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  1. I am noticing a problem where i am using MOV instruction and writing literal text into source and String datatype in destination. It works fines in one program but doesn't on another it show an error Invalid Data Type. Argument must match Parameter Data type. I know what the error is and why but my question is why is it working perfectly fine in 1 program and not on another.
  2. Dear Colleagues, I have developed a program where in i am using A-B Ethernet ActiveX Control (Asabtcp.ocx). but now i need to use the licenced version, how can i get it and where can i get it. I also installed RSLinks licences version,  Please if anyone can guide me will be helpfull. I am new to PLC so please help
  3. Hey guys, last week I posted part 1 of a series of OPC UA articles in Node-RED. That article covered some important concepts of OPC UA and how they relate to building your own server in Node-RED. I then walk through an example OPC UA Server flow and show how to successfully deploy it. https://flowforge.com/blog/2023/07/how-to-deploy-a-basic-opc-ua-server-in-node-red/ In this second article, I create a more practical example, and show how to build a custom OPC UA Server for an Allen Bradley PLC in Node-RED, including how to encrypt the server connection with SSL to make it production-ready. https://flowforge.com/blog/2023/07/how-to-build-a-secure-opc-ua-server-for-plcs-in-node-red/ I did my best to break everything down into manageable details, so that hopefully even someone with minimal experience can follow it. But ultimately building a custom OPC UA Server does take some effort. My hope is that this tutorial can teach someone enough concepts to go on and develop their own custom OPC Server applications to suit their specific use-case. As always, if you have any questions please let me know! Here to help. note - the full source code is included at the end :). Let me know if you have any questions!
  4. Hello everyone, I want to use my own computer as plc. I have a molex brand SST-PB3-PCU SST card. I will connect my I/O modules to the profibus adapter, then I will connect the adapter to the SST card. Can Codesys see this SST card and if so how do I make the connection. I can connect this type of connection in the InControl (an old software) program that I used before.  Please Help Me!! The Board I use to connect the I/Os to the computer: SST-PB3-PCU  Profibus Adapter to which I connect I/Os: 1794-APB | Allen Bradley PROFIBUS Adapter Module My I/O Modules: Allen Bradley 1794-IB16 and 1794-OB16 My OS: Win10 64 bit Codesys Version: CODESYS V3.5 SP18 Patch 3
  5. So im looking for recommendations on a safety PLC application, and I'd like some advice. So the addiction is zero motion detection, were using a 5069-L306ERMS2, 5069-IB8S, 5069-OBV8S. What id like to know if its feasible and safe. Can a zero speed detection code be written and safe in a PLC? I mean you can buy a zero speed detection safety relay, and two generic sensors , one PNP, and one NPN, and its just watching the pulses to happen in a predetermined manor and that both transition in the correct manor and that they both stop. So why or why not do this in a PLC? Any advice on how to do it, and considerations or advice?  What are peoples thoughts and or advice?
  6. I want to take data from an AllenBradley SLC 505, and send it to an Omron NX102-9000. Specifically F8: 46 from my SLC 505, which is a temperature sensor. Both PLCs are on the same Ethernet network, each with its own IP address. Have you tried it?
  7. Hello My emulator go to fault state as soon as it goes online and runs (Within a second) and the following error  Code 01, (May have been caused by an infinite loop, a complex program, or a higher priority task.) The same logic runs perfectly fine on a colleague's laptop  I'm using  RS Logix 5000 V30.00  Emulator V30.00.01 Running on Virtual Machine, Windows 7 Host system specs are:  8 GB RAM  Core i5 CPU @ 1.80GHz Socket 1 Cores 2 Logical Processor 4 Windows 10 Virtual Machine's specs:  4 GB RAM  Number of Processors: 2 Number of Cores per Processor: 2 Kindly suggest a suitable solution, what is the possible cause of this fault.    Thank You  
  8. So I'm having trouble writing a FBD within my current program for a slitting line. I need to keep a constant tension on my web as it is being recoiled onto our recoiler. I wrote a simple program using a sensor to read the growing rate of the coil to get a radius and I have feedback on my torque on the recoiler motor. The simplest math for this application without getting into anything too fancy should be Tension(lbs)= Torque(ftlbs)/coil radius. only problem is when its less than a foot then my calculation is thrown off and it actually shows tension goes up until it reaches the one foot mark then it seems to scale correctly. Do I need to scale something else? Any help on this would be appreciated.
  9. Hi all I have a project where i am building a bread softness tester.  To do this i am using a smc electric actuator and an A&D scale. The electric actuator will push down on a slice onto an A&D scale.  A micro830 plc is then reading the data from the scale and storing the real variable in an array 80values long.  I would like to display on the hmi (panelview800) the peak/maximum value in the array. I am struggling on how to do this though and have not found much information online. any help would be much appreciated Thanks in advance Trevor
  10. Hi guys, Im using RS-logix 500 Pro for configure plc AB Micrologix 1400 1766-L32B. I would like to seek some help for enabling data logging feature for this device. Im not even know how to start it. I really need some help here. Thank you.
  11. Hello I have a scenario that's been bugging me for some time now. The scenario consists of a Micrologix 1400 that I need to control it's output from modbus/tcp. In detail what I really need is to be able to manipulate the O0:0 through modbus/tcp. The PLC would be the master and I would be the slave that triggers the connection to the master. I'm using a Modbus-Client on my PC and that should be the slave. Any idea as to how I can manage that? Currently I can send data to the master but everything is "stored" on B10 and I have no idea how I could write directly on O0. Thanks a bunch guys. PS: I'm borderline noob. 
  12. I'm trying to replicate something I've done in an RSLogix5000 file without the usage of those convenient arrays.  I have 24 counters, for 24 hours in a day. I have a MapleSystems screen relaying this data in the warehouse. The logic I've tried to implement is as such If bit (HMI assigned for shift start) = 6 --------- Copy C5:78 to C5:130 with a length of ten. I'm trying to copy the 10 counters that will be displayed on the MS monitor into the part of the counters that are connected via tags. It's done like this so that if someone starts the shift at 8, it'll take from 8 + 10 hours into the same C5:130 ten registers to display it on any shift. When I copied c5:78 --> c5:130 w/ len:10 it copies the first value C5:78 into the tenth register C5:130, when I'm trying to have it copy those ten into the C5:130 starting ten, to display on the screen. What am I doing wrong here? It's as if that length of ten is acting as an indexer and if that's the case, do I have to do 10 copy lines for each hour I want to utilize this logic on? Thanks so much in advance!
  13. I've found very similar errors, but not exactly this one. Does anyone have any insight on how to remedy this? I'm using Factory talk and RSLogix5000.
  14. Hi! I'm working with a VM with rsview32, rslinx and rslogix500/5000 inside; I can comunicate with all the PLCs in the net using rslogix and rslinx (IP). When I start my RsView project, it looks all in blank, I mean like RsView can't comunicate with any PLC, however I can program/go on line/download/upload any PLC using rslogix. I saw rslinx configuration and all the PLCs are available. Any suggestion?
  15. Hey guys,   New PLC user here, and I've been tasked to control a filtering system with a PLC. I'm thinking about getting an Allen-Bradley PLC, but I don't really know what to look for when choosing a PLC. The system should have around 10 digital inputs, about 20 digital outputs, and at least one analog input. I don't quite know if I should buy a bigger PLC, or a smaller one and buy extra slots? Also, the digital inputs (sensors) are rated at 10VA. I plan on using a 24VDC power supply. My outputs are primarily comprised of solenoid valves. that are also 24vdc rated. Can anybody help me pick a particular model? Thanks in advance.