Flex727
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Posts posted by Flex727
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I think it's unlikely we'll ever see a software simulator from Unitronics. Their programming software is free and the PLC hardware is less expensive than most other manufacturers programming and simulator software. Just pony up for an actual PLC and you'll be amazed at how well it works as a simulator.
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Moved to the correct forum.
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35 minutes ago, Mia said:
So I should use the auto-tune one and just insert the PID values myself?
Yes. The PID Config without Auto-tune is an older version that remains there for non-Enhanced Vision products. Your V570 is an Enhanced Vision product and should use the PID Auto-tune FBs. Besides the P, I, & D, be sure you enter values for:
Sample Time
Process Value Low & High
Control Value Low & High
and of course, target value.
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Oh, I see I may have misinterpreted your question. You would still use the PID Auto-tune even if you don't plan to use the Auto-tune functionality.
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Assuming you are using a Vision PLC (you also posted this question in the UniStream forum), then you can always determine and set P, I, & D, with or without Auto-tune. When you set up the PID Configuration, you assign operands to the P, I, & D. Just manually place values in those operands, either through HMI entry or Power-Up and you are good to go.
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Why did you update U90Ladder?
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Why are you updating the O/S?
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1 hour ago, Trevor J said:
Also the R/W mix I have not tried,
To my knowledge, Ausman is correct. This function is only applicable when communicating between Unitronics Vision PLCs (doesn't work with UniStream either).
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There are example projects - you just have to download them separately. Go Here:
https://unitronicsplc.com/Download/Support/UniLogic/UniLogic_Example_Projects.zip
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Moved to the correct forum.
It looks like the help file could be a little more clear, but the bottom line is that the Vector: Store function always overwrites the register or bit at the location A+B. It will only overwrite A if B=0.
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Post your project file and we'll take a look.
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Took a quick look at your master program. Using the Legal Entry bit is a good way to go here, but I would do it this way. You have a lot of superfluous stuff you don't need (timer, etc).
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42 minutes ago, Joe Tauser said:
I need to light a smoke and take a look.
I've been meaning to ask you, Joe. Do you have a preferred cigar brand?
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48 minutes ago, dhuggins88 said:
Yours ain't too shabby either, Flex! I have noticed that you like to have more of a bread crumb approach..but all you gotta do is follow em!
You're too kind. My approach, as is most of the other experienced members on this forum, is not just to answer questions, but to teach. More education helps the user and anyone else browsing these boards. I could have written your program for you in about 2 minutes flat, but you would not have benefited as much. We all learn best while doing, not watching.
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26 minutes ago, dhuggins88 said:
I hope Joe T or Aus comes by and chimes in.
Me too. Their input is the best on this forum.
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I haven't had time to review your code yet, but I'll make a general statement. Typically there isn't an easy or elegant way to have a master control in two different places. In any system there can only be one master if you want straightforward code, at least in my experience. If you need two different masters controlling the same thing you generally have to think it through very carefully and the algorithm will have to be tailored to the exact situation. You have to deal with communication timing and register overwrite. It can easily become a mess, especially if you don't fully understand the underlying mechanics.
If someone smarter or more experienced than me comes along with elegance, I am definitely interested in learning along with you.
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You will also need to know the PLC name to connect with VisiLogic. That's also available from INFO Mode.
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-You don't need anything in the bottom part of the MODBUS Configuration in the slave.
-You really don't need anything gating your SCAN_EX FB in the Slave. Just hang it directly on the left rail.
-Place your MB 0 (Ready to connect) after you MODBUS Configuration, not before. You're NOT ready to connect until you've configured your MODBUS communications. It doesn't really matter since the config does occur before MB 0 gets used, but it's the principle of the thing.
-Use a Direct Contact of SB 13 instead of a Positive Transition of SB 3.
-You don't really need the delay timer TD 0.
None of these things would stop your program from working, but I'm trying to help you with best programming practices.
58 minutes ago, dhuggins88 said:It's actually pretty straight forward now that I see it.
MODBUS is simple and straightforward. It's also very universal. I use it whenever possible. The only thing you have to watch for is getting all the details right. Once you've done that it's smooth sailing.
Feel free to ask about any of these suggestions if you're curious.
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21 minutes ago, gerard339 said:
I am using an ordinary patch cable as the exl-cab295 doesn't work.
Just for clarity to everyone following this saga. The EXL-CAB295 is for the EX-A2X, NOT the EX-A1!
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I know this is a stupid question, but I've been caught by this. Do you by any chance have an Ethernet module installed in the PLC and is there any chance you're plugging the expansion cable into the Ethernet port instead of the expansion port?
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Store the value in a temporary location immediately after transferring it. Compare the new value to the stored value (+/-5). When the new value is greater than stored value +5 or less than the stored value -5, then send the new value and store it again to the temporary location.
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On 8/8/2019 at 5:21 PM, dhuggins88 said:
I apologize for not answering in complete sentences.
I just caught this. Sorry, I was referring to your rung comments in the PLC program.
Have you had any luck in getting a single slave to communicate?
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Confirm that you are using the correct cable (it's not the same cable as that used with the EX-A2X) and confirm that you are plugging the correct end of the cable to the module and the correct end to the PLC (the cable can only be oriented one way). Also, confirm that the I/O modules are identical, and in the same order, as in the hardware configuration in the PLC program.
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21 minutes ago, dhuggins88 said:
I went in to all the Socket Parameters on the slaves and everyone of them show socket 0 and port 20000 which is not even close to being correct.
What does "I went in to all the Socket Parameters" mean?
In my post above I was suggesting you use Socket 2 in the slaves and initialize to 20261 - 20263. It doesn't matter which socket you use as long as the port number is correct. Also make sure they're all initialized to TCP Slave. The default for Socket 0 is UDP.
My other suggestion is to limit your code to a single slave and get that working properly before trying to tackle communicating with 3 slaves simultaneously.
There is no way to insert P and N contacts
in UniLogic Software
Posted
Is this a UDFB? If so, keep in mind there is no retained memory of local variables after a UDFB executes. Transition contacts require retained memory in order to know a transition occurred.