[Emc-users] FW: Classicladder counter

[Chris M. <chr...@ho...>]

From: chr...@ho...
To: tj...@ca...
Subject: RE: [Emc-users] Classicladder counter
Date: Wed, 30 Jul 2008 06:22:22 +0000








Hi Terry

If you use use variable %C0.V in a  compare block  It will tell you what the current number is in the counter.
eg.    ---------[%C0.V=4}----------(Q1)

You can also set the value of the counter using the same variable in an equate block.
eg. |B1|-----------------------------[%C0.V=4]

You can export the counter number to a HAL component by using an equate block to assign it to a S32out word variable. But you have to set up the realtime module to create S32 in and out pins . ( I don"t think this was what you were asking though If it is then I will tell you how if you need)

If you want to reset the counter to zero then the reset pin is the way to go otherwise to set to another number (say 1) then use preset and assign 1 to the preset  property.
 
Have you read this?
 http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ClassicLadder

Chris Morley




> From: tj...@ca...
> To: emc...@li...
> Date: Tue, 29 Jul 2008 22:18:31 -0700
> Subject: [Emc-users] Classicladder
> 
> 
> 
> Hi,
> 
> I have a tool changer that needs to be homed each day(at least it
> did with the origional control),because it has no encoder--it counts
> revolutions on the gear motor that is driving the magazine,one rev of
> the motor is one tool station advanced.There will be a counter in classic
> that would watch this gear motor switch.
> 
> There is a prox switch for homing the magazine 
> 
> This is my plan for the homing:
> 
> A push button switch that the operator would hold down (or a timer to keep it 
> going after momentary closing) for at least one rev of the magazine,prox switch
> gets made at some point on this one revolution.
> 
> Would the rung that reads the home prox switch go like:
> 
> a NO contact(home switch input) on the left side and this will go to
> the R (reset?) input on the counter block?
> This input needs to reset the counter
> 
> I looked through the examples in the download of classicladder on the 
> sourceforge and there was no examples of the counter being used that I saw
> 
> 
> and the switch on the gear motor doing the counting:
> 
> NO contact on the left and this hooks to the U(up counting) input on the counter ?
> 
> Is the value of the counter usable in a compare block?
> 
> Thanks
> 
> Terry
> 
> 
> 
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