# OPC UA Connection to Schneider Modicon M241 - Connection Rejected **URL:** \ **Category:** Ignition\ **Created:** [April 18, 2024, 2:16pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050 "2024-04-18T14:16:27Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Thomas\_Magill](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Thomas\_Magill](https://forum.inductiveautomation.com/u/Thomas_Magill)\ **Post date:** [April 18, 2024, 2:16pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/1 "2024-04-18T14:16:27Z")
Have a Schneider M241 that was happily communicating with Ignition for some time and then after a power cycle of the M241, just decided to stop communicating. UaException: status=Bad\_ConnectionRejected, message=io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: /10.80.58.1:4840 We have a ton of other devices that are still communicating OPC/UA so doesn't look like a Module issue. Have configured and reconfigured and configured again on the M241, tried changing ports on both ends, still get connection refused. [OPC UA Server Configuration (schneider-electric.com)](https://product-help.schneider-electric.com/Machine%20Expert/V1.1/en/m241prg/m241prg/OPCUA_Server_Configuration/OPCUA_Server_Configuration-3.htm#XREF_D_SE_0068333_1) [connectionRejected-DiscoveryServerLookupStep.txt](https://forum.inductiveautomation.com/uploads/short-url/frAVAPwaLwf5lQXL4x5sxENv4z1.txt) (9.1 KB) ![miscSettings](https://us1.discourse-cdn.com/inductiveautomation/original/3X/e/c/ec8ebe7c7db4442d063ad576ce03cdfa425e84ea.png) Have posted to Schneider forums without response so figured I'd give it a shot here. Thanks in advance for any suggestions. ---
**Author:** ![Thomas\_Magill](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Thomas\_Magill](https://forum.inductiveautomation.com/u/Thomas_Magill)\ **Post date:** [April 18, 2024, 6:04pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/2 "2024-04-18T18:04:48Z")
Here's a section from the OPCUA Configuration settings file: [Endpoints] Endpoints/size = 2 Endpoints/0/EndpointURL = opc.tcp://0.0.0.0:4840 Endpoints/0/BindURL = opc.tcp://0.0.0.0:4840 Endpoints/0/SecurityPolicies = SecurityPolicy\_None Endpoints/0/UserTokenPolicies = Anonymous,UserName Endpoints/0/PKIStore = PKIStore\_None Endpoints/0/TrustAllClientCertificates = false Endpoints/0/DisableErrorCertificateTimeInvalid = true Endpoints/0/DisableErrorCertificateIssuerTimeInvalid = true Endpoints/0/DisableErrorCertificateRevocationUnknown = true Endpoints/0/DisableErrorCertificateIssuerRevocationUnknown = true Endpoints/1/EndpointURL = opc.tcp://0.0.0.0:4840 Endpoints/1/BindURL = opc.tcp://0.0.0.0:4840 Endpoints/1/SecurityPolicies = SecurityPolicy\_None Endpoints/1/UserTokenPolicies = Anonymous,UserName Endpoints/1/PKIStore = PKIStore\_None Endpoints/1/TrustAllClientCertificates = false Endpoints/1/DisableErrorCertificateTimeInvalid = true Endpoints/1/DisableErrorCertificateIssuerTimeInvalid = true Endpoints/1/DisableErrorCertificateRevocationUnknown = true Endpoints/1/DisableErrorCertificateIssuerRevocationUnknown = true ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 18, 2024, 6:18pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/3 "2024-04-18T18:18:56Z")
Your Ignition configuration looks fine to me. I've never set up this Schneider software but it also looks fine. The error your getting is a low level network error. Usually it's either the server just isn't running, or a firewall is blocking your attempt to connect. ---
**Author:** ![Thomas\_Magill](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Thomas\_Magill](https://forum.inductiveautomation.com/u/Thomas_Magill)\ **Post date:** [April 18, 2024, 8:41pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/4 "2024-04-18T20:41:34Z")
We have another Schneider PLC on the network that is communicating perfectly fine. Downloaded and compared configuration files for both systems, not seeing any differences. ---
**Author:** ![gjw\_rfg](https://avatars.discourse-cdn.com/v4/letter/g/9dc877/32.png) [@gjw\_rfg](https://forum.inductiveautomation.com/u/gjw_rfg)\ **Post date:** [June 13, 2024, 10:00am UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/5 "2024-06-13T10:00:18Z")
I only got it to connect after adding OPC UA Symbol Configuration object. [OPC UA Server Symbols Configuration (schneider-electric.com)](https://product-help.schneider-electric.com/Machine%20Expert/V1.1/en/m241prg/m241prg/OPCUA_Server_Configuration/OPCUA_Server_Configuration-4.htm#XREF_D_SE_0068334_1) ---
**Author:** ![Thomas\_Magill](https://avatars.discourse-cdn.com/v4/letter/t/65b543/32.png) [@Thomas\_Magill](https://forum.inductiveautomation.com/u/Thomas_Magill)\ **Post date:** [July 30, 2024, 3:04pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-schneider-modicon-m241-connection-rejected/89050/6 "2024-07-30T15:04:33Z")
Resolution was reloading firmware on the Scheider device. Not an Iggy issue.