Kepware

Experiencing intermittent communication failures across multiple devices on the Allen-Bradley ControlLogix Ethernet driver. Environment:Product: ThingWorx Kepware Server [version, e.g. 6.x — check Help → About] OS: [Windows Server version] Driver: Allen-Bradley ControlLogix Ethernet Affected devices: 1769-L23E-QBFC1 (CompactLogix 5323E), firmware revision 20.12, connected via embedded EtherNet/IP port, connection path <IP>,1,0 At least 6 devices affected across multiple channels (CH_3, CH_4, CH_9, CH_13, CH_14, CH_15, CF_2), IPs in the 10.16.70.x rangeSymptoms (from Event Log, 21/07/2026, 15:07–15:37):Warning: "The following errors occurred uploading controller project from device. Resorting to symbolic protocol." — repeating every ~10–15 seconds per device Warning: "Device is not responding. | ID = '<10.16.70.x>,1,0'." Warning: "Frame received from device contains errors." (device CH073, 10.16.70.114) Between failures, the driver successfully reads device identity (Details

I am currently testing Kepware Server 7 to connect to an OPC Server via OPC DA.The OPC Server, in production, is currently has working OPC DA Client. I have configured the DCOM configuration for the Kepware Server.Set the Launch and Access Permission default and limits with the user that is also in the OPC Server as well as Access Permission. I can browse the tags but when OPC Quick Client (OQC) is connected to the Kepware, data is Bad and not updating. Here are what I observe during the testing:Data is updating:            Kepware Runtime “Use DCOM configuration” = disabled Data is not updating:      Kepware Runtime “Use DCOM configuration” = enabled Data is updating:            “My Computer” authentication level = None and “Use DCOM remote security” is enabled (connected directly to OPC Server) Data is not updating:      “My Computer” authentication level = Default/Connect and “Use DCOM remote security” is enabled. (connected directly to OPC Server)However, I tried to set the authent

Hi,We are trying to make a hardware key work on Windows server VM running on HyperV. There is no USB passthrough, so we were thinking of DIGI AW02 hub or SILEX DS-700. Is this something that can work with HW license? Is there anything I should watch out for? I’m running KEPServerEX 6.18.

Hi,I am looking to connect to Fanuc Robodrill CNC and collect some of the machine parameters.What would I need to get in order to get this? I already have Kepserver with AB driver talking down to the site.Can i set up Focas and Ethernet/IP on Fanuc Robodrill to make it work as plant port already used to communicate with AB PLC on plant?

Using the Open Torque Tool Protocol driver, I am struggling connecting a Atlas Copco MT Focus 6000 (not Power Focus). According to the Kepware driver supported devices, this is a supported device. However, it has proven impossible to connect to the LTR tags and the 1201/1202 tags to get torque results. We have validated that the 'Communication' messages are successful and valid, and can validate data via diagnostics. However, the driver does not recognize the data format and sets most tag quality to 'Bad (Out of Service)' We have tried every message revision and MID8 / MID60.  Is it truly possible to get torque result data from an MTF6000 using Kepware's Open Torque Tool Protocol driver?

Despite the Runtime is still running, I don't seem to be able to use KEPServerEX Configuration to connect to that Runtime even though they are both on the same machine. By reviewing several articles, I'm convinced that there could be some hidden Config Client that is still holding on to that session, therefore I won't be able to connect to the Runtime Project. Should I restart the entire machine? or just the Runtime service? or both? 

hi all,I’m trying to setup a Modbus TCP/IP connection on a thingworx Kepware server 6.18, to an energy meter from Circutor (CVM-E3-MINI-ITF-WiEth, manual can be found here M170F01-03.pdf). I’ve setup connections to other energy meters before using Modbus TCP/IP without issues, but with this device I keep getting unrealistic values.I’ve literally tried using all different combinations on Data access & encoding, but the output I’m seeing seems either extremely high or extremely low, sometimes more or less stable but often also varying a lot which can normal if the byte order was swapped.The manual doesn’t really tell much on the Modbus-TCP setup, like what device-id I need to be using. So far I’ve tested mostly with device-ID 1 which seems most logical in that case, but I’ve used other device-id’s like 2 or 7.I’m hoping anyone has some experience with these types of devices or recognizes this type of behaviour and has some ideas on how to solve it.Many thanks in advance.H.

