6 Error Codes (ErrorID)

Error codes are 4 bytes long, data type being DWORD.

NOTE: Bit 29 in this DWORD value is used to differentiate between error codes defined by OPC Foundation and error codes defined by PLCopen or Vendor.

FieldBit RangeDescription
Severity30:31

Indicates whether the ErrorCode represents a good, bad or uncertain condition. These bits have the following meanings:

ErrorType29

Value 0 indicates OPC error. Please find these error codes in OPC UA 10000-4 specification.

Value 1 indicates PLCopen or vendor specific error signaled by BIT28.

NOTE: This bit shall always be zero on the wire.

ErrorType228

This flag can be evaluated only if BIT29 is Value 1.

Value 0 indicates PLCopen error.

Value 1 indicates vendor specific error.

NOTE 1): This bit shall always be zero on the wire.

NOTE 2): This bit shall only be set if bit 29 has value 1, because it is reserved in OPC 10000-4 for future use.

ErrorCode

(Bits 0..27)

DefineDescription
CategoryGeneral
16#A000_0001PLCopenUA_Bad_FW_PermanentErrorInternal, permanent error.
16#A000_0002PLCopenUA_Bad_FW_TempError Temp. error; FB could retry to reach FW.
CategoryConnection
16#A000_0100PLCopenUA_Bad_ConnectionErrorConnection could not be established.
16#A000_0101PLCopenUA_Bad_HostNotFoundThe requested hostname could not be found.
16#A000_0102PLCopenUA_Bad_AlreadyConnectedConnection was already established.
16#A000_0103PLCopenUA_Bad_SecurityFailedConnection failed due to security setup.
16#A000_0104PLCopenUA_Bad_SuspendedConnection is suspended.
16#A000_0105PLCopenUA_Bad_ConnectionInvalidHdlProvided ConnectionHdl is not known.
CategoryNamespace
16#A000_0200PLCopenUA_Bad_NSNotFoundA namespace with the requested name cannot be found on server.
CategoryNode
16#A000_0300PLCopenUA_Bad_ResultTooLongTarget PLC variable is too short for retrieved data.
16#A000_0301PLCopenUA_Bad_InvalidTypeInvalid or unsupported Type.
16#A000_0302PLCopenUA_Bad_NodeInvalidHdlProvided NodeHdl is not known.
16#A000_0303PLCopenUA_Bad_MethodInvalidHdlProvided MethodHdl is not known.
16#A000_0304PLCopenUA_Bad_ReadFailedRead failed for unknown reason.
16#A000_0305PLCopenUA_Bad_WriteFailedWrite failed for unknown reason