Dl06 rll+ gurus

I am trying to write a stage logic using AD DL06.I have attached what i have started. For some it might look silly or wouldnt even make any sense. And for others I might look like I have no clue. But i am very interested in learning. So I thought i might post it and ask experienced people out there for some serious feedback. I would appreciate it.
Khab0501

I think some RLL spilled on your flowchart

At this point, it would probably be helpful to have a description of what the machine you are building is supposed to do. A flowchart would be good, but for now leave out any ladder logic stuff like LDR V2010, OUTD V3000. Include stuff like, "Manually load part", "Press Start", and "Failed Test, wait for user reset".
Also list what is connected to the PLC and how it is connected. It appears that your pressure transducers are connected via serial port? Is your regulator connected the same way? What is Y10? Y7?
More detail on what exactly you are expecting your subroutines to do might help as well. SBR K400 gets a pressure reading; where does it store it? In what format?

Overall, it looks like you have a good start and have thought about your machine in good detail. We will have to understand your machine in similar detail to give good advice on your ladder.

Brian

Brian I have attached the actual flow chart that I started with.
yes the pressure transducers are connected via serial port # 2 and so is the PID Regulator. Y10 is the Pneumatic ON/OFF since we are using a air regulated pump. Y4,y5,y6,y7 are solenoid valves to control the flow. An HMI is used to input the data for the parts and read the Pressure out of the transducers. 2-push buttons are to start the test. One E-stop and 1 RESET and 2 flashers which tells the operator that the Process is taking Place.
Regards

The END statements in stages S410 and S500 would, in a running program, terminate the scan right there. The END statement will be at the end of all regilar ladder logic but before interrupt processing and subroutines.

bernie_carlton said:

The END statements in stages S410 and S500 would, in a running program, terminate the scan right there.

Click to expand...

Only if those stages were active. However, as you say, they don't make sense there.

Also, unless he is directly activating stages from the HMI, the only stage that will activate is the ISG. With no jumps or sets, none of the other stages will run.

BTW Khab, what is connected to your analog output card? Also, the new (old) flowchart is much clearer as to the operation of the machine.

Brian

I think one of the first things I would do on this project is to get the PLC talking to the pressure transducers. You should be able to do a continuous polling arrangement to request new readings as fast as they can respond. That being said, I don't have a lot of experience with the ASCII commands used with the serial ports. I think bernie may be of more help with this part. He has a nice method of chaining stages together for serial comms that works very well.

Brian

I am sorry Brian, the analog output card is controlling the PID Regulator

here is a "basic idea" thread that might help if you're just getting started with Stage Programming ...

http://www.plctalk.net/qanda/showthread.php?p=41722&postcount=15

this will be most useful in a "sequenced" operation where one thing happens – and then another – and then another – and so on ...

for something that needs more than ONE thing to happen at a time, the approach in the figure below might come in handy ... basically you can have several "tracks" of logic operating in parallel ...