Flex727
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Posts posted by Flex727
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No, there is not, but you can look at the file name for the .vlp file loaded in the PLC in INFO Mode and compare it to the file name of the program you were given. That may help you some.
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Do you have something plugged in to the serial port 1?
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One method is to "Port Forward" ports 3335 (for going online with the PLC), port 22 (for downloading from UniLogic) and port 8001 to the IP address of the PLC.
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If there is no way to set Port 2 to RS 485 (and I believe this to be the case for the V280, at least in the case for Leyke_1970), then obtain a V200-19-RS4, pop the back off, remove the knockout for Port 3, and insert the module. It should be easy-peasy.
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35 minutes ago, Cam said:
Remove the Snap I/O module and then using a flat blade screw driver remove the back portion of the V280's case. There should be two sets of jumpers beside one set will control RS232/458 for port two the other set will control the RS485 termination for port 2.
See page 8 in the linked.
https://www.unitronicsplc.com/wp-content/uploads/2015/12/V230_260_280_290_INSTAL-GUIDE_12_15-2.pdf
I'm questioning that portion of the document. I think it may apply to the V290 only and not the V280. Unfortunately I only have a V290 here in my office and can't confirm on a V280. @Leyke_1970, please report back what you find.
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8 minutes ago, Leyke_1970 said:
To communicate through RS485 with the V280, do I have to purchase the V200-19-RS4 Snap-in module (RS485 comm. board), because comm. port 2 is just not configurable for RS485 on the V280 (which I actually expect, because the name at port 2 only indicates RS232. If port2 is also configurable for RS485, you would expect port2 to be labeled RS232/RS485).
Yes, this looks to be the case. The two serial ports on the V280 are both RS232 and non-configurable. You can install the V200-19-RS4 module to add a configurable serial port for RS485. That module is very inexpensive.
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Very Nice!
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36 minutes ago, TozoM8 said:
Thanks for the replies. I ended up using another laptop side by side.
That's what I do.
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Both the internal buzzer and the screen brightness are Actions. The screen brightness variation available is what it is - you can't turn it off if zero is not off. Maybe it varies a bit from unit to unit. I know the Vision is similar in that at the bottom of the range it can vary a bit.
You can associate a screen touch with the buzzer in Actions (as you can in Vision), but you also have to turn it off, IIRC. Just use the touch bit (positive transition) to SET a bit for the buzzer and set a different bit when the touch is off (negative transition) to stop the buzzer (or use a TE timer).
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Why aren't you using the USB port on the PLC?
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Once you have VisiLogic installed and running, open up the Help file and go to the Contents tab, then Getting Started, then Downloading/Uploading a Project and read that section. If you have questions, we'll help.
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Hide all the HMI numeric entries except the first one. Use the "Legal Entry bit to unhide the next numeric entry in turn until all entries have been made (use ladder logic to have the hide bit turn off when the legal entry bit turns on) .
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You need a coil at the end of rung 9, then a contact of that coil at the beginning of rung 10. But as I said, in your case there is no need to break this up as you have not even come close to exceeding the maximum number of items in a single ladder rung.
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If your PLC is on all the time, you can just compare SI 37, and when it equals 1, then it is the start of a new month. If the PLC is not on all the time, simply store SI 38 to a MI, then compare to SI38 on power up, and if different, reset your data.
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It might be better to help you if you post your program here and tell us which MI & MB are not retaining their values. We can then explain why and how to fix it.
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6 hours ago, Ngaruiya said:
Anyway in that case shall have to purchase a PLC before proceeding with any programming.
I realize it might be more difficult if you're new at it, but I usually have a substantial amount of programming completed on a project before I load any code in a PLC.
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In that case you do not want a signed constant there. You want another MI that you enter the value on the HMI screen. A constant is just that -constant. You cannot change it at run time.
When you double click on your signed constant (the one there with the red box around it), select the "Direct" tab, then you can enter an MI to use there and on your HMI screen.
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7 hours ago, Antal said:
How many items can be maximum in one Rung? Input conditions.
I don't know the answer to this question, but I guarantee it is WAY more than you have in this example. I wouldn't worry about it. I'm sure it would give you a compile error if you exceed the limit, and even if you did, it is very simple to break things up to get under the limit.
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You can download the compressed firmware file to your computer hard drive, then transport it (via email, the cloud, or whatever is available) to another computer that has an open USB port. There, you can extract the .rar file to use for your PLC upgrade.
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We can help you better once you have some of the basics under your belt. Unitronics has a lots of tutorials and videos on YouTube. There are also lots of example projects that came with your VisiLogic installation. Further, browsing the Help file can be very useful for learning. For YouTube videos, you might start here:
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As long as there is a good battery installed, all the memory in the PLC is retained exactly as it was when it was powered down.
If the PLC is not doing what you want on power up, you might want to post your program here and explain what it is you're trying to do. We'd be happy to help.
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No, there is no software simulator, however, you can purchase a Jazz or M90/91 PLC for less than just the software simulator might cost you with other PLC manufacturers.
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It sounds like the PLC is requesting a firmware upgrade to match your version of UniLogic. To do that you need a USB thumb drive (min 8 GB) to load the firmware on from UniLogic. After the USB drive is loaded, you then insert into the PLC for the upgrade.
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22 hours ago, Flex727 said:
I'm going to say this program wins the all-time award for most creative use of element connecting lines. Here is my favorite:
By the way, there are as many ways to program as there are programmers, but here is how I would have done that logic:
Unless it's something very, very simple, you should avoid multiple coils in a single ladder rung. And that is a good general programming technique - work backward from coils to contacts. Determine all the conditions that would activate a coil and place them in a ladder rung. This also helps to prevent placing the same coil in multiple rungs, which is a major no no.
Visilogic program compare online vs offline
in Vision & Samba PLC + HMI Controllers & VisiLogic Software
Posted
Didn't you just ask this question last month?