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Showing results for tags 'ladder programming'.
Found 146 results
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Hi all, I have a program I am editing in ladder mode It is getting quite large, nearly 30k steps now At some point after a continuous paste (I think) the editing has become glitchy If you try and change an item it inserts the new one and keeps the old one It puts in horizontal and vertical lines seemingly randomly which you have to play around to delete before conversion It is only this one program I tried editing on 2 pc's, no different I cant find anything in mitsubishi manual Has anyone else had same issue? Thanks in advance
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Greetings Can someone tell me about a memory that saves the data even when the machine is turn off? I need one for a speed pulse for a driver and all the memorys that I used where not saving the data. The PLC is an FX3S-MT32
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Hi all, I'm working on my migration from CJ series to Sysmac (NJ/NX). I've encountered something I think is a simple answer but I just can't find anything in the documentation or forums that has gave me a concrete answer. I want to increment a variable by one. Is it not possible to insert a raw integer into the value field of the function? (Please ignore the P_Off as this is only for test purposes only) I know I can create a variable and make it a constant of one but that just seems odd to have to go through that many steps to do so. EDIT: I should add the variable I'm trying to increment is a UINT (Unsigned Integer) The error I get is: EDIT2: While I solved my problem with this instance by using the Increment function, my root question still remains. How do you supply a value of a number to a parameter of a function without creating a symbol for that parameter? Thank you all for your time,
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how to program a thumb wheel switch with delta plc using isp sowftware
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I'm working with Emerson 90-30 on proficy machine edition and I'm trying to use a string variable to display words on a graphical panel in target 2 but withing the code itself on target one I cant seem to understand how the reference address works? can some one explain how string variables function and how to use them?
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Hello my brother and sister at this forum, please help me, my problem is after i make ladder diagram and iam click button simulation -> Work online simulator ( CTRL + SHIFT + W ) then appear warning "failed to start ladder engine", what a problem?? thanks before
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TIA Portal PLC Programming Made Easy - Keyboard Shortcuts
HansRockSolid posted a topic in Mitsubishi
Hi!Are you tired of skimming through menu bar items in TIA Portal in order to finally find that one command that you were looking for?So was I!So I´ve composed a handy one-page list of keyboard shortcuts to execute those commands in no time (FACT - 99% of them are executed using your left pinky and your left/right index finger ). Check out the list of keyboards shortcuts in the PDF attached below.For more practical tips and tricks on TIA Portal PLC programming -> go and have a look at my video course by clicking on the link below:https://lnkd.in/eipFaGm Keyboard Shortcuts.pdf -
Most Important Scripting Language For Controls Engineers
OmronOmicron posted a topic in General Topics - The Lounge
As the industry of plc and scada softwares continue to integrate more and more programming languages into their IDE, what is the most common language that should be learned by controls engineers (excluding Ladder Logic)? I mainly use Python and VB for scripting but I am curious what languages other SCADA and PLC programming environments use. Should I be sticking to a specific language and learning it well or just know a little bit of them all? Let me know your thoughts!! -
Hi New here. Trying to create a cumulative timer with zelio soft 2 for a SR2B201BD So, whenever the plc receives a pulse (coming from a coin acceptor) it adds x amount of time, whenever receives a second pulse, adds x amount of time to the time left on the timer. This is a timer for a self serve car wash. Used to work with Ecostruxture Machine and a TM221, but do to a stock break on the supplier and time sensitive project was forced to change to a sr2. Can't seem to make the transformation from my program on ecostruxtur to the zelio. Any help? Thank you
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We have an older Nematron system we are working on and requires some software. The system uses DOS 6.22 and launches Screen Ware 2 software and the Reliance DCS V1.01 to talk to the Rockwell AutoMax PLC that uses the Programming Executive Version 4.2. We have the Nematron parallel port keys (dongle) needed and are looking for installation media for editing. We also need information on the executables that open the screen files the ULTRA MAIN MENU is not available to us. We are interested in viewing the config for upgrade so even software that is newer and capable of converting and reading the program is fine. Any help is appreciated!!
