AlexUT

You should not fill both, Client and Server configuration. Only one. In this case for Server. We managed online session today and established TCP Online communication between U90Ladder and PLC. Unfortunately I have no LabView experience and cannot help with it. May be somebody did it? If yes - please share experience. *I found by Google ( search for "labview modbus tcp read"): "Basic MODBUS TCP/IP Read Holding Register using LabVIEW" https://forums.ni.com/t5/Example-Programs/Basic-MODBUS-TCP-IP-Read-Holding-Register-using-LabVIEW/ta-p/3499688?profile.language=en May be this will help. B.R.

What protocols Banners DXM 100 supporting on Ethernet interface? - MODBUS TCP? - Other? More information -better help.

No, it is not recommended. This will disturb to PID Autotune. Set desired SP, then run Autotune. B.R.

Hi, It is not recommended to use power-up IP configuration (without Ladder configuration). It may be wrong for many reasons. Preferred to set configuration from Ladder. This will warrant right configuration. By the way, in PLC Tools & Applications there is support for DHCP for Enhanced Vision controllers. https://unitronicsplc.com/support-tools-and-applications/ http://unitronicsplc.com/wp-content/uploads/2015/12/V570_DHCP.zip When you look for solutions, please visit and search not only in Forum topics, but in Unitronics Help Center Articles too. Link: https://support.unitronics.com/ There are many available articles. If you have solution to share, tell us know and we will add it to Articles. B.R.

Hi HuanMejia, Hope you mean Ethernet/IP protocol. Which PLC is Adapter and which is Scanner? B.R. === When you look for solutions, please visit and search not only in Forum topics, but in Unitronics Help Center Articles too. Link: https://support.unitronics.com/ There are many available articles. If you have solution to share, tell us know and we will add it to Articles. B.R.

Hi Flex727, 1. It is recommended to adjust firmware to used VisiLogic version. VisiLogic inform you only if it detect that VisiLogic have newest than PLC firmware. It is possible, that you use one of previous VisiLogic versions, but new (replacement) PLC have newest firmware. It is recommended to keep the same firmware at all used with the same VisiLogic version PLCs. After adjusting firmware, continue with empty program. 2. VisiLogic should work with local copy of project (on PC hard disk) . *VisiLogic save project copy on periodic manner to restore project after abnormal program termination, and in other cases. Later you can save project version at any other media - disk on key (not recommended as main backup), on network drive, on NAS/SAS, by use VCS (version control sustem). *VCS do not know about PLC program structure, so it should save all project. 3. Always keep copy of all used images to be possible restore required one, if need. 4. Always keep number of backup copies. Not only one. Hope more recommendations will be added . Lets collect all and save it as Article in Unitronics Help Center. B.R. === When you look for solutions, please visit and search not only in Forum topics, but in Unitronics Help Center Articles too. Link: https://support.unitronics.com/ There are many available articles. If you have solution to share, tell us know and we will add it to Articles. B.R.

Hi All, Solution DanT suggested is explained in Unitronics Help Center Article (Nov. 2017). When you look for solutions, please visit and search not only in Forum topics, but in Unitronics Help Center Articles too. Link: https://support.unitronics.com/ There are many available articles. If you have solution to share, tell us know and we will add it to Articles. B.R.

thaonhipili123, What do you mean by saying this?

Hi Mshak, Please send your request to support@unitronics.com

Sarkis, You can download and test DataXport https://unitronicsplc.com/software-visilogic-for-programmable-controllers/ https://unitronicsplc.com/Download/SoftwareUtilities/DataXport_3_1_23.exe Install it, define communication channel and it will request information from JZ20 and save it as Excel spreadsheet at each preset time interval. B.R.

Hi Sarkis, Look at U90Ladder examples: C:\Program Files (x86)\Unitronics\Unitronics U90 Ladder\Examples\Communication\ Printing data.U90 Send string with STX and ETX.U90 Use serial port at PC to collect data. B.R.

If your PLC is slave, it answers for SCADA request. So, you do not need to send replay from Ladder. You can look MODBUS IP examples for Slave and Master in Examples directory, where you installed VisiLogic. C:\Program Files (x86)\Unitronics\Unitronics VisiLogic_C\Examples\Version 900\Project examples\Communications\Ethernet\Ethernet MODBUS IP\ Or from "Menu->Help->Examples->Version 900\Project examples\Communications\Ethernet\Ethernet MODBUS IP\ In your case PLC is Slave. You have to configure is as Slave and everything should work. Commands you use are for Master PLC. Other error is that you use Normal Closed contact "Function in Progress". This mean that you send a lot of MODBUS messages to network. Follow MODBUS IP example for Slave to make MODBUS IP working.

You can use one of 2 options: 1. Use MJ20-RS RS232/RS485 isolated COM port and use MODBUS RTU. You can find JZ20 MODBUS RTU examples in directory C:\Program Files (x86)\Unitronics\Unitronics U90 Ladder\Examples\MODBUS Modbus Master.U90 Modbus Slave.U90 Use baudrate 19200. 2. Use MJ20-ET1 Ethernet communication port and use MODBUS TCP. Take care that there is only one IP socket available for communication. You can find JZ20 MODBUS TCP examples in directory C:\Program Files (x86)\Unitronics\Unitronics U90 Ladder\Examples\MODBUS\ JZ20-R10_Modbus_Ethernet_Master_Client.U90 JZ20-R10_Modbus_Ethernet_Slave_Server.U90 MODBUS addressing described in Help. B.R.

Just to update all of you: There are number of Articles at Unitronics Help Center: - Open in Internet Browser next page: https://support.unitronics.com/ Search for SD, and read articles. To summarize: - SD Card should be formatted as FAT32 with only one partition This limits SD card capacity to 32GB. Good to save anything. Hope this information helps to eliminate errors. B.R.

Hi JohnR, There errors are expected, as only one copy of DataXport may be run under selected account. Recommended to create a new account for each copy of DataXport. You have to start DataXpoprt when you are logged as selected user. This will solve your problem. *To access running DataXport for different operations - stsrt, stop. configure, you have run it under current account. When run under system account, you cannot access it anymore. So you have to kill process, and run it again from logged in account. This is by design. B.R. P.S. Provided by Unitronics free software is intended for small PLC networks, and cannot replace specially developed SCADA programs.

Hi, 1. You can use MODBUS protocol, if you find it (or write it) for Arduino. 2. Download Unitronics PCOM Protocol description from next link: https://unitronicsplc.com/Download/SoftwareUtilities/Unitronics PCOM Protocol.pdf This protocol used for VisiLogic to PLC communication. B.R.

Hi, Local structure lost/corrupt data outside of subroutine . When you require to save data to SD, Ladder leave routine and cannot pass right data to SD driver. This is how local variables are working. Use Global structure. Than it will work. B.R.

Hi, I can add to what other peoples recommend. - Check if you connect connectorfirmly. - Some peoples by mistake connect down side (output) 0V and +V to up connector instead of down connector. In some cases peoples spent days to find this. B.R.

Hi, Please see answer for other post:

Hi, Please visit Unitronics Helpdesk https://support.unitronics.com/index.php and search for BacNet. You can find 2 articles, for Vision and for UniStream B.R.

If you mean CT is a Current Transformer, then output is current, not voltage. For current input you have to configure analog input in hardware configuration as current, and use I input. For voltage input you have to configure analog input in hardware configuration as voltage, and use V input. B.R.

Please check if your CT device is compatible with UIA-0800N module. And if you configured right UIA-0800N current loop channel. You have to use linearization to convert current loop input to engineering value. B.R.

It is OK. But why do you use 6 wires cable MJ20-CB200 to connect modem to PLC? Use 4 wires cable (cross-crimped). ! Phone cable may be straight, but you need cross-crimped one ! It is from RS232-CB1 set (MJ10-22-CS25 DB9 to 6p6c adapter + 4 wires cross-crimped flat phone cable). B.R.

Hi Paul, Default baud rate for V350 RS232 communication is 115200 bps. This is why PLC lost communication during system files upgrade. B.R.

Hi Philip, Please send your request to support@unitronics.com B.R.