Client-side Diagnostics and Monitoring

The MTConnect OPC UA server exposes diagnostics information which can be accessed by any OPC UA Client via a specific set of data items.

1. Server State Data Item

The MTConnect-Server's CurrentState data item exposes the current state of the OPC UA Server Thread within the server service. The following list shows all possible state values:

The MTConnect-Server's CurrentState data item exposes the current state of the OPC UA Server Thread within the server service. The following list shows all possible state values:

Value Description
0 Server Thread is stopped .
1 OPC UA Inititialization started.
2 OPC UA Node Manger started.
3 Server data items and methods created.
4 Agent folder created.
5 All agent threads started and server is running in normal operation state.
6 No agent threads started (since no agents are configured).
7 Server is restarting (due to a restart request from the configuration tool).
-1 Server is stopped since OPC UA Node Manger could not be started.
-2 Server is stopped due to a failure in the agent start sequence.

Agent State Data Item

The Agent's ConnectState data item exposes the current connection state of a specific MTConnect agent. The following list shows all possible state values:

Value Description
0 Connection to agent not established. Occurs when the agent is not enabled.
1 The server has sent a Probe request and has received a proper Probe response.
-1 The server has sent a Probe request but the agent does not answered. This error indicates that the agent's URi is invalid or not reachable.
2 The server has sent a Current request and has received a proper Current response.
-2 The server has sent a Current request but the agent does not replied with a Current response.
3 The server has sent a Sample request and cyclically receives Sample responses. This is the expected state for a proper connection to the agent.
-3 The received Sample response contains invalid data or has an invalid structure.
-4 The server received a bad HTTP status code.
-5 An exception occurred when the server tried to send the Sample request*.
-6 A HTTP timeout occurred while the server waited for the Sample response.
-7 The Sample request has been canceled by the HTTP protocol layer.
-8 A Web exception occurred when the server tried to send the Sample request*.
-9 An Application exception occurred when the server tried to send the Sample request*.
-10 An unspecific exception occurred when the server tried to send the Sample request*.

*) The log file of the OPC UA Server Service contains detailed information about the exception.