pump 1 starts first, and is followed by Pump 2 when float 3 becomes active.

My program works fine, but I would like to introduce a new input I4, which when active would cause Pump 2 to "lead" followed by Pump 1 when float 3 becomes active.

i.e reverse the running order of the pumps, when I4 is active.

Any tips guys/gals on a good way to do this ?

Thanks

Zimmer · Jul 10, 2011

Nobody ?

iant · Jul 11, 2011

Simple
Use Input 14 to Swap Outputs (change over)
so if 14 is on and Output 1 is called output 2 will come on
adn if output 2 is called output 1 will come on instead

Zimmer · Jul 11, 2011

iant said:
Simple
Use Input 14 to Swap Outputs (change over)
so if 14 is on and Output 1 is called output 2 will come on
adn if output 2 is called output 1 will come on instead

Thanks m8, thats what I want to do, but I'm new to this.
How do I achieve the changeover using fbd, so that
I4 ON = changeover
I4 OFF = normal as per diagram.

Where will I do it
after the And blocks ?
and what will I use

Thanks

iant · Jul 11, 2011

bit hard to explain with out the software.
change your existing outputs (Q1, Q2) to auxillary outputs (Bx, By)
if (bx and I4) OR if (By and not I4) then Q2
if (By and I4) OR (bx and not I4) then Q1

write this logic

Zimmer · Jul 11, 2011

iant said:
bit hard to explain with out the software.
change your existing outputs (Q1, Q2) to auxillary outputs (Bx, By)
if (bx and I4) OR if (By and not I4) then Q2
if (By and I4) OR (bx and not I4) then Q1

write this logic

Thanks again m8, but it's creating the aux. output I seem to be having a problem with. In ladder it's fine, but in FBD ?.
I understand the AND block and I have the I4 connected to it, but I don't know how to create an "aux output" which has an output to connect to the "AND" block.

Zimmer · Jul 11, 2011

Still don't know how to do aux. outputs, but I think this works

iant · Jul 11, 2011

youll need to read the manual
I suggest - for now use a couple of other outputs

Zimmer · Jul 11, 2011

iant said:
youll need to read the manual
I suggest - for now use a couple of other outputs

but it's working

iant · Jul 11, 2011

cool - i was posting aas you were -
then the old antage rings true
if it aint busted dont fix it.

iant · Jul 11, 2011

by the way
check the manual - in the software
"Creation of Links Between Function Blocks"
that is why there is no aux relays - they are not needed.

Zelio FBD help

Zimmer

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Zimmer

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iant

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Zimmer

Lifetime Supporting Member

iant

Lifetime Supporting Member + Moderator

Zimmer

Lifetime Supporting Member

Zimmer

Lifetime Supporting Member

iant

Lifetime Supporting Member + Moderator

Zimmer

Lifetime Supporting Member

iant

Lifetime Supporting Member + Moderator

iant

Lifetime Supporting Member + Moderator

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