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I am trying to use Reusable files, but it is greyed out. Is there a setting that needs to be enabled to activate it? I am using CX-Programmer v 9.74 Update 1: Apparently, when you create a data structure this gets greyed out
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Question About PLC Programming for a Concrete Batch Plant
domster2003 posted a topic in Automation Direct
Hello all, I am working on a batch computer for a concrete mixer, and the computer that was running the plant before has stopped functioning. It was an old PC running MS DOS. The code is encrypted and replacing it is not a cost effective option. I therefore am looking into using a PLC to control this batch plant. I have a setup that was in progress by another employee who no longer works for us, it is a CLICK PLC from Automation Direct, and it is supposed to be paired with a EA9 T8CL touch screen HMI from the same company. I would like some advice on just some basics, I would greatly appreciate some input. I essentially only have one input, and that is an analog scale, 0-20mA input. I have digital outputs for sand, gravel, cement powder, and a water meter for adding water to the mixture. I have one final output, an additive for reducing the required water in the concrete. What I would like to create is a program that when it is told to start, looks at the scale, and if the scale is less than say 100 pounds, opens sand until it hits 1700 pounds (as an example), then turns it off. Then it turns on the gravel and adds that for another 1700 (again for example, all these are variable), turning the gravel off after. Next the cement, and so on. I don’t need someone to write the program for me, but can someone point me in the right direction on using an analog input to turn digital outputs on and off? Again, your help would be greatly appreciated. Thanks for taking the time to read this long post. -
Array A INT[32] Array Index B INT Destination C INT I am trying to move an Array (A) Element (A[2]) using a symbol (B) in ladder into a destination symbol (C) C = A [ B ] Result: ERROR: Array Index of Operand 1 out of range at rung 1 ( 6, 0 ). The documentation suggests that it is possible, but I am unsure if there is something I am doing incorrectly. Note* Fixed indexing works with no errors Is there another method to accomplish this? PLC : CJ2M CPU31 CX- Programmer: Verion 9.74 Update 1: If I go online to the PLC It does look like the array look up is working. Is the issue with the mov block? Update 2: I changed the memory locations which has caused a different error to appear. This error is clearer but does not explain the manual excerpt I posted further up ERROR: Only the constant can be specified for the index of the array. at rung 5 ( 6, 0 ). Update 3: Solution 1 I managed to hack together a proof of concept using pointers and indirect offsets Update 4: Solution 2 For some strange reason things work as expected inside of the function blocks so I made one where the array is In-Out and with an input and output respectively. Note* External reference to pointers inside of the function block produced an error. Function block Logic Update 5: Solution 3 Now I feel like I am going crazy, I tried just the original code again and it works... I have no idea why and if it was not for all the documentation I would be lost as to why it works now... Update 6: Conclusion It seems to have array indexing work the array index must exist in the D Memory Block. The reason it did not work above is because I somehow had a MOVR block when I tested after moving all the variables to the D Memory Block. I hope this journey helps someone else :)
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Hi everyone< i need some help with CX programmer i have written a programm as when i enter the Set value on HMI in D892 and press enter the Input 1100.01 energises and this executes Substract block (415) which sbstracts #6 fron D892 and saves it in D896. Them Comparison b;ock (300) compares D896 with #0 and as soon as D896 is equals to 0 the ouput flag W11.01 energises Now as u can see in the image below the value in D896 in substraction block and Comparison block are different and this is causing the output to energise at wron count . Why is there a difference In the D896 value??
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Newbie in the field of Automation here! I have a waste water project that requires operating 6 pumps to empty a sump. The water level in the sump is being monitored by an analog ultrasonic sensor. The analog range is divided into 5 levels; level 1 being the lowest and level 5 being the highest. The way the pumps operate is analogous to the water level, i.e., 5 pumps will run at level 5, 4 pumps will run at level 4, 3 at level 3, 2 at level 2, and only 1 pump will run at level 1. The sixth pump is used to run the pumps sequentially and that's where I need help. Basically, the pumps can not be assigned to a certain water level as this would result in the pumps at the lower level run way more as compared to the pumps assigned to higher levels. The pumps need to alternate so as to keep the running hours of each comparable. Another requirement is that say if pump 1 turns on due to water level rise and then turns off due to water level fall, and again if the water level rises, then the next pump should start instead of pump 1, and so on for the rest of the pumps. Also, if one pump goes on some kind of fault, the 6th pump comes in and runs in its stead until the fault is reset. I'm trying to come up with a ladder program to make all this happen but hoped that I could find some help online. I feel like this is a common project and there should be someone that can give me the proper solution. With thanks, Aafaq.
