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  1. Dear Team,   We are looking for a suggestion to drive a motor which is away about 2100 Meter from its starter. The Pump is located in a pond in the forest which is 2000 Meters away from the nearest building. The pump capacity is 55kW and we are considering 55kW HD VFD as a starter. As we see the distance is much higher we are looking for you valuable suggestion about how this thing is gonna work without any abnormalities.
  2. I have just started my youtube channel The Control Philosopher wherein I will regularly post topics of interest to people in this Automation community. So far, I have posted just 4 Videos  1. Connecting PLCs to MCCs  How to safely interface PLC IOs to Motor control Centres 2. Understanding the Basics of VFDs Part-1. The Very basics 3. Understanding VFDs Part-2 Covers Load Types, Energy saving principles 4. Understanding VFDs Part-3 Covers Selection, Configuration and Harmonics
  3. Emerson (GE) memory map data types

     I've always had this Allen-Bradley memory map taped on my wall in my office. It used to be handy to use, until I remembered al of the prefix letters for each data type. Now I am using Emerson (GE) the old proficy software now called PAC ME machine edition. Now I'm finding it's about impossible to find the data type list amongst the thousands of help files, videos, ect... it seems like a simple thing to find, but I'm not having any luck. They use I and Q for regular inputs & Outputs, but there are R files, M files, S files, N files, G files, ect.... this is old-school PLC software that doesn't use tag names.   Is there a steadfast rule for each type, or can they be used for any type of data? Dazed and confused...  
  4. Problem: I am getting a control sync fault on 2 recently installed kinetix 5500 but only when my programing PC is connected to the machine network.  Install and setup all went great over a 5 day period.  Then all of a sudden I started to get this fault. Sometimes 100 times in an hour.  As soon as I go offline, and unplug my PC the problem goes away.  I have also tried another PC connected to the Machine network and still get the same result.  Sometimes machine can run for hours with my PC connected with no problem.  I do not have to be online with controller for fault to occur. Setup: I have the 2 K5500's ethernet ports daisy chained together, and then connected via shielded CAT 6 cable directly to port 2 of the Compact Logix Controller Coarse Update is set to 3.5ms and utilization's are at 33% and below.(I have tried the default 2ms with same results) Ethernet modules are configured with FW rev 7.013. Machine network is isolated.(not connected to plant network or internet) Equipment: Compact logix L33ERM Running version 30.01. There are a total of four servos in this system all running over ethernet.  2 Kinetix 350's(not affected), and 2 kinetix 5500's. I have tried: separate ethernet cables for each drive ran through a switch different ethernet cables resetting coarse update speed connecting a different PC for programming   I am just not sure where else to go with this.  Thanks in advance for any help.  
  5. Hi All, I need access to a the Safety function blocks within a safety CPU using sysmac studio on a machine we are upgrading.. Is there a generic password available to gain access? Best Regards, Paul  
  6. Dear reader, I am writing a C# program using the library  ‘EasyModbus’ that needs to communicate with Siemens WinCC via the connection type ‘Modicon modbus’ I have written a version using the ‘float’ data type in WinCC and that works perfectly. Here my code fragment: Method to convert ‘double’ to bytes in C#: public static byte[] DoubleToModbusFloat(double value) {     byte[] bytes = new byte[4];     float floatValue = (float)value;     int intValue = BitConverter.ToInt32(BitConverter.GetBytes(floatValue), 0);     bytes[0] = (byte)(intValue >> 24);     bytes[1] = (byte)(intValue >> 16);     bytes[2] = (byte)(intValue >> 8);     bytes[3] = (byte)intValue;     return bytes; } Call of the method and loading of the modbus registers in EasyModbus: Bytes = PublicCode.DoubleToModbusFloat(TmpDbl); int n = (int)ModbusStartAddress + ((i - 1) * 2); mb.ModServer.holdingRegisters[n + 1] = (short)((Bytes[0] << 8) + Bytes[1]); mb.ModServer.holdingRegisters[n + 2] = (short)((Bytes[2] << 8) + Bytes[3]); So far so good – this works fine. But I also want to be able to use the ‘Double’ data type in WinCC because I sometimes need more precision than the 7 figures of the ‘float’. I thought it would simply be a case of doubling up the code so I wrote: Method to convert ‘double’ to bytes in C#: public static byte[] DoubleToModbusDouble(double value) {     byte[] bytes = new byte[8];     long intValue = BitConverter.ToInt64(BitConverter.GetBytes(value), 0);     bytes[0] = (byte)((intValue >> 56) & 0xff);     bytes[1] = (byte)((intValue >> 48) & 0xff);     bytes[2] = (byte)((intValue >> 40) & 0xff);     bytes[3] = (byte)((intValue >> 32) & 0xff);     bytes[4] = (byte)((intValue >> 24) & 0xff);     bytes[5] = (byte)((intValue >> 16) & 0xff);     bytes[6] = (byte)((intValue >> 8) & 0xff);     bytes[7] = (byte)(intValue & 0xff);     return bytes; } Call of method and loading of the modbus registers in EasyModbus: Bytes = PublicCode.DoubleToModbusDouble(TmpDbl); int n = (int)ModbusStartAddress + ((i - 1) * 4); mb.ModServer.holdingRegisters[n + 1] = (short)((Bytes[0] << 8) + Bytes[1]); mb.ModServer.holdingRegisters[n + 2] = (short)((Bytes[2] << 8) + Bytes[3]); mb.ModServer.holdingRegisters[n + 3] = (short)((Bytes[4] << 8) + Bytes[5]); mb.ModServer.holdingRegisters[n + 4] = (short)((Bytes[6] << 8) + Bytes[7]); However, this code does not work correctly. I have tried all combinations of byte and word reversal, and whatever I do WinCC either displays nonsensical values or ‘####’ showing that it cannot display the value. I have tried reading as much documentation as I can but it still looks to me as if I am doing the right thing. Also, I have downloaded a number of ‘modbus master’ code examples, and they seem to be able to read the ‘Double’ from my program without any issues. In WinCC I also see that there are two types of double – ‘Double’ and ‘+/- Double’ – I am also unsure as to why this is – there is no ‘+/- Float’ data type, which seems inconsistent to me. I am obviously missing something, but cannot seem to discover what exactly. I hope that someone can point me in the right direction as to what I am doing wrong. Please see attached word file for a picture of the configuration of the connection in WinCC.   Thanks in advance for any help !, Dave Long Double trouble.docx
  7. Hello everyone, I'm trying to import the I/O module configuration file (extension XHW), but this option is blocked in Control Expert. I'm trying to import an existing configuration file so that I don't have to reconfigure the I/O boards manually. Does anyone know how to enable these import and export options or is there another method to import the file? Thanks 
  8. I have this hardware configuration of an extension rack for a M580 PLC projet using EcoStruxure Control Expert I export the.XHW file by following the procedure below: https://www.se.com/uk/en/faqs/FAQ000256454/ And I am trying to rename the DD1602 card using the file, however, when I rename the card as a show in the next image (selected in green), and re-change the file to the .XHW extension, when I re-import it into Control Expert, I get an error saying: unknown fatal exception, even though the only change I've made is to the name of the card. I know I can rename IODDTs instances manually in Control Expert, but in fact I'm trying to automate the process of renaming IODDTs because I have a lot of IODDTs to rename, which is why I thought of using the XHW file. Does anyone have an idea of what I could do? Thanks in advance
  9. Hi everyone, I have a question for you all, Is possible to configure CJ2M-CPU11 with tags trough network configurator to connect Control Logix PLC using EthernetIP? I did a configuration with CJ2M-CPU31 and Control Logix PLC with no problem, but now I need to communicate CJ2M-CPU11 with Control Logix PLC using EthernetIP. Some of you did this configuration between this two PLC before? Regards!
  10. Hello everyone,   I'm seeking recommendations for training programs or resources focused on building control panels. I have a basic understanding but want to enhance my skills in design, wiring, components, safety, and troubleshooting.   If you have attended any reputable hands-on training programs or know of online courses, I would greatly appreciate your suggestions. Any personal experiences or tips are also welcome.   Thank you for your assistance!   Best regards,
  11. Data register over flow

    Hi, data registers are getting full, because of extremely high speed pulsing is there any way , if the data value in register goes above the capacity of 32 bit register, it automatically attaches itself to next set of data registers so lets say if data was written in D10,D11 Upon reaching the limit, it goes to D10, D11, D12, D13 please share if there is an alternate way to do this
  12. Data register over flow

    Hi, data registers are getting full, because of extremely high speed pulsing is there any way , if the data value in register goes above the capacity of 32 bit register, it automatically attaches itself to next set of data registers so lets say if data was written in D10,D11 Upon reaching the limit, it goes to D10, D11, D12, D13 please share if there is an alternate way to do this
  13. Hi, I'm Jovel, I'm new to learning how to program PLC. Just want to learn how to use Omron Sysmac Studio . I have a question about the Data Type Data Type - Structure ( Offset Type - Offset Byte )  / Union   I Don't Understand this 2 Data types and how going to use them, can anyone teach me and have a sample program? Thank you
  14. Hi from Colorado, Panel Builders @ MRPLC~ I bought a custom 508A assembly from a UL shop (277/480v 3 phase). The prototype didn't work out very well so I'm revising the design for next time. Before I present my "red line" revisions to the fabricator, could someone advise if I'm OK to simplify part of the work in a particular way? I just need to make sure my simplification doesn't run afoul of the 508A standard. My clients requested that a ten watt 120vAC amber LED (distant from the 508A cabinet) should light up whenever the 3 phase bus is energized. The panel fabricator provided an SSR solid state relay to close whenever 277v shows up across the "input" terminals & they fused the 277v hot for the input so that's all good. The "output" terminal is "single pole normally open", rated for 10 amps. The power that I'm sending in from outside the cabinet is from a small UPS system where the inverter is rated for 250VA's--so it can't deliver more than two amps @ 120vAC.  It seems to me that I don't need the series fuse that the shop provided to protect the 10 amp rating on the SSR--since my input power is already current limited. It also seems that I don't need to bring the associated single phase neutral wire into the 508A cabinet at all--since the neutral is never switched & it's doing nothing inside the 3 ph. assembly. If I revise the drawings along these lines, I'll eliminate two terminal blocks, a cc fuse/fuse holder & some wire...and this part of the assembly will be simpler & more intuitive.  Basically, I want to treat the SSR like a switch leg for the light, running only a 120v hot wire to & from the SSR output terminals. I don't want to revise the drawings, however, unless I'm sure the fabricator won't have to change them back to comply with UL 508A. I don't own the UL "standard" document & I don't know the peculiarities...but I'm sure some of the forum members do.  Should I add signage to explain that the 120v hot must be current limited or OCPD protected before it enters the 3 phase cabinet? Thanks in advance for any coaching or suggestions.      
  15. control panel for sale

    Hi all, Hope everyone is doing well. I'm currently in the process of starting a home based control panel shop. I have about 8 years of control panel building experience and about 2-3 years of being shop team lead/design engineering. I have been planning this for years and now I have my shop full of necessary tools and material to build small/medium sized panels. I have gone through all the training and examination(which was not easy) to be able to produce UL508A approved panels. My goal is to produce a steady work load with great quality. Now I just need an opportunity with customers which I find to be the hard part. I have been contacting local industries but haven't had any luck. If anyone out there is seeking control panels built at a good competitive rate please advice.
  16. We are seeking a Control Panel builder in the SE Michigan area. We can supply the drawings, components, enclosure, etc. Typical panels include PLC, HMI, VFDs, and standard components. Please contact us if interested. We can send more details as needed. We typically need 20-30 panels in a year.
  17. Hi All, I'm new to using PLC, and my background is majorly programming. I am learning how to control a PLC over the internet using HTTP or TCP/IP. I have a Mitsubishi PLC Melsec FX-5U 32MR and my requirement is, I want to send create a setup where the PLC works more like a Client on the network and reads values from the server (which is a computer). The outputs on the PLC are controlled by the values on the database in server.  So, lets assume I have a value like this on the server "1,0,0,1,0,1", it should translate like below: Y0 = 1 Y1 = 0 Y2 = 0 Y3 = 1 Y4 = 0 Y5 = 1 Is there any guidance where I can read through and learn how to do this. I would prefer doing it by ST programming and not Ladder.
  18. Logic issue, or problem with Control Expert 14.1?   Pop-up box, followed by Control Expert crash.  PLC seems to be running fine. "Control Expert Fatal Error" "The thread tried to divide an integer value by an integer divisor of zero" Anybody seen this before?  Corrupt file?  Reboot?  Uninstall/reinstall?
  19. Hi All I am trying to connect Cognex OPC Server with Mircrosoft SQL Server (SMSS). Do you have any idea how to do that? I couldn't find relevant information online.
  20. Motion Control

    Hi Everyone.   I have been tasked with changing out an older Flex Drive servo drive to a more modern Micro Flex drive in a machine that has an Omron CQM1H-CPU51 PLC.  I'm having a few issues but hope that i can gain some clarity around at least one of the hurdles Im facing from here. Biggest issue for me at this moment is My work hasn't yet purchased a programming lead for this PLC (or even the bits required to make one myself) but i have a feeling the control for the Servo is done via motion control in the PLC.  Question here is, if changing from one servo drive to another type, will the motion control code need to be updated to work with the new servo drive?  I have very limited experience with motion control itself at this stage so I'm a bit lost when it comes to these sort of details. Regards Kiwi_man82
  21. I have an old Panelview 800 in a system that consists of the PV, a Micro 850 and 10 Powerflex VFd's running conveyor motors. My problems started when one of the motors would not run. It seemed that the PLC was not sending the Run command or the Speed. The problem got worse as I was working on it when two others did the same thing. The current situation is that 8 of the VFD's are getting a Run command and 2 are getting a flickering command. All 10 are getting a 0.0Hz speed command. I connected to the equipment with my laptop and looked at the PLC program and the PV program. I found that in the PV program that all of the user input data, which consists of Motor Speed (Hz), Accel and Decel times and some other timer values for the timing of some conveyor starts and stops, where all gone, set at '0'. this equipment is several years old and predates my presence here. The PLC program seems to be running and passing the commands that it receives to the VFD's. The data is passed to the PLC via Global Variables. I've never encountered this particular problem before. Any ideas?
  22. Can someone please suggest a Control Panel Builder that is located in Germany?   I work for a company in Australia and due to Covid 19, we are struggling to meet an onsite date for a project in Germany.   This project uses Siemens PLC gear, Danfoss drives, and mostly Schneider electrical gear. The enclosures are custom and stainless steal.    I have electrical schematics and enclosure drawings for quoting.
  23. Hi, I have a problem with Omron PLC and Beckhoff IO. The IO just disconnects in a few minutes and comes back! I received different errors: Link off error, Illegal slave disconnection, process data reception timeout. When I also check "Display Diagnosis/Statistics information" I see errors on all ports A and B of all nodes.  I have called and talked to both Beckhoff and Omron.  I have two NX1 and one NJ101 to test. And I have three EP2318-0001. I have the same problem with all the PLCs and EP boxes. It does not matter if I have one, two, or three nodes. I have tried different revisions of the EP2xxx from the XML file, different settings for the slave, different task periods, and the error still is persisting.
  24. Currently have NX PLC setup as an OPC UA server and an OPC client setup and communicating.  The issue is only tags that do not have a Data Type are showing up in the OPC client.  I have 2 separate OPC softwares connected to this plc through OPC UA and both are having same issue.  If I setup the OPC as a polling service, then all the tags show up as expected.  Does anyone know if this is a known issue with Omron and their OPC UA server, or is there something that I am doing incorrectly (possibly a setting within Omron that I am not aware of)?
  25. PWTech is a rapidly growing company specializing in wastewater treatment equipment. We are currently hiring for a Controls Engineer. This is a full time position with some travel required. Requirements: 3-5 years experience Proficient with Allen Bradley MicroLogix, CompactLogix PLCs, PanelView HMIs Proficient with ladder logic programming Proficient with basic electrical theory, control systems and electronics Familiarity with NEC, with special focus and understanding of articles 409, 430 A high level of proficiency in written/spoken English Familiarity with Unitronics PLC/HMI is desired but not required Duties will include: Producing control panel submittal and as-built layout drawings, components lists, and line diagrams Selection and integration of sensors, motors, control systems and other mechanical and electrical equipment. Coordination with internal and external project engineers to resolve electrical and control questions and issues Programming, modifying and troubleshooting Allen Bradley and Unitronics PLCs and HMIs Providing assistance and remote support to field personnel Maintaining inventory of long lead items for warranty and project purposes. Location: Rosedale, MD (outside Baltimore) Technologies: 50% Allen Bradley 50% Unitronics. Salary: 95k-105 depending on experience. Higher if you have >10 yrs experience. Contact: Kreal@pwtech.us