adccommunitymod (AutomationDirect) asked a question.
Created Date: April 04,2006
Created By: tubularfab
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Ok, I have never worked with PLC's before, but since I understand both the electrical side and computer programming (thus logic) I think I ought to be able to figure this stuff out on my own. I recently acquired a 1960's era mandrel tube bending machine with a recently installed Koyo 205 series PLC controlling it. It has the 240 cpu, 2 relay input boards, and 2 output boards. It currently uses an archaic mechanically adjusted limit switch to control bend angle (which tells it when to turn off a solenoid powering a hydraulic ram that provides the bending force). It has no provision to read an actual bend angle. I would like to add a rotary encoder and a means to digitally enter a bend angle in .1 degree increments. I'm guessing I'll need a counter module to read the pulses from an encoder. That seems straight forward neough. But I would like to have a digital screen that shows actual bend angle and a programmable target angle. Or just one readout that could toggle between the two. I could use a dial or up/down buttons to set the desired bend angle. I don't need a big touchscreen, etc. What suggestions could anyone give on how to do this? Where is a good source of info on it? Also, how do I go about downloading the current program from my plc? I would like to use that code and simply add to it. Thank you, Jason
Created Date: April 04,2006
Created by: jackson
Go to the Operator Interface section of this website and look at the Cmore panels. They will do what you are looking for at a decent price.
To get the project out of the PLC, you will need to get the DirectSoft programming software (under the software section of this website) and a D2-DSCBL programming cable. You should then be able to pull the project out (providing there is no password in the PLC).
Created Date: April 04,2006
Created by: marksji
There are cheaper display solutions than the C-More Jackson suggested, but having been down that road myself go ahead and spend the extra $ on a small touch screen. The extra up-front expense is a LOT cheaper than the time it takes to get the other options to work.
Created Date: April 04,2006
Created by: tubularfab
Ok, I have never worked with PLC's before, but since I understand both the electrical side and computer programming (thus logic) I think I ought to be able to figure this stuff out on my own.
I recently acquired a 1960's era mandrel tube bending machine with a recently installed Koyo 205 series PLC controlling it. It has the 240 cpu, 2 relay input boards, and 2 output boards. It currently uses an archaic mechanically adjusted limit switch to control bend angle (which tells it when to turn off a solenoid powering a hydraulic ram that provides the bending force). It has no provision to read an actual bend angle.
I would like to add a rotary encoder and a means to digitally enter a bend angle in .1 degree increments. I'm guessing I'll need a counter module to read the pulses from an encoder. That seems straight forward neough. But I would like to have a digital screen that shows actual bend angle and a programmable target angle. Or just one readout that could toggle between the two. I could use a dial or up/down buttons to set the desired bend angle. I don't need a big touchscreen, etc.
What suggestions could anyone give on how to do this? Where is a good source of info on it?
Also, how do I go about downloading the current program from my plc? I would like to use that code and simply add to it.
Thank you,
Jason