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Hello to everyone. Nice to meet you all. How are you? I hope you are doing well. I’m developing a program with the purpose of make something similar to a pulse train in the output. However, sometimes I need the output to be a “positive” pulse and sometimes a “negative” one. By positive and negative I mean the polarity in relation to the pulse train source. I’m trying to use a pair of bits in order to switch between the two choices of polarities. I attach a simplified version of the ladder diagram I’ve made. When I thought about the logic, it seemed logical to me, however, it isn’t working as supposed. SM0.4 is a pulse train source. According to the software manual, it is a pulse train with 50% duty cycle and a cycle time of 2 s. That it to say it says at TRUE for one second and return to FALSE for another second. I assign the value of that variable bit to the M0.0 memory bit. I get the negative version of the pulse train logically negating it in the Network #2. I assign the value of two inputs, I0.0 and I0.1, to other two memory bits, M0.1 and M0.2. · When both inputs are in a FALSE state, the output stays FALSE, disregarding the state of SM0.4. (Case #1) · When I0.0 is TRUE, M0.1 is TRUE. However, Q0.0 stays at FALSE no matter SM0.4 is TRUE or FALSE. I attach a pair of pictures. (Case #2) · On the other side, when I0.1 is TRUE, M0.2 is TRUE. In this case, the output shows the correct behavior. It is the negated version of the pulse train source. (Case #3) Has any of you experienced something similar? Is there a better way to execute my purpose? I’m not executing the program, just simulating it with KincoBuilder from Kinco. However, it has always worked fine for me. Thanks for you attention. I look forward for your responses. Kind regards!
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Hello Dear Engineers; I am a PLC beginner learner, so please do not my my question as it sounds little ignorance my question is; how can i insert two output instructions in parallel but from the same input instructions. kindly check the drawing attached, the problem i can not find the right tool in my RSLogix 500 software. please help me and i do highly appreciate that. best regards, Kevin
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Hello all, There are two pressure gauges in a line with a flow of water. The flow is controlled by the pumps which is controlled by the PID whose control variable is pressure gague -2 . In ideal condition the pressure gauge -2 remains at 55 psi and pressure gauge -1 stays at 82 PSI. But in the line if someone opens a manual valve then pressure gauge - 1 reads 100 psi because the pump is running as per pressure gauge 2 . Is is possible to clamp the PID so that pressure gauge 1 remains at 82 psi. FYI: Pressure gauge 1 is right after the pumps and pressure gauge 2 is at the end of the line.
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hello everyone, I using stepper 17HS2408, microstep driver, modul motion QD75D2, PLC QD3UDV,, i've been trying to use program Absolute in axis 2. When I trigger the command to run absolute program the current value is running but the stepper motor still not moving, is there any suggestion about this?
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Hey, (Programming a M224 with Machine Expert Basic) I'd like to get some input from you guys about a logical task: I have 8 contactors controlled by my PLC outputs, they heat a water boiler. throughout my operation, I require a different amount of heaters (I could move between 1-8 heaters in a single operation) I would like to scramble what contactors I put in use every time I start an operation, in order to not constantly use the same heating elements and wear specific ones out. For example, in the first stage of heating I will use contactor #1, next time I start the operation I would like to use contactor #2 and so on.. How would you approach this problem? SBR? Timers? Thanks
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Hello everyone, may you all bless with the best. Can anyone please help me on connecting and programming In Modbus rtu INVT CHF-100A vfd with FX2n having rs485-bd module. I want to connect 11 vfd and one fx2n plc also .
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Hello everyone, may you all bless with the best. Can anyone please help me on connecting and programming In Modbus rtu INVT CHF-100A vfd with FX2n having rs485-bd module. I want to connect 11 vfd and one fx2n plc also
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Hi, Could anyone help me out on how to extract the digits present in a string in sysmac studio... Thanks in advance !!!
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Hello, GX Works 3 / R04CPU. I'm using the Device Memory so that I can link the HMI to my PLC. I've set aside some memory, in this case D3260, to be used as a Real (32 bits data, Float single precision) to be set by the HMI (operator adjustable setting) and read from the PLC. I thought I'd move D3260 into a local label for readability/testing purposes, and it says I cannot move an Int into a Real - which is fair enough, but, how/where do I set D3260 as a real? Do I use some Functions to take D3260 + D3261 and make it to a real, or define the data area as a real somewhere... Dumb question I know, I'm new to GX Works 3. Thanks very muchly
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According to picture 1, ''Piston A moves to the right. After the set time, K = 4, the normally closed timer T450 contacts open and the normally open timer T450 contacts close.'' But according to picture 2 After the power flow from Left power rail to right power rail, it should directly go to 2nd rung and cause the normally open timer T450 contacts to close only right? but why it will go back 1st rung and cause the normally closed timer T450 contacts to open? Anybody can help explain me regarding this. Thank You in advance
