Search the Community

Showing results for tags 'modbus-rtu easy master function'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Found 234 results

  1. Hello! I am working on a quote for a new project that will use EtherCAT but also requires DeviceNet for some legacy components.  Has anyone successfully used the Beckhoff EtherCAT coupler (EK1100) with the DeviceNet Master Terminal (EL6752) and an Omron PLC as the EtherCAT master? My concern is that the coupler will only communicate with the Beckhoff EtherCAT master, but since it is so much more expensive to get the new Omron parts to communicate DeviceNET i am hoping this could be an option.  The equipment is extremely simple and price is a major consideration.   Thank you!!!
  2. modbus rs232 communication error

    hi I am traying to connect 10 plc's FX3U to a scada system, on the plc's there are a rs232db and FX3U-232ADP-MB cards. i have devices transmit the rs232 by lan or any thing I need (rut955) my problem is when i download the program on plc same times the communication go right , but if i powering pls off then on the communication fail down. I initialized the plc  like photo can any one help me? sorry for my English
  3. 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
  4. Hello out there   I've searched for quite some time but unable to find any information helping me through this. I got a Omron PLC NX1P2 where im supposed to setup modbus communication over TCP/IP but so far i've only been able to find information regarding RTU setup. But seen forums mention its possible to setup via TCP/IP Anybody who can help. A program sample would be helpfull aswell. Im a trainee as automationengineer and this is my first encounter with Omron PLC and Modbus so quite new to the field.   kind regards Ivan T.
  5. Thesis idea

    Hi guys!   Actually, I am student. I need to choose a thesis topic soon. I would like to write something which is connected with automation. I wolud like to ask your help, to figuring out an idea, what can be a good topic in nowdays. It would be a master degree already. Im using AB PLC-s, so it would be convinent if someone could suggest for me what I can solve with this, enviroment (rs logix 5000, studio 5000) Im not asking a solved thing. I would like to ask some ideas or tip. If anyone have some idea, pls share it thanks.  Thanks in advance.
  6. I am currently trying to connect my OMRON NX1P2 1040DT1 (Using CIF-105) to my Unitronics V570 PLC, With my OMRON PLC as Master. It seems as if Unitonics Rs485 only wants a six-wire connection type but my OMRON PLC wants a 2-wire or 4-wire connection, Wondering if anyone has a solution to my problem and can assist me.  
  7. Hello, I'm trying to connect a CJ1M-ETN21 as slave Modbus TCP with a Modbus/Dali Gateway. I download from Omron website some FB with ones should be possible. The FB only can be used with the direction unit 0, but we can change some directions inside the FB and can be adjusted to other units. In the download I found this FB: MTCP_ETN_Connect, MTCP_ETN_Fn01, MTCP_ETN_Fn02, MTCP_ETN_Fn03 .... Supposed with connect we can establish the connection with the master, but the FB never make nothing. Should I make some special configurations to use this FB? I appreciate any help. Thanks
  8. Indusoft Web Studio

    i am using indusoft web studio for the modbus logging. program runs successfully but after a half day or a day it shows error " error initializing the driver modbu 10.10: invalid serial port "any suggestion will be appreciated.RegardsZubair Ahmed
  9. RSLogix5000 Transfer function Bumpless transfer between two inputs. If criteria or FLAG is true, then transfer from input-1 to input-2 at a prescribed ramp rate, and then release the output to match the selected input without rate restrictions.  Issue: The issue is that upon the status of particular input (FLAG), the control valve demand jumps from 0 to whatever the output of the PID’s Low Select value is (maybe 50% or 80% or other). Request: Ideally, I would like to mimic or replicate the Transfer algorithms provided in other control systems, as described below . The TRANSFER algorithm performs a transfer between the two inputs.  The output is equal to the IN2 input if the digital input FLAG is TRUE, and the IN1 input if the digital input FLAG is FALSE.  The algorithm automatically performs a bumpless transfer between the track input and the selected input when a tracking request is removed.  The algorithm ramps to the selected input (IN1 or IN2) at the specified track ramp rate (TRR1 or TRR2).  Internal tracking may be selected to allow a bumpless transfer between IN1 and the IN2 inputs.  Individual track ramp rates may be initialized to ramp from the IN1 to the IN2 and from the IN2 to the IN1. Attached is RSLogix5000 program "transfer.acd" Thanks.
  10. Modbus with CJ1W SCU31-V1

    Hi every one, I want communication Inverter mitsubishi D700 with module CJ1W SCU31-V1,  any one give me a correct solution and send any sample program. Thanks
  11. I'm trying to communicate with INVT PLC and DGM8002(grain moisture analyzer) via mobus RTU.   Can anyone explain about these Modbus address ? Please kindly see in picture . example working mode address K0 (0-stop ,1-manual,  2-Auto) Actual Moisture Address K6 What is meaning of K0,K1,K3,K6. Is that K0= 0000 K2 = 2000. K3=3000 ? Any suggestion please. I'm really appreciated your comments.❤️  
  12. Is there a way to clear a CPU fault on power up without having to connect to software?
  13. Allen bradley Micro850

    Hello, I am new to automation and I do a project with a Micro850 Plc. I am more comfortable with logic block so I write my program in Function Block langage on Connected Component Workbench software version 12. I would like to make flashing a light but I don't know wich block to use and how to program it ... Could you help me. Thank you
  14. Hello, In past i was using Siemens S7 300 and Simatic 5.3. So a long time ago. I restart look back to plc because i need to monitor the temperature of my heating system. So bought a plc that is a IEC61131-3 standard and  OpenPCS as Develop software.  So i begin to play with OpenPCS because  Im very rusty.  SO i create a function, that i named FC_TEST . When i compile the below code i get an error E: S5004: Function blocks instances are invalid in 'FUNCTION'-POUs, STRUCTs, and in ARRAYs.  It seams that Timer block inside the function FC_TEST are not allowed, i understood right ? (*  --------- DECLARATION  ---------  *) VAR_INPUT T_1 : TIME ; (*Declare T_1 as a Time Input ==> Set the Time of Timer *) START : BOOL; (*Declare START ad BOOL Input ==> Start The Time of the TIMER *) END_VAR VAR MY_TON : TON; (*Instantiate MY_TON as Timer type TON*)  END_VAR (*  --------- FC PROGRAM  ---------  *) MY_TON(IN := START , PT := T_1 ); FC_TEST := MY_TON.Q;   (*  --------- CALL THE FC---------  *) tmp2 := FC_TEST(T#2s, I0_0);  (* I0_0 is a input*) Thanks  Marco  
  15. - i'm from VietNam, Who can help me?? - I cannot communicate the RFID card reader with the FX3U PLC using the FX3U-485ADP-MB module; - register error D8438 = 3821; D8423 = 1025; D8422 = 212. - Here is the connection picture and my PLC code thanks !!!!
  16. Q03UDVCPU Modbus Setup

    Hi Guys, I need help to set up modbus tcp/ip parameter for Q03UDVCPU, i want to use the predifined protocol and built in ethernet port. do you guys have some usefull references how to setup modbus tcp/ip, or is there any example program from mitsubishi? Thanks
  17. Dear Engineerds,   My Master (non siemens) doesn't see the Holding Registers of the Slave (S7-1200) plc. However the Q coils are fine and all Diagnostics don't show errors. The Hardware: S7-1200 – CPU 1215C CM PtP – CB1241 RS485 (6ES7 241-1CH30-1XB0) - Half Duplex RS584   Firmware: Modbus_Comm_Load (V3.1) Modbus_Slave (V4.0)   I've tried with various DB, UDTs and manipulating HR_Start_offset parameter with no success. Could you advise what am I possibly missing? Modbus_Comm_Load_DB_Snapshot.xlsx Modbus_Slave_DB_Snapshot.xlsx
  18. From DM:   Hi; my name is Metin , I live in turkey. unfortunately I have a problem that I could not reach a conclusion here. I hope you can help. I need to communicate with CJ1W-ETN21 with a device via modbus tcp and read information. I downloaded ready-made protocols on omron site, connection is established but I cannot read. I tried the attached protocols. the device I am trying to communicate with :  I will get the weight information from the weighing device. Thank you in advance for your help.
  19. Hi there, Im having issues controlling ATV 320 VSDs over Modbus RTU with a M221 plc, does anyone have any pointers for me to look at? I believe I Have set everything up correctly but when I run the program on the plc the atv's just stay in 'NST' state I have included screenshots if they are any use   My speed reference in this example is taken from the memory word %MW0 which I am inputting via a HMI   I have addressed all my ATVs accordingly in there setting with the correct Modbus parameters and selected Modbus under the FR1 configuration, am I missing anything?? Any help is appreciated as I am really struggling   Tom
  20. Hi everyone I'm new bie, I try to control VDF-M via fx1n-485-db. please help!! Thanks.
  21. Hi everyone I'm new bie, I try to control VDF-M via fx1n-485-db. please help!! Thanks.
  22. hello expert i want ask some help So i tried to communicate my Omron PLC (cj2m cpu31) with SCADA from Schneider (power logic) on my omron side the comunnication on PLC already take to communication to NB so i add communication module CJ1W-SCU41-v1 I want asking how to open the communication if i want the scada become a master and my plc become slave i got this from omron website is that program compete for my case? i need configuration for scu41 module also to communicate or if you have suggestion i really open i just need to open port RS232c from scu41 so scada can read the data from my plc  tahnkyou for your help
  23. Hi All need to convert a Decimal Value into Ascii code to send out on serial 485. eg. Weight comes in as Int 12345 i need to send it out in Ascii as 23 32 20 31 32 33 34 35. I have created an array 0 of 8 (Word) DB. Is there an easy way split the int into Digits convet in into HEX and slot the value into the various array positions? Array 0 of 8 = 23 means # Array 1 of 8 = 32 means 2 (Station ID) Array 2 of 8 = 20 means Space Array 3 of 8 = 31 means 1 Array 4 of 8  = 32 means 2 Array 5 of 8 = 33 means 3 Array 6 of 8 = 34 means 4 Array 7 of 8 = 35 means 5 Array 8 of 8 = D means CR    this sends the value of 12345 to Display ID 2 . need help to convert the decimal number in ascii. the decimal number will be max of 5 digits and less than 32000   any help will be greatly appreciated.
  24. PLC to PLC communication

    Hello everyone Does anybody knows how to estblish a communication between 2 Mitsubishi CPUS with modbus? THey are RCPU and FXCPU  
  25. CP1H Modbus issues

    From @Janaka Angampitiya: Hello, I have Three CP1H PLC with Cj1w scu31-v1. I need to send a Modbus command SCU unit through Modbus RTU compatible power meter. I use instruction TXDU and CMND but it's not working. My PLC Arrangement CP1H PLC  - CP1H-X40DT1-D    ver. 1.3 Option Board 1 mounted Cp1w-CI41   to NB HMI its work Option Board 2 Mounted CP1W-CIF12-V1 to PLC 1, PLC 2 and PLC 3 between communication Serial gateway mode it is work. CJ1W SCU31-V1  (ver.1.3) and Modbus compatible Power meter it's not working. Please help to how to connected and what is the use of instructions for this case.