Value

Description

RUNNING_0

The Server is running normally. This is the usual state for a Server.

FAILED_1

A vendor-specific fatal error has occurred within the Server. The Server is no longer functioning. The recovery procedure from this situation is vendor-specific. Most Service requests should be expected to fail.

NO_CONFIGURATION_2

The Server is running but has no configuration information loaded and therefore does not transfer data.

SUSPENDED_3

The Server has been temporarily suspended by some vendor-specific method and is not receiving or sending data.

SHUTDOWN_4

The Server initiated a shut down or is in the process of shutting down. This ServerState is intended as an indication to Clients connected to the Server to orderly disconnect from the Server before the Server completes the shut down.

TEST_5

The Server is in Test Mode. The outputs are disconnected from the real hardware, but the Server will otherwise behave normally. Inputs may be real or may be simulated depending on the vendor implementation. StatusCode will generally be returned normally.

COMMUNICATION_FAULT_6

The Server is running properly, but is having difficulty accessing data from its data sources. This may be due to communication problems or some other problem preventing the underlying device, control system, etc. from returning valid data. It may be a complete failure, meaning that no data is available, or a partial failure, meaning that some data is still available. It is expected that items affected by the fault will individually return with a BAD FAILURE status code indication for the items.

UNKNOWN_7

This state is used only to indicate that the OPC UA Server does not know the state of underlying system.

Attribute

Value

BrowseName

ServerState

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

HasProperty

Variable

EnumStrings

LocalizedText[]

PropertyType

Mandatory