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Showing results for tags 'plc 5 output force ladder'.
Found 116 results
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My Powerflex 525 VFD “Output Frequency” starts to drop out (20, 19, 18, 17, 16, 15, 14, 14, 0, 13, 0, 12, 11, 10, 0, 9, etc.) when the Command Frequency approaches and falls below approx. 14HZ. The “Command Frequency” however does hold steady and does not drop out (20, 19, 18, 17, 16, 15 14, 13, 12, 11, 10, 9, etc.). The Pulse In Scale is set to 64. I'm using the Pulse Train Input, and as a test started the frequency of the Pulse Train Input at a frequency such that the Command Frequency started at 20HZ, and then slowly adjusted the frequency of the Pulse Train Input down such that the Command Frequency decreased down towards 0Hz. I did notice that this apparent drop out point is exactly one tenth of the Max Hz value. So for example, with Max Hz set to 140, the dropout starts to occur at approx. 14 (140 x 0.1 = 14). This apparent one tenth drop out point held true for other Max Hz values we tried, including: Max Hz set at 60 started dropping out at 6 Max Hz set at 100 started dropping out at 10 Max Hz set at 140 started dropping out at 14 Max Hz set at 180 started dropping out at 18 Max Hz set at 190 started dropping out at 19 Max Hz set at 200 started dropping out at 20 Max Hz set at 250 started dropping out at 25 Max Hz set at 400 started dropping out at 40
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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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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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Hi, New to the forum and pretty new to PLC programming. I took the 3-day Sysmac training a couple months ago, but just recently set up one of the NX1P2 units that we'll eventually use for a robotics application. Right now I've got it set up just to experiment with, so I have 3 physical switches (1 momentary, the other 2 toggle) and 4 indicator lights hooked up. Ladder program is set up to light up different LED's when the momentary contact switch I_SW1 is pressed, based on the position of the other 2 switches. Here's the issue: When both of the toggle switches are ON (see lines 4 thru 8), all of the LED's light up as expected as soon as the momentary switch I_SW1 is pressed. However, if either or both of the toggle switches are OFF (see lines 0 thru 3), even though it seems like the logic is correct, nothing happens on the output. Lines 0&1 were modified as shown to see if using the variable O_Light1 instead of going directly to O_L1 output would work, but it didn't make any difference. See attached images for example of working and not working ladder sections as the momentary switch is pressed. In the "working" image, both the toggle switches are on. In the "not working" image, both toggle switches are off. PLC's input & output indicator lights match what Sysmac is showing in the monitor screen, so I'm pretty sure it's in the ladder logic and not the physical wiring. Thanks for any advice.
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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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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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Hi I have servo motor controlled by smartstep 2 and controlled by PLC with pulse output. Origin search I have set as below Sometimes I have problem with correct home position. Normally when original Input signals become ON drive slows and after 1 cm I have home position due to slowning ramp, but somtimes drive stops immediately on the edge of original input sensor. I have no idea why it is like that. Maybe you can advise sth or get some clue thanks in advance for any help
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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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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 One of my friend want use more analog output on his vfd. Its a Mitsubishi FR-A740 type. Currently the AM signal is for current, but he needs the speed and frequency too. As we saw its only one analog output is avaiable, but you guys might know better. Can someone confims our theory. Thank you.
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Micrologix 1400 1766-L32BWA-"Burnt" Output
robmx57 posted a topic in Allen Bradley / Rockwell Automation
Hello, I am trying to flash an indicator light (Banner K70LBGYRPQ ) every .5 seconds. The PLC manual says 2.5A per channel. The light uses roughly 113mA max current @ 24vdc. I am using output 0 to do this (O:0/0). I think I may have ruined the output by flashing the indicator light. Has anyone ever experienced this before? Is there a minimum pulse time for this PLC? What do people normally do when wanting to flash an indicator light such as this? This is not the first time I have seen this happen. Thanks in advance! -
Hi,I want to read transducer signal on PLC.I am using 7kg60008ab/nn transducer and it's analog (4-20mA) output is connected with analog meter.Can I connect the transducer current output (4-20mA) signal to PLC analog input in series with analog meter display???So that I can read the value on PLC simultaneously with analog meter?
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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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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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how many (maximum) analog inputs/outputs can CPU 1215C can reach without any issue?
Jairus posted a topic in Siemens
Hello guys, how many (maximum) analog inputs/outputs can CPU 1215C can reach without any issue? I try to search in google but can't find convincing answer. Thanks for your help. -
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
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NX1P2 Motion Control change output device with code
BrunoRamos posted a topic in NJ Series / Sysmac Studio
Hi everyone, To explain the problem a little bit: I have 2 systems that are equal, they have 1 PLC, 1 Inverter and 1 Servo Axis (Image01). The devices are connected via EtherCat. The thing here is tht in these systems the PLC and Servo Axis is the same but the inverter is different. My goal is to have the same project on both systems and depending on the inverter detected use the correct program. What worked: If I add the 2 Inverters and 2 Servo Axis on the project on different nodes (Image02), I can detect which is present using the variable _EC_EntrySlavTb[n]. My issue is that if I want to make more replicas of the systems using different inverters I will eventually hit the Axis Number limit for the PLC while in reality I am only using on Servo Axis at a time. What I wanted: I would like to be able to control 1 Servo Axis with 2 different inverters (only one active per PLC) (Image03). What I tried: The axis parameters can be set using a variable of the type _sAXIS_PARAM, however it seems that the option to change the axis basic settings is not available (Manual: NJ/NX-series Motion Control Instructions Reference Manual (W508) page 5-58) (Image04). The axis basic settings is where the definition of the output device plus control words are set (Image05). Is there a work around to solve this issue? I would really like to avoid having to manually change the output device for the Servo Axis every time I make an update on all the systems. Best Regards, BR -
Hi All, Please see attached screenshot: Whenever I want to save the ladder program or start simulation, this window pops-up. If I press 'yes' I loose the whole work. I tried to open existing program and modify it, but it did the same. When I clicked 'yes' I lost all modification and just the original program remained. (I made the program in the morning, opened and saved many times but it started popping this window later.) I work with FXCPU series, FX3U/FX3UC type, simple project in ladder. This worked well but now is not anymore. I use Melsoft GX Simulator! Can anyone advise why this is happening? It is very annoying! It is pointless to work on anything now! Many thanks
