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  1. Hello, I'm have some problems with the conversion of two integers to a floating point value. I have a modbus energy meter (SDM120) who works with 32bit IEEE745 floats values. In visilogic I receive two 16bit integers (MI); MI0 : 15643 MI1: -23069 I converted these integers to bits by the 'num to bit' function block. These are the converted value's : MI0 : 15643 --> 0011 1101 0001 1011 MI1: -23069 --> 1010 0101 1110 0011 If I put the two value's behind eachother I get the following binary code: 0011 1101 0001 1011 1010 010
  2. Hi there, I have to update program on a site where we already have 2x samba 43 in place, I will need to poll some modbus values and show them on the displays from 4 RS485 devices, - VSD and soft starters, these will all be on a RS485 to TCP gateway, in my complete program I have made a separate working example of what i'm trying to do, by using 2 spare sambas i have, as a master & slave combo i just wanted to know if its the best practice way of doing it when polling the 24 to 30 different values needed I am also curious about the settings to do with SB168 Link lost a
  3. Hello!, my name is Mario and I ask if someone can please help me with my problem. I try to control a Sinamics G120 with a V350 via modbus RTU, but I can´t do it! The connection of between the PLC and the V350 is: V350 (jumper set "RS485" - Jumper TERM: off) Port 1 - Pins: 1 and 6 Sinamics G120 X128: terminals 2 and 3 Configuration of the project: Sinamics G120 (Starter): V350 (Visilogic) I tried to change some parameters of the communication, but the problem never disappear (status message=5). If somebody can give me some
  4. For the communication with Siemens PLC’s we use an Anybus device. In the version 1.26 everything works fine. With the 1.29 version, the NumOfClients is increasing to 165 and after approx. half an hour no more data is exchanged with the Anybus device. Any ideas for a work around? Is this a Modbus bug in the 1.29 version?
  5. On upgrading my Unilogic program with compiler version 1.29.111, it now reports this error: 'The TCP Remote slave limit of 64 operations has be (sic) reached. (136)' The program previously compiled successfully with compiler version 1.29.26 and .34. I have 11 ModBus Remote Slaves on separate IP addresses, with 10 of which I request a single 64-register transfer, and the eleventh two 32-bit register transfers. If I remove all the Slaves and associated code, then the program compiles. If I then reinstate them it now compiles successfully! I have several versions of my program in d
  6. When I checked my project I notice error on my RS485 CPU COM port it says "Both Slaves have been set to the same communication protocol. Slave1 may be set to TCP/IP, while Slave2 is set to RS485." Does it mean UniLogic RS485 can access only one slave device ?? So if I have more than one modbus slave I have to connect second slave through TCP/IP connection ?? What happens when I have 21 devices ?? I am really screwed if there are this kind of limitation.
  7. My requirement is to connect & operate 6 HMI individually (Without mirroring) with PLC and the 6 HMI screens should view from computer remotely. I Hope to do it with Mqtt protocol or via Modbus. Please can someone help me to try this cos I have done only one project using Unistream PLC with Mqtt protocol previously. Please see the attached draft design of the project.
  8. Good day All Im wondering if someone will be able to assist me with the following. we have a few in house built machinery that runs off Arduino Controllers. We needing to link it up to a Unistream HMI to Display the Data. I know it can be done via Modbus. Im just needing some help with the initial Modbus from Arduino to Unistream setup Please Assist where you can
  9. Hello to all, I am working on a new system where a Unistream B5 TR22 is a Modbus TCP master to 11 Samba PLC's Nothing to exciting but my biggest problem is a lack of knowledge. This is only my second project with a unistream PLC, with the first being a very straight forward ladder program without anything special. i do have a few years of experience with visilogic so that side is not a problem. What i already figured out is how to make the set-up on the master and slave side. the thing i don't get is addressing between the devices. In visilogic i could literally select which mb,mi,ml
  10. hi all I try to connect more then one master to my slave(PLC v130) with MODBUS TCP , the masters need to work simultaneously. can someone send my example how to do it?
  11. Hello, I have a school project where i was tasked to read an MI from a Slave PLC as a Master PLC. I've tried using the help fuction, but i havent seemed to make it work. Thanks in advance
  12. I'm using a V130 and I'm trying to comunicate to clearscada via a sierra wireless modem, my V130 is the slave and I can't find the address for ML's. the addresses shown in help doesn't work.
