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  1. Hi, I have just purchased a FX-ENET-P502 for my FX3GE and need a little assistance to get started. I have trawled the WWW to find configuration, connection details, message structure or any other tutorials and clues. I would be grateful for direction to any material to help get started. Thank you
  2. CJ2M Modbus communication

    Hello everyone, in my project I have to connect CJ2M-CPU34 with CJ1W-SCU31-V1 module to external device (see technical specifications in attachment). The CJ2M should read and write a few values from the external device. Unfortunately, I dont have a chance to try this communication before, just during system start. I never make any project on Modbus. Anyone can send me a program to communicate with this device, according to documentation in attachment?   38RBS_Modbus_1.pdf Modbus_2.pdf
  3. Simon was a game that I remember well when I was younger. This simple game can teach us how to program sequencers and look for inputs in a correct order. I believe that this can be a great leaning problem for PLC’s and HMI’s. You can learn about bit manipulation and sequencers in the PLC. HMI timing and control is also shown because of the time to play sounds and update to the next random set of lights.   Here is part of the post …   Building a PLC Program That You Can Be Proud Of – Part 5   Simon is a memory game introduced in 1978. It has four coloured buttons, each producing a particular tone when it is pressed or activated by the device. A round in the game consists of the device lighting up one or more buttons in a random order, after which the player must reproduce that order by pressing the buttons. As the game progresses, the number of buttons to be pressed increases. If the wrong button is hit the current game is over. Our game will have a high level score and a current level score.   We will be using AdvancedHMI to communicate Modbus TCP to the Automation Direct Do-More Designer Software Simulator.   YouTube Video of the game being played:   Note: The PLC and HMI programs are provided free of charge and are an excellent way to learn PLC / HMI programming.   Here is a quick review of the programming series so far. If you are new to the site, we recommend reviewing the other parts in the series first. In part 1 we looked at writing PLC programs to control a traffic light using discrete bits and then using timed sequencing using indirect addressing. Part 2 used indirect addressing for inputs as well as output to control the sequence of pneumatic (air) cylinders in the program. Part 3 and 4 we returned to the traffic light application and expand our program significantly. We looked at the sequence of operation using Input, output and mask tables.   The first thing that we will do is look at the HMI programming. Please refer to the following post for information on setting up and using AdvancedHMI software. Create a PLC with HMI Training and Learning Environment Free Read the rest of the post…. Happy Holidays,   Garry  
  4. View File Modbus Master/Client for HMI/SCADA  Overview: The Modbus Master or Client provides an easy and reliable way to connect Modbus Ethernet or serial Protocol Compliant devices with applications, including HMI, SCADA, Historian, MES, ERP and countless custom applications. This driver supports all Schneider Electric (modicon) PLC’s and all other devices which use Modbus as a protocol. Open to support future models for this series of PLCs. Features Modbus/TCP Client or serial Master for communication with Modbus Slaves (Via standard PC serial ports, USB adapters; RTU and ASCII encapsulation in TCP/IP as well as Modbus TCP) Supports all Schneider Electric (Modicon) PLC’s or any other device which use any flavor of Modbus. Supports DANIELS/ENRON Modbus extensions. Can read up to 128 Words of Input / Holding registers or 2000 Bits of Discrete Coils / Input coils in one transaction. Performance –500mhz Pentium–10 words: 15msecs–100 words: 35msecs (avg) Full implementation of Class 0 and Class 1 Modbus functions as well as a subset of the most commonly used Class 2 functions This driver can be conviniently used with Visual Studio in development of complete large scale complex HMI/SCADA Systems. It can be used to perform advanced reporting MES, analytics, IoT, Big data type apps. One example is available to download here For More Info Overview of Parijat Drivers: Click here  Additional supporting Info about Parijat Drivers: Click here Complete Related Driver options: Click here     Submitter Scadadoctor Submitted 03/10/16 Category Other PLC Demo Software
  5. You can buy books programming Modbus TCP / IP with C# language on Google's Play Store Link:
  6. I'm designing a PLC system in which a Micrologix 1400 talks Modbus TCP/IP with three Modbus TCP-capable SCR controllers. I've never done Ethernet/Modbus TCP communication using the 1400, so I'm asking the following questions: 1. Can I connect the 1400 PLC and the three devices to an Ethernet switch and configure Modbus TCP communication from the devices to the PLC (data collection only) ? The switch will also be connected to the customer's DCS, receiving the data from the PLC and the three devices. 2. Can I connect the Ethernet port on the1400 PLC to the Ethernet switch directly, or do I need some kind of Ethernet interface, like the 1761-NET-ENI ? 3. The system also includes an HMI, connected to the 1400 PLC by RS-232 communication. Any issues with communicating with the HMI and doing Modbus at the same time? Your help in this matter would be highly appreciated. Thanks. Ron
  7. Modbus RTU

    Hi, I have LJ71C24 modbus module as a master and slave device with the RS-485 Half-Duplex (Modbus RTU). If someone could tell me what is the correct wiring and what are the correct parameters for such communication (Transmission control, do I use echo back parameter..???). Right now, I short-wired SDA-RDA (with A of slave) and SDB-RDB (with B of slave). Also, I am trying with the predefined protocol using Schneider Modbus protocol. Is this ok? Best regards
  8. Developed new software Modbus_TCP_communication. I. Modbus_TCP_Communication 1. Program Modbus_TCP_communication designed to exchange information between your Android smartphone and controllers PLC with Modbus/TCP. Information is exchanged through the computer and the router, wherein the router is connected via Wi-Fi network with your smartphone, and computer connected via interface Modbus/TCP with an PLC controller. The software has the following modes :  - modes read/write of words holding register (FC06);  - modes read/write of words input register(FC04);  - modes read/write bits coil(FC05);  - read the contents of the directory computer;  - reading contents of a text file of computer   etc. The program Modbus_TCP_Communication consists of 2 parts: - Modbus_TCP_Connection.apk - is implemented on the smartphone -   setting and monitoring of parameters and variables on the smartphone for   information from the controller; - Server_Send_Receive.exe - implemented the computer - server computer for sharing   information with a smartphone and a PLC controller according to the protocol   Modbus/TCP, computer is  Master for exchange of information,   a controller PLC is Slave 2. IMPORTANT !!!  The smartphone communicates with the router via Wi-Fi network. Wi-Fi router can be connected  to local or WAN networks. Obviously, the router must be properly configured  by the system administrator. It is also obvious that the device and the router must belong to  the same Wi-Fi network.   3. Work application Server_Send_Receive.exe tested on computers    running the operating systems Windows XP and Windows 7.    Work application Modbus_TCP_Connection.apk tested on Samsung and Philips smartphone    running the operating system Android 5.0, Android 6.0. It is better to use a smartphone    with a diagonal of 5 inches and above. There are examples of this program for the  control system of cold rolling of tubes mills is implemented in India and Ukraine, where the applied controller  PLC is MP2300S (Yaskawa). 4. App Modbus_TCP _Communication - paid, the cost per user is$ 5 USA.    Distributed through Google Play.    App Modbus_TCP_Connection.apk must be installed in the internal memory of the smartphone -    not in SD card !!! 5 Modbus_TCP_communication has a detailed guide in Russian and English languages.   The address to download the full description -   Read the description for purchasing the app !!!   Address to download Server_Send_Receive.exe formed   on the screen Modbus_TCP_Connection.apk;   IMPORTANT !!!: on your computer must be installed the driver for Modbus/TCP, designed   company OMRON. Link to download it is formed on the screen Modbus_TCP_Connection.apk, when   entering the program !!! Log on to this website (for download driver)  can only registered users OMRON.   The path for downloading on the website OMRON - Sofware Downloads - CX-Supervisor - Modbus TCP driver.      Enjoj.   Copyright Dr.-eng. Alexandr Ryss. Moscow. 2016.      
  9. Hi all, I am trying to control and/or read values from Schneider Altivar12 VFDs. Via Modbus on a AB Micro850 PLC (using the Connected Components Workbench Software). There seems to be two ways to do this with the Micro850, either with messaging (using the msg_modbus instruction function block) or with the Modbus mapping feature. I have a list of the communication parameters (see attached fileATV12_Communication_parameters_BBV51917_1.4IE05b.xls ATV32 Communication parameters_a1.2ie03.xls) But I haven't had any experience with Modbus and I am not having any success. There is not very much documentation about how to do this, If anyone can help me who has done this or knows how to do it I would appreciate it.  
  10. Hello everyone! I need your help.  I use the PLC: Q06UDEHCPU and the module: QJ71MB91. I programmed in the program GX Works 2 I instaled a library of "QJMB91ModbusSerial_V120 (FB - QJMB91ModbusSerialMaster)" and using it wrote temperature sensor interrogation program. The sensor is interrogated by the channel 2 and has the following switch settings:  Switch 1 - 0000; Switch 2 - 0000; Switch 3 - 0000; Switch 4 - 0A04; Switch 5 - 0000; which are specified by the PLC parameter in GX Works 2. I found an example of writing a program to install the switch settings in the user manual QJ71MB91 using ZP.UINIT instructions. I wrote a program to this exemple. Not prescribed bit address, which should be established when the program is executed (M0) (ZP.UINIT  "U4"  D0  M0). I wrote: ZP.UINIT  "U4"  D0  .  After executing ZP.UINIT instruction PLC stops working, blinking error, settings module is not install. How can I write a program to configure the Switch Setting?
  11. Serial/Modbus communication

    Greetings, I have L02CPU and LJ71C24 (for serial comm) and they act as a master. For slave I have some energy analyzer device. Device has a Half-duplex RS-485 serial interface (Modbus RTU protocol). Master only needs to read some data from slave. My question is: What protocol should I use for mentioned communication (MC, Predefined, Nonprocedural, Bidirectional)? I saw that if I use Predefined protocol I can select in Predefined Protocol Library, under the Manufacturer, Schneider Electric - MODBUS - 03: RD holding Registers. Is this OK for my type of communication? I will try to do some testing between LJ71C24 and QJ71MB91 (who will act as a slave), this or next week, but it would be helpful if someone can tell me correct protocol for my type of communication? P.s. I am using GX Works 2. Best regards, Luka
  12. Dear All, At the moment, I have project with PLC Delta and HMI Proface. I design HMI GP2500 by GP-PRO/PBIII ( V7.0). I see in List Device PLC of Software  not support PLC Delta.  Can you tell me how do you connect or Software HMI Proface ( Gp2500) support PLC Delta ? Thanks you very much.
  13. CJ1M+ETN21 Modbus TCP

    Hello. I'm trying to use Omron ETN21 as master for ModbusTCP protocol. I can communicate with 1 SLAVE UNIT (standard modbusTCP slave) using FB  from It works perfectly. But I have three SLAVE UNITS to communicate to. I'm trying to do this using [524] sample. I have copied SECTION1 to SECTION2 and changed IP number and SOCKET number. But this doesn't work. I would realy appriciate a working sample where OMRON PLC is MASTER for THREE (or more) SLAVES. I'm attaching code file... Thanks. Best regards, Andrej. Modbus_TCP_FB.cxp Modbus_TCP_FB.opt
  14. Would any one help me on how to configure the Modbus plus proxy TCSEGDB23F4FA in transparent mode in order to read M340 PLC registers  to SCADA , via the Modbus plus proxy TCSEGDB23F4FA? I have set up the proxy to communicate with the M340 PLC and gave a Modbus plus node address to communicate to Modbus plus network but the Adroit SCADA device driver still not healthy in order to display the registers status on SCADA. M340 MB+ Proxy Module.pdf
  15. Here is a post that we recently completed on the Automation Direct USB to RS485 Adapter.  The USB-485M is a 2-wire USB to RS-485 serial communication adapter for RS485 use. It does not require an external power supply or complicated configuration. It has a Type A (plug) USB connector for the computer side and a universal female RJ45/RJ12 modular connector. This will accept RJ12 and RJ45 plugs.  The USB-485M supports multiple baud rates and is USB V2.0 Compliant. Read the rest of the post... YouTube Video on the installation and communication to a Solo Process Temperature Controller via Modbus RTU. Let me know what you think, Garry  
  16. Dear colleagues, is it possible to operate two working Modbus units on one PLC (FX3u)? For example, one as serial Master with FX3U-485ADP-MB and another TCP Server with FX3u-ENET-p502?    
  17. Dear Forum, I am working at a Gas Processing Plant which is running Emerson Delta Distributed Control System (DCS). The Control System is communicating with over 24 3rd party Packages in the field over Modbus TCP/IP using its VIM Module. We have implemented redundant communication with most of the packages so we have a primary switch and a secondary switch. We are facing a communication issue regarding an Over Head Compressor (using Rockwell Allen Bradley PLC) and Instrument Air Compressor by CAPS Australia running XE Controller (Dedicated Controller). The issue is that when the Over Head Compressor is plugged into the VIM Network (Network in which all 24 3rd Party Packages are plugged), the Instrument Air Compressor **stops communicating**. We can't even ping the compressor. At times the Instrument Air Compressor does reply but with TTL of over 30ms. When OVHD Compressor is plugged out, Instrument Air Compressor resumes communication. I have attached wire shark capture of the network with and without over head compressor. When the OVHD Compressor is plugged in, the capture shows heavy traffic being generated by its PLC (IP address Another physical observation is that before the OVHD Compressor is plugged in the VIM Network, the NTRON Switch (Ethernet Switch) in OVHD Compressor panel shows static lights, unlike lights of a normal healthy network. When the OVHD Compressor is plugged into the VIM Network, all the lights of switches in VIM Network which were blinking previously also become static. Do the static lights mean that the network is being choked due to heavy traffic? Below are links for the Capture, IP Scheme and Architecture of Over Head Compressor. Please also note that OVHD Compressor is using following IPs  PLC (Internal PLC IP)  PLC (Internal PLC IP)  HMI (Internal PLC IP)  RedLion device for DCS Communication I would really appreciate if anyone would help me trouble shoot this issue.     
  18. The following is a post that was recently done. I thought that I would share... We will program a sequencer controlling seven cylinders that can be taught. The cylinders can be operator programmed from the AdvancedHMI screen. You will be able to select what cylinders to activate at each step and program in 500 steps. Our PLC will be the Do-More from Automation Direct. We will be using AdvancedHMI to communicate Modbus TCP to the Automation Direct Do-More Designer Software Simulator.  The following is the sequence of operation: Watch on YouTube: The following is the explaination of the code: Watch on YouTube: To see the set by set development and the code visit our website. Let me know what you think. Thank you, Garry
  19. Dear colleagues, is it possible to operate two working Modbus units on one PLC (FX3u)? For example, one as serial Master with FX3U-485ADP-MB and another TCP Server with FX3u-ENET-p502?    
  20. Deploying An AdvancedHMI Project Here is our latest post on deploying an AdvancedHMI project on the industrial floor. Here are a few thing we cover: Hardware - Fanless Computer - Monitor - USP - uninterrruptable power supply Software - Turn Off windows update - Security - Set permissions - Limit internet use - AdvancedHMI - remove ControlBox, Miximize Screen Size, Topmost property Here is part of the post... Deploying an AdvancedHMI project on the industrial floor sounds like an easy task, but there are a few things that you should consider. The HMI (Human Machine Interface) user interface will run on a computer. The industrial environment is one in which temperature, dust, electrical noise, etc. are always present. This can also be combined with workers wanting to play with the new computer. We will look briefly at the hardware and software items that will make your install more reliable and user friendly in the field. Read the rest of the post... Let me know what you think. Thank you, Garry
  21. Hello there. I have connected wireless module (master) to Vijeo Citect 7.4 using RS-485 to USB converter. My slave modules are supplied power from gird/generator and the master module is supplies from a UPS.    I'm reading Modbus registers of slaves modules data via wireless master. Every time we have a power failure from grid, I get #BAD from all slave addresses. The generator kicks off within 30 sec. That is the slaves are off for 30 sec. Even after the slaves are powered on, SCADA does not poll data from it until I restart the SCADA.    My current MODBUS parameters are:   Inittype = 3, TimeOut = 3000, WatchTime = 10, Retry = 2. Could you please assist me on which parameters to change in .ini so that SCADA reads Modbus registers of slave for more than 30 sec.   I tried increasing TimeOut to 30000 but it couldn't solve the problem. I would appreciate if some one could help me out.   Thanak you in advance.      
  22. Version 1.0.0


    This is a short bit of sample code using Socket Service function blocks to read and write data from / to a V680S RFID tag using the Modbus TCP (-ETN) version of the V680S.
  23. Here is a recent post that I would like to share. Using Visual Basic 2015 we will log three holding registers from the PLC along with time and date into a Microsoft Access Database. We will log every minute into the database with the information that we collect from the PLC via Modbus TCP (Ethernet). All code will be done and shown so you can implement this in your application with different parameters. The information collected in the database can then be distributed or analyzed in the future. Visual Basic 2015 will be used with the EasyModbusTCP client/server library for .net. We will communicate to an Automation Direct – Do-More PLC. Using the free simulation software of the PLC Designer Software, we will retrieve three values of the Modbus Holding Registers using Modbus TCP. Once we have this information out of the programmable logic controller it will be placed in a Microsoft Access (2010) Database. This will be done by using a SQL command to insert the data. Read the rest of the post... Let me know what you think, Thank you Garry
  24. Hi all,    Its the first time in this forum and need help about slc05/05 processor and modbus RS485. We need to link one slc05/05 with 5 power analysers and 3 vfd all with rs485 modbus rtu ports, as i now the slc05/05 have RS232 that suports Modbus, can we put an converter RS232 to RS485 and put slc05/05 to read write the power analyser's and vfd's. There are any sample / step by step tuturial with modbus and slc05/05 ?   Best regards, Jorge Cruz  
  25. CP1E MODBUS Maximum Slave

    Hello everyone, so I noticed in Omron's CP1E manual, there are no certain info on maximum number of Modbus Slaves that can be attached, however the PLC itself able to connect to slave number 1 - 247 I have read from common MODBUS specs, that 32 slaves are the limit for most MODBUS connections. However there are also statements that with proper design (1/8 transceivers) that we can extend number of connected slaves to 256. Anyone have experience or info about this with Omron PLC? Thanks in advance