Aram
You should be able to put in a formula in any input box. Something like 
"if V < value then ...."
I suggest that you install a stand alone classic ladder editor to test 
your script with. It is easier this way to start off with. You can have 
a look at the help to assist you.
The classic ladder software in linuxcnc has a standalone version as well 
that is offered by the original author.


On 2014-07-28 07:34, a k wrote:
> Hi
> Dave
> interesting does Classic Ladder has ability to read float number - like
> value of electrical current -- that can fluctuate ( read output some some
> sensor etc) , do calculation and make output also float number - like any
> value between 0  +5 V DC ?
>
>
>
> thank you
> aram
>
>
>
>
> On Sun, Jul 27, 2014 at 8:16 PM, Dave Cole <[email protected]> wrote:
>
>> Aram,
>>
>> I don't understand what you want to do but that welder has a very
>> limited duty cycle.
>>
>> If you weld continuously it will overload and shutdown in less than 15
>> minutes.
>>
>> I use PLCs all of the time and know the RS 500 controllers and
>> software.   The AB controllers are much easier to use if you have to
>> write more than about 25 rungs.  Siemens S7-1200 controllers are even
>> easier to use.  If you need something less than about 25 rungs Classic
>> Ladder works fine.   Obviously Classic Ladder has a huge price
>> advantage.  :-)
>>
>> You can use the 7i37 digital I/O with Classic Ladder if you have any I/O
>> points left.
>>
>> Dave
>>
>>
>>
>> On 7/27/2014 4:28 PM, a k wrote:
>>> hi
>>> i am working on 2nd part of my project which is integration of
>>> metal depositor what will be welter like this
>>> http://www.harborfreight.com/90-amp-flux-wire-welder-68887-8494.html
>>>
>>> i will need some plc that can control cnc machine with 0 --5V DC
>>> and control speed of welder.
>>>
>>> Current (A amperage) of welding process -main parameter.
>>> can i use input power parameter -- 110 V AC 20 A - to estimate current of
>>> real time welding process?
>>>
>>>     I know some rs 500 logic -
>>> is using of EMC2 Classicladder to integrate welder and cnc mill good
>> idea?
>>> i want to keep existing cnc mill as a separate unit .
>>>
>>> if i will use EMC2 Classicladder only as a integrator of welder to
>> existing
>>> cnc mill what board/s do i need - hardware ?
>>>
>>> i have 2nd set mesa 5i20/7i33/7i37-- use them or there is something
>> better?
>>> thank you
>>> aram
>>>
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Regards /Groete

Marius D. Liebenberg
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+27 12 743 6064
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