Hi Experts,I'm looking for guidance from Kepware, ThingWorx, and security experts regarding certificate handling between ThingWorx and Kepware, particularly around REST-based integrations and Java truststore behavior.BackgroundUsing Kepware IoT gateway I am downloading MES data.During troubleshooting of a Work Order (WO) download issue between ThingWorx and Kepware, observed that:In one environment, WO downloads failed and the issue appeared to be related to an expired Kepware REST server certificate. After addressing the certificate issue, WO downloads resumed successfully. However, in other environments, the Kepware REST server certificates were also expired, yet ThingWorx-to-Kepware communication and WO downloads continued to function normally.Initial investigation suggested that the difference may be related to the Java truststore (cacerts) contents on the ThingWorx servers. In some environments, the Kepware certificate appears to be trusted/imported into the JVM truststore, while

I currently have a KEPServerEX 6.7.1054.0 instance running on a production server. The original application owner is no longer with the company, and unfortunately, the installer for this exact version is not available in our internal software repository.I do not see a way to obtain this exact legacy installer from PTC, so I am evaluating whether it is safe to proceed using a newer KEPServerEX installer within the 6.x major version.Before moving forward, I would like to confirm a few things to minimize risk in a production environment: License Compatibility Is licensing for KEPServerEX 6.7 generally forward-compatible within newer 6.x releases (e.g., 6.14 or later)? Specifically, will existing licenses (including licensed modules) remain valid after an in-place upgrade? Upgrade Risk / Downtime Considerations Has anyone performed an in-place upgrade from 6.7 to a newer 6.x version in production? Were there any licensing reactivation issues or unexpected service interruptions? Module

Hi,I am using Kepware Server v7.0.236 with FTView v16 on Windows Server 2025 in a Domain setup.  The Kepware Server is installed on the same server as the FTView application.  I have a FTView Client PC (Windows 11 24H2) which runs the FTView client.  The problem is when I run the FTView client on the W11 PC any tags on a graphic which directly address the Kepware server don’t read. I’ve gone through every step of the Kepware “Configuration Guide Remote OPC DA (DCOM)” and had a 2 hour Teams session with Kepware UK Tech support (MAC Solutions) while I’ve had remote desktop connection to the server. We went through the settings on both the Server and Client step by step and confirmed the recommended settings were in place and even uninstalled/reinstalled Kepware but nothing has worked.Anyone had similar issues and found solutions ?

Hi,We are getting frequent warning events in the Allen-Bradley ControlLogix Ethernet Driver even though there are no changes at the PLC end. Communication is mostly stable but warnings keep appearing.Has anyone faced this? Any insights on possible causes or troubleshooting steps would be helpful.Thanks!

Not able to read correct/exact data of siemens S7-300 PLC tags, datatype is TIME OF DAY/datetime/time.Thingworx Kepware Server v6.16.217.0

I have upgraded our Kepware system and I need to remove LinkMaster and the OPC server that is with it.  Since everything seems to break Kepware licenses, are there precautions that need to be taken in uninstalling LinkMaster or can you just use the Windows Uninstaller?

Hello, Has any configured KEPServerEX to be able to run timers between a start and end trigger tags? I want to be able to setup Operation Cycle Time Logging from plcs tags and be able to calculate the time that it takes for the operation. Example: Timer between hit of a start button and final test saying that the test passed without having to create a timer in the plc itself to monitor this operation Thank you

As per the original post.   Hi,   I have the similar problem as NM_12850686. Could you please share the port issue solution?   Here is my setup: Cleco Controller mPro200 - Open Protocol - Port 9002 - Activated Cleco Controller mPro200 - TorqueNet- Port 12345 - Activated Cleco Controller mPro200 id : 192.168.50.20 KepServerEx - Channel:TorqueToolEthernet - Device:Cleco (Open Protocol - 192.168.50.20 - Port: 9002)   Both the controller and the port can be ping successfully from the PC.   However, none of the tags receives information from Cleco. Could you please look into this?   Thank you,LP

Hi, I have a customer that is using Kepware Server for OPC DA / OPC UA / OPC DA communication between two systems. At the moment we are having issues with certain slow updating tags (booleans and integers) that freezes and are not updated between the two systems. Continuous updating values are no issue... The issue seem to be that the tags gets timed out and are not correctly mirrored between the systems. If we create local subscriptions on the KepServer node on the actual tags the error seem to disappear. Is there a way to configure kepware to establish the subscription to the source tags regardless of the client status? We cant find any correlating error messages in kepware. 

Hi there, I’m trying to set up a connection between Modbus TCP driver in Kepware Server 7 and modbus ModRSsim2 simulator.Port 502 and device ID = 1 are used in both ends.When Kepware starts, it shows the following line i log window:   Channel1 | Starting unsolicited communication. | Protocol = 'TCP', Port = 502.   Should it be something like Modbus TCP Client/Master mode instead ?In Kepware Server 7 where do you switch between Modbus TCP Client/Master mode and Modbus TCP Server/Slave/Unsolicited mode when you set up a channel ?Any guidance would be greatly appreciated.Thanks in advance,Henrik 

We have a connection issue between KepserverEx 6.18 and Janitza UMG96-S2 power measuring device. The connection is working and the tags can be readed via QuickClient but during the reading the quality of some tags randomly switching from good to bad for a while. The strange is that not all of the tags quality switches and it happens randomly. Does anyone has a similar issue with a Modbus TCP connection?

Hi,We are facing with issue that we are not sending the data thru MQTT.On Kepware side there was no message that we are disconnected from MQTT.After several restarts of the Kepware IoT service, the problem was solved, but it reappeared after some time.We have openlogic-openjdk-jre-8u482-b08-windows-x32 JRE version installed on Kepware server. Thanks in advance.

I Transferred a Perpetual License,License shows as ‘good’ in the license utility.License shows as ‘Active’ on the Kepware website.BUT KepserverEX is still showing a 2hr time limit, after which, it deactivates. License support expiry is 10/2019.I am uncertain what Kepserver version it was originally running on.Now running on Kepserver 6.18.318.0 QUESTIONS:Is this a Kepserver version issue? How do I see what version of kepserver my licenses need?Or has Kepware made it so you can't transfer older licenses without paying?

What device-model correlates to the F3SP53-4s CPU yokogawa controller driver?  I cant seem to correlate the options (UP27 UP150 UP350 UP550 UP750 UT37 UT38 UT130 UT150 UT150L UT152 UT155 UT320 UT350 UT350L UT351 UT420 UT450 UT520 UT550 UT750 US1000) with the model. Are there options I’m missing?  Am I using the right channel driver? 

I have a requirement for taking IEC61850 data from an IED device into the Kepserver. After which i need Factorytalk view SE using OPC UA client to read that data. How can I go about it?

Kepware dooesnt allow for logical/logical non-blocking protocols for rockwell PLCs, when accessing Program tags. This means that if an OPC client needs to access program tags, the PLC needs to be setup with Symbolic addressing, which really slows down the R/W rates on the Kepware OPC UA server. Anyone faced this issue?

We are running KEPServerEX​ as an OPC UA Client​ in a production environment to connect to an IGS OPC UA Server. The total tag count is around 6,000.The issue is that KEPServer frequently suffers from connection losses and reconnections, accompanied by socket errors. Simultaneously, when checking the tag quality via Quick Client (QC), the status shows BAD. Although performing a Reinitialize​ temporarily restores normal operation, the problem recurs frequently, leading to significant data loss. This instability has caused serious frustration for the customer.How can we resolve this issue?

Hello, i’m facing an issue with KepserverEX6 not updating values according to specified scan rate (1000ms)  from a Modicon M580 PLC. Modbus TCP/IP driver is set, i’m using 241 tags, i use only one channel and one device. Instead of 1s i see values update roughly 5-15 seconds. There are no other clients in Kepware communicating to the same device, only one OPC UA client reads/writes the same data from localhost (soft-PLC installed in the same server where Kepware is). The same soft-PLC in parallel reads/writes data in a different channel (Simulator Driver), and there everything is okay. So i don’t think issue is coming from the soft-PLC. When i use quick client on the Modbus TCP/IP channel i also see data updating slow.Network card is 1gbit.  My channel settings that could affect the communication are following:Write Optimization :Write only latest value for all tagsDuty Cycle is set to 10Communication Serialization :Network Mode is Load BalancedEthernet Socket utilization is set One or