  13. Hi, I'm new to the RS485 communication protocol. I am trying to communicate with a Siemens SINAMICS V20 VFD with the Unitronics Unistream PLC ( USP-070-B10) The VFD leads to a 3 phase motor I set up the baud rate to 9600, data bit to 8, parity list to none, and stop bit to 1 In addition I set up a remote slave in COM1 of Masters drop down, in MODBUS In the slave configuration I made a coil named "motor" that writes to address 40 every 100 ms I spoke with a Siemens Technician about the driver settings, and could not find a setting to "ECHO" bits to the driver
  14. Hey guys, I wish you could help me with this one... I'm currently doing a project using a pump that communicates by Modbus RTU to my US7-B5-TR22. The serial communication and code is done by USB. I'm aware that you recommend to use a Prolific USB to serial converter, I have a FTDI one that worked perfectly in an other configuration but still modbus using serial by USB. Now I can't understand why on my new configuration it fails. I "sniffed" the communication between the PLC and my pump using my computer and a serial terminal, the request of the PLC and response of the pump are
  15. Hello, I am struggling to understand Visilogic's MODBUS tools. Say I would like to turn a light on and off from the master PLC, while the output is attached to the slave PLC. What would be the best function block to do this? I keep using the FB #5 and I will get the bits set high, but then they will stay high. I am practicing so I can use PTO utilities to control steppers instead of lights. First, I need assistance in understanding why things like MODBUS FB (5) sets and doesn't reset. The attachments are just HMI lights telling you if you get the commands from the Master P
  16. Hi all, I use US5-B10-TR22 to read data from Modbus slaves. Technical documentation of slaves gives such information (see attached picture). Could someone tell if in US5 is the same byte order (didn't find that information). As for now everything looks OK, but I'm afraid that there could be a problem when there will be large numbers accumulated. Thank you in advance.
  17. Good evening, all, I have a project where UniStream US5 controller with RS485 port is used to read data from 8 electricity meters. These are exactly the same model and parameters quantity and type also the same. I thought about making a struct for one meter with all variables needed and then copy and change struct name so I don't have to enter each of these variables for each meter. But there's no way to copy struct in UniLogic. Maybe someone of you has done something like this and can share some advice? One more thing: since no special logic needed, I'm planning to use PLC Commun
  18. Is it possible to have MODBUS TCP (Ethernet) via the CPU Ethernet? I have two separate networks I'm using. My PLC needs to get data from a DCS via MODBUS on a 172.17.100.xxx network and a computer needs to get the MODBUS data from the Unitronics PLC via a 172.16.100.xxx network. Can I do this or do I need to find another solution?
  19. Hello to all. I am working on a project in which I will only get PLC data to an external control system, we will do it in MODBUS. Everything works correctly, but I find two problems: The addressing mapping is 1: 1 accessible from MODBUS, so they could read any record. The same is reproduced in writing, so that accidentally (or not) they could overwrite important values of my program. Could we limit the reading to a certain number of records? Could we limit the writing? Thanks in advance!
  20. Hi I have invested a lot of time without succes to comunicate a US7-B10-RA28(+ module UAC-CX-01RS4) with a ultrasonic device( modbus RS485 ). I want to read holding registers (40001 to 40016). The manufacturer of device recommend to read the holding register (03) ( 40001 to 40016), I did this with unilogic software but without succes¡ In Global Tags show: Modbus Slave Status: 3 Could help me ? I do not Know What is the error?
  21. I use a PLC (US5-B10-TR22) and communicate with a smart meter throw MODBUS TCP/IP. The registers of this smart meter store values as 'single'-precision floating-point variables. Throw the UniLogic is not possible read 'single' values and I did not find a way to do this conversion.. How can I solve this issue? Charalambos
  22. Hello. My Unilogic USP-104_B10 needs to receive information tags from a different PLC (Schneider M340) via modbus I think, and im not sure how to do that. I was wondering if anybody could help me with this or explain what I need to do in order for the PLC's to communicate so I can reiceve tags and inputs/outputs from the M340. I have setup the panel ethernet configuration ip , but now I need to know where to set the M340s IP and if I need a Master Slave function for this to work. Anybody who wants to help a newbie out? Thanks. -Steffen, Norway
  23. Hello, I'm trying to poll some values from Laumas weight transmitter - and I'm kind of stuck. I've tried to read some addresses according to the Laumas manual, but the power-up value in the receiving variable is never overwritten. I get modbus status as -11, which I don't know what means. THe setup: It should be reading all the time if set up as periodic and the active bit is set ? The values when running: Anybody with any hints for me? Thanks, Bjarni
  24. Dear all, We communicate 10 nodes through rs485 communication in v700 port 1..the problem is if my one divice is failture means other 9 nodes getting delayed..kindly provide solution RegArds Mohamed
  25. Hello, I'm just starting my first project with UniStream/UniLogic and I have the PLC hooked to a PC via Modbus, PLC as Slave. I haven't found a way to sync the clock in PLC with the PC clock. Is there a way to set the PLC clock via the Modbus ? Thanks, Bjarni
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