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  1. If this has been asked and answered already, please point me in the right direction. I have a production line that uses Gefran Geflex temperature controllers on a Modbus and Machine Net communication system. The main control panel (MCP) is the master on the Modbus and communicates directly with 3 slave Geflex units (Group Leaders?) which then communicate with the others in that group via a Gefran Machine Net type interface (ribbon cable daisy chained from one unit to the next). The issue is twofold: These temperature controllers are slowly becoming harder to find AND they are a PITA to change out because they have to be put in place and then properly addressed using software on a laptop. This means more downtime waiting for someone who knows how to set these up to get there to do it say on a weekend/middle of the night type situation. (I do like my beauty sleep). I'm looking to replace these units with standard SSRs and control them with a PLC (P-2000 most likely). What I would need to be able to do is interface between the MCP and PLC in some way that the MCP still believes it is controlling 24 units (24 Modbus IDs) and have the PLC receive the reads and writes from the MCP and know which ID it was meant for in order to set the SV and respond with the PV and/or alarm codes as that ID. I hope that all makes sense. Basically I need a way for a PLC to act as if it were 24 separate Modbus slave units. Could I just use a separate HMI next to the MCP? Yes, but there are temperature dependent routines in the main operation of the line (extruder run inhibit, etc.) that requires the information reported back on the Modbus. I've looked into Modbus Gateways but the MGs I've found so far don't seem to be capable of assuming the role of 24 different slaves and interfacing with the PLC in a way that would allow the individual control.  Any ideas would be greatly appreciated.
  2. Hi every one. I have strange problem with Modbus communication in Citect 2018. I am communicating to the site switches through Modbus TCP protocol using MODNET driver and reading its sates. I am reading data from Input registers (registers addresses starts from 3x). In default, MODNET driver initializes communication trying conecting to holding register 40001 so I changed initialization in citect.ini to address 30001 because driver didn't want to establish connection because switches don't support holding registers. Now, connection to switches is working but only when page is open where I showing data from them. When I change the page, Citect loses communication and inform this showing alarm on HW alarm page. When I again open page where I show read data, communication back again. Where could be a problem? I will mention that I have more different Modbus TCP devices in project configured and with them don't have such problem. The only difference is that I am reading from holding registers and initialize parameter in citect.ini is not defined for them as for switches.
  3. Hello All, Please Help Me.. How I can to connect Omron CP1L-M + CP1W-Cif11 with Mitsubishi Inverter D700? Thank you. Omron modbus belum fix.cxp
  4. Greetings everyone, I have a TIA V16 project in which I set up 7 drives to communicate with an S7 1500 controller via RS485 using USS protocol. The drives are Simatic V20s daisychained to the bus and are properly terminated with resistors. I use the USS DRIVE CONTROL 31 function block for each drive all located in a single FC and all using the same single instance DB as recommended by Siemens. I then call this FC containing the FBs every 120ms from the MAIN OB. I then call the USS PORT SCAN 31 function in a cyclic OB set at 70ms cycle time. In each V20 i use PZD word length of 2 and a PKW of 4. Both setpoint and commands are sent through USS. What I have observed is every time take out incoming power to any one of the VFDs, the rest of them get F72 comms error and fail to communicate with the PLC. Is this behaviour normal? What causes it? I use an RS485/ 422 PtP BA module sending data at 19200bps. Strangely enough it doesn't show any fault even though the diagnostics interupt setting is enabled on it. What I noticed is that as I was setting up the VFDs one by one, the F72 fault on the BOPs only pop up on an already configured drives. So, the VFDs that hadn't been commissioned yet for RS485, but were already physicaly terminated/ connected to the PLC, didn't fault the bus when they were powered down. They only faulted the bus upon switching them off only after RS485 activation (post commissioning).
  5. Hallo, i want to connect PLC Omron CP1E to indicator weighing scale with modbusRTU connection and i have a CP1W-CIF11 module to connect indicator with CP1E. ,but I have no experience in RTU modbus communication in the PLC. How do i start?   *i just need output: 1. Coil (Reference No = 0. Output bits) for input switch with address 3 (Tare). 2.Input Status (Reference No = 1) for output lamp with address 17 (stable) 3.Input register (Reference No = 3) to read data with address 5 (gross weight) 4. holding register (Reference No = 4) to write comparison data with address 17(over) page 85 - 94 in attachment     ad4402_manual.pdf
  6. Hi guys, this is my first topic on this forum. I need an help with modbus communication through NX1P2+CIF12 and slaves inverter. I have never used this board, so i need an example to understand. Thanks
  7. 1783-NATR Modbus TCP

    Has anyone successfully used a 1783-NATR for Modbus TCP communication between a ProSoft MNET card (in the ControlLogix rack) and a Modicon Quantum? ProSoft MNET:  10.x.y.z Modicon Quantum:  192.168.1.x There is one (1) ProSoft MNET and four (4) Modicon Quantum's. NOTE:  I know there are other devices that support this behavior...the NATR is the suggested standard hardware.  We are getting various responses from distribution and support.  ...I was hoping someone in the community could confirm.   Thanks for your time!  
  8. Hi I'm trying to set up Modbus RTU communication between FX3U PLC and a weigh module. I would use the ADPRW command using 0X03 to read the 16 bit Holding Register but in the weigh module the Data Address/Holding Register of the value I want to get is 400047 - 400048. How to translate the value in 16 bit?   Thanks, Fabio
  9. Hi,   we have a Mitsubishi PLC Fx3U-128MT and a A&D weighing module AD 4212L. The weighing module supports MODBUS RTU communication via RS-485. We are looking for the most affordable and simpler way to establish communication between PLC and weighing module. At pag 20 of the manual " MODBUS Serial Communication Edition " https://dl.mitsubishielectric.com/dl/fa/document/manual/plc_fx/jy997d26201/jy997d26201g.pdf there are three options of communication equipment. According to your experience, what specific interfaces do you suggest us to invest in? Thanks    
  10. Hello,   Any one  have idea how to read and write variable for Schneider tm221 plc with Modbus function codes 3,6,16. I attached file for power supply communicator with registers, I need to adjust power supply from 25% up to 100. Please need help. Best regards,   Chyngyz   Modbus OPERATING INSTRUCTIONS.pdf
  11. Hi all, I'm having an issue with EcoStructure Control Expert where when using DTM browser I try to connect but I get a message "No Ethernet/IP device at specified address...." My issue is that I had a device communicating using modbus but it has stopped and I cannot diagnosis the issue. I can ping the address and run a modbus poll from a PC on the network and everything performs correctly. Any help would be greatly appreciated. 
  12. Need help in table scrolling

    Hi all, We have a DOP 107CV HMI we interface this HMI with microcontroller through RS485 Modbus protocol. I'm new to HMI and PLC's although we are successful in interfacing HMI with Controller(Communication Established successfully) We made a table in HMI and allotted some registers to Modbus address and data is transferred from controller to HMI up to this we are good in communicating Since the table created is static and we cannot scroll down from that table so, to overcome this problem we found History buffer and made PLC trigger and allotted address. In that History Buffer we created 7 rows and the data is sample whenever we triggered the PLC in that case scrolling is working fine, but the problem we are facing is whenever we update 3 rows out of 7 and triggered the PLC only 3 samples are updated in first column and in the next step we updated the other 4 rows and triggered the PLC the data is sampled on next column but we required it to be sample on first column instead of second.  
  13. Delta plc Communication Issue

    Dear allI have DVP14SS211R series Delta PLC Which is having 24V DC supply voltage. I am using PLC as master and My end device as slave. My slave device set device_iD=1I am using Modbus RTU protocol for Function code1baud rate =9600parity =noneStop bit=1data length=8I would like to know how to send request with Function code 1(Read coil Register). i have attached code reference. Communication block it wont give error it shows 0 .means No error
  14. 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 https://drive.google.com/file/d/1Tr367wfVCRG6vvKcsOFyTKG_FExAsnVy/view can any one help me? sorry for my English
  15. 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 MTCP_ETN_Client.zip  from https://www.myomron.com/index.php?action=kb&article=1245. It works perfectly. But I have three SLAVE UNITS to communicate to. I'm trying to do this using [524]Modbus_TCP_FB.zip 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
  16. 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.
  17. Hi all, New to the forum. I've been pretty much able to do the things I wanted with Beckhoff, but now I'm finally running into a problem I can't seem to solve alone. I'm trying to set-up Modbus RTU RS485 communication in Twincat3, using an EL6021. I've implemented a sample program from the Beckhoff website, but can't get it to work. I've got the feeling I need to properly set up the EL6021 but most information on the Beckhoff website is about the KL-series IO. Does anybody have experience with this? The strange thing is that, when I enable the function to read some slave's registers, BUSY is set and remains set. No timeout is triggered. I don't have a slave connected yet but I would at least expect to see something on the output of the terminal, and then a timeout. I've bridged TxD+ and RxD+, and TxD- and RxD- and set 8000:06 of the EL6021 TRUE, half duplex mode enabled). A scope connected to TxD+ and TxD- shows nothing. Code added below. I've added a GVL called 'Variable_Configuration' with the following: VAR_CONFIG     Main.MB.InData AT %IB0 : MB_KL6inData5B;     Main.MB.OutData AT %QB0 : MB_KL6outData5B; END_VAR And then the MAIN: PROGRAM MAIN VAR     bIoSyncMaster AT %I* : BOOL;     MB : ModbusRTUmaster_KL6x5B;     MBLedDriver : ARRAY[1..10] OF WORD;     tmpExecute : BOOL;     bError : BOOL;     bBusy : BOOL;     iErrorId: MODBUS_ERRORS;     iNoDatByteRead: UINT;     count: INT;     freebyte: INT;     TxError: INT;     TxBlocked: BOOL; END_VAR MB(     UnitID:= 41,     Quantity:= 4,     MBAddr:= 16#0020,     cbLength:= SIZEOF(MBLedDriver),     pMemoryAddr:= ADR(MBLedDriver),     Execute:= tmpExecute,     Timeout:= T#5S ,     BUSY=> bBusy,     Error=> bError,     ErrorId=> iErrorId,     cbRead=> iNoDatByteRead);      MB.ReadRegs(); count := MB.MBMaster.com.Buffer.Tx.count; freebyte := MB.MBMaster.com.Buffer.Tx.FreeByte; TxError := MB.MBMaster.com.Buffer.Tx.Error; TxBlocked := MB.MBMaster.com.Buffer.Tx.Blocked; tmpExecute:=FALSE;    
  18. 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.  
  19. 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.   https://www.myomron.com/index.php?action=kb&article=1245 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
  20. 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
  21. I have a Siemens HMI 6AV2 124-0MC01-0AX0 in my machine. I want to clone the display on the HMI to PC/Laptop. My question is: 1. What software that I need for this task? 2. What kind of interface that I need between the HMI and PC/Laptop (for example ethernet cable, etc)? 3. Do I need to communicate with PLC connected with HMI or can I just connect with the HMI? Thanks in advance for the answer.
  22. 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
  23. 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.  https://drive.google.com/file/d/1-mGzpEvw4UlewWhR9k3wOd1mO-uhsklL/view?usp=drivesdk Is that K0= 0000 K2 = 2000. K3=3000 ? Any suggestion please. I'm really appreciated your comments.❤️  
  24. Hello I have a wago PLC and i try to communicate to a device through RS485 using the module 750-652. I tried using the WagoAppCom library and came up with this code But i always get errors regarding FB_init block. I though the instance would be automatically matched. I still can't see how to resolve this as Wago library documentation is very poor and contains 0 examples. Has anyone else solved serial comms problems?  
  25. Good day everyone!   I have some question relate with above subject. While i try make protocol for the CJ2M PLC.  i found out "Primary Expression (yN+x)" function but i cannt understand what`s this for. even i tried to find in the reference manual. i can not.  you can find it "Message Editor" -> "Message Variable" -> "Variable" sorry i tried to upload picture many times but it kept showing failed to upload.    hope so i could find the answer. thank you!