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Showing results for tags 'real-time software technology'.
Found 155 results
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I'm fairly new to Mitsubishi and I am trying to limit the amount of decimal places of a real value down to 3. I am using a FX3U CPU and the only thing I see in the manual is that real values are stored with approximately 7 significant figures. Is there a way to limit the amount of figures after the decimal point to 3 without converting to an int value? Also does restricting the decimal to 3 points on GT works change to PLC value at all?
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I'm working to fix/improve the functioning of a program running on an a PLC5/40E. I think high Scan Times are a big problem with this current program. ((Backstory: someone added some quasi motion control, and it sort of worked for a while. Now that it's broken, the operators of this machine want it back. )) I'll keep my question simple, PLC5's are new to me: There are 36 rungs with CPT instructions as the sole output, a third of these instruction are executed every scan. I'm going to replace them with MOV instructions. My question is, is there any sneaky PLC5 reason to do a CPT instead of a MOV? Is there a better way to do this? The CPT instructions that execute move integer values to a data file used by the HMI to control the coloration of touchscreen buttons. Thank you for your time. PS: I'm new-ish to this forum, please feel free to let me know if my question was asked correctly or not.
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The CC-Link system on a machine has been intermittently dropping out. Normally the Link Scan Time runs at a solid 87ms. When the system "drops out", the link scan time will increase. Sometimes double, triple, or go up 10x. It happens when the machine is running or when it sits idle. There are 33 stations on the network. The same stations do not always fault but sometimes all of the stations will fault at once (as seen in the attachment pictures.) We have changed the main QJ61BT11N, the processor, the Q62N power supply, the main backplane (base unit), all cards on the main backplane. Is it possible for one station or one of the cables to create a network wide problem? Any ideas thrown at us would be appreciated.
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Please help me how develop totalizer for every 15 mins , for real value. Real value should be taken sample for 1Sec.
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[Tutorials and Quickstarts] - Setting the NB Clock based on the NJ NX Clock
Michael Walsh posted a topic in Download Comments
Setting the NB Clock based on the NJ NX Clock View File This document details the updating of the clock on the NB based on the clock in a Sysmac Controller. Submitter Michael Walsh Submitted 05/14/20 Category Tutorials and Quickstarts -
Setting the NB Clock based on the NJ NX Clock
Michael Walsh posted a file in Tutorials and Quickstarts
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So I have done quite a bit of googling and i even reached out to our integrator but i am having a nuisance fault of "Watchdog Fault" Caused by periodic task overlap. The task is scheduled to start again before it is finished. I added all of the Programs in this task MAX scan time and it only came out to 102 ms. the task is scheduled for every 100 ms. The watchdog is set at 500 ms. The task is currently running at 146-148 ms and i confirmed this using a TON instruction at the end of the task followed by a reset. What can i do to get this down?? What would be the best practice? Move programs into another task? Make the task continuous? What would happen if i did make it continuous? I tried setting the task to 150 ms and the controller DID NOT like that. I was barely able to get back on line with it to change it back to 100 ms. CPU usage is at 91% and this task accounts for around 50% of that. Thank you all in advance for your help.
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Hi everyone! I have a question to all of you guys - do you ever use any software or online tools to manage your automation/electrical engineering projects? I have worked in a number of companies and have seen various scenarios, from using excel tables to run multi-million dollar projects to using proprietary SW for every little tiny project. Unfortunately I do not have experience working for any major big integrator and am very curious how projects are managed at this level (and if every engineer likes the way it is handled). Additional question - does anyone have ever used a software to automatically generate the PLC code? I know some companies develop products to generate the "skeleton" of PLC program and I think it is a great thing to have.
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We are having issue on a machine running kinnetix 5500 drives where we randomly get clock Sync Faults. This particular machine is set up as a slave looking to another PLC(L36-ERM) on a different station of the same machine as the time master. There are about a dozen other PLC's(totally different machines) on the same network and most are set up as masters for their own systems and to my knowledge they have never had this issue. There are also dozens of other devices connected to this network, and then this network is part of the facility wide network.( I apologize if this is a little wordy) We are pretty sure that the slave is finding a more accurate clock on the network somewhere and syncing to it causing the servos to fault. We have tried making both the master, and the local clock of these 2 particular PLC's higher priority than the others to eliminate this with no success. What I am trying to do is track what clock this particular slave is looking at as its master when the clock sync fault has occurred. is there away to do this through ladder logic? it seems like we should be able to get this information and save it so we can figure out who the culprit is.
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I have been able to Jog the opposite direction from a Hardware OT with my 1S servos (using Sysmac Studio). I reset the OT Fault and Job the opposite direction. What I am having trouble with now is, I have set Software Limits and I cannot Jog off like I can with the Hardware OT. I have been told I should be able to do that, but it still does not work. The fault returns immediately when I press the appropriate HMI Job button....which is the same HMI buttons and Logic used when I have the Hardware OT. Has anyone ran into this before? It may be a setting I have not done right maybe?? Thanks,
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Time synchronization of L71 via 1756-TIME
Arizona posted a topic in Allen Bradley / Rockwell Automation
Hello Everyone, I am new at this forum, seeking help from you guys and gals. Scenario: I have a Controllogix 1756-L71 5570 controller installed with 1756-TIME module. The function of time module is to take time from GPS clock module in NTP format and send it to controller in PTP format. All the status LED's on Time module are OK. Also sync LED is Green. Still the time of controller is not synchronized with GPS clock there is a difference of 45 mins. Fellows please help. I'll be helpful. -
Hi everybody,For a while I’ve been wondering, in every plc forum where the use of loops come to discussion I find most people answering that it’s best to stay away from them and that there are better, easier and mostly less scan time demanding solutions out there. Why is that?In my experience they’re the next best thing.Why would referencing data from an array of 40 Dwords using a FOR X:= 0 TO 40 DO loop be any more scan time demanding then the PLC scanning through 40 rungs of statments?Just curious if I’m missing something here. Cheers
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Has anyone had any issues with dirty power or disturbances from Utility that occur duration the night?
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Hello, I used a Schneider Electric SR3B261B PLC to create a trivia machine (as I call it). Basically 20 buttons that let contestants ring in to trivia. There is a display that shows the number of the person who rang in. It works pretty well unless people press the buttons at exactly the same time. Then it shows 2 results at the same time. Usually resulting in a display of 18 when really it was 12 and 14 that rang in, for example. The PLC has options for: "Adjustment of the basic cycle time of the module." and "Type of Hardware Input Filtering." Which I assume would make the PLC operate faster and avoid two inputs triggering at the same time. If I change the setting and update the changes do not keep. I appear unable to change it past 20 x2 ms and slow (3ms). Is that a correct assumption that changing this would fix it? Why can I not change this? Is it because I have so many inputs (14 or so) and Outputs (16 or so)? or because my program uses nearly all 240 lines of ladder logic allowed? What can I do to fix this? Emerald
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SECS (SEMI Equipment Communications Standard)/GEM (Generic Equipment Model) are communication interface protocols for communication between semiconductor equipment and a fab host. Fab host is a software application that is controlling and monitoring equipment processing using SECS/GEM protocol.
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Trying to program production tracking in Do-More 2.3. Need to track current Date, Time of day & current hour. Anyone have an example of how time of day is used? I have done this in Allen Bradley 5000, but this Automation Direct stuff is new to me.
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I am new at PLC programming, I have tried some ways to convert a text into DINT and I haven't found the right way yet, maybe somebody can help me. I want to convert "Hello" to DINT, for example. I tried converting it on here https://www.branah.com/ascii-converter to decimal and then using it as an input for a ROUND, FLOOR, TRUNC blocks to get a DINT, but when I get the result and use as an input in a DI_R i block the output doesn't match with the first conversion of "Hello". Any tips on how do I get it to work, please? Thanks in advance.
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Micrologix 1400 recording off time of a DI
Ryandevlin17 posted a topic in Allen Bradley / Rockwell Automation
Hi, I'm pretty new to allen Bradley and wanted to know if there was a function that could help me out. I have a rotation sensor which feeds back to the PLC via a digital input, once every half second or second once machine is up to speed - I want to record the off time of this DI (how long it is off between pulses, essentially how long it takes for drum to rotate once). Is there some way to record this time and use this value for compare logic? any help would be greatly appreciated. PLC: Micrologix 1400 series B RSLogix 500 version 11.00.00 (CPR 9) -
Hi, i am currently looking for a software that can open .gop-projects so i can look in the code and upgrade some panels at my current customers place. This software and GOP2000 are ancient and have not had any reply from ABB for several days about this. The GOPs here is starting to fail and we only got 1 spare that are in service almost 24/7.
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I am trying to program an analogue output on a Siemens S7-1500 unit from a 4-20ma sourced analogue input scaled over 0-250 degrees. The analogue input will have an adjustable setting in the software for when the alarm status should occur and at this point I want the analogue alarm output to start to process at 4ma, at 5 degrees above the initial set point I want the analogue output value to be 20ma I have no idea how to do this so any help from people is greatly appreciated and advice on which analogue output card to use would be helpful.
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I'm very new to sysmac. I am trying to display the current date and time in the corner of each of my HMI pages. I saw a button labeled date and time. It is asking for a variable for behavior. Do I need to write some basic structured text or FB in plc to get date and time and pass it over? I figured the button would update itsself since when I placed it on the screen it had the current date and time and refreshes every time I leave the page and come back.
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Hello, Could somebody give for me advice how need seperate real number to integer? for example I have in D10 real number 10,9 for me need to do integer number 10 and 9. The real number seperate to integer I am using this LADDER line, attached picture. In D90 I got 10, But how to isolate the number of decimal places,I can not think of. Please help for me
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I would like to capture current date and time to registers in the PLC. I would prefer to use a function block, if possible, since I need to do the capture at different places in the program. I am using a CJ2M. How can I do it?
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Hello Experts, I have recently started to learn about PLC and Industrial Automation. I got Logo Soft Comfort demo software which cannot communicate with the hardware. How/Where (link) can I get a full version 8 of Soft Comfort for free? Thanks.
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Hello. this is my firs post is possible to convert the elapsed time of timer to real or int i need to make some math operation with the elapsed time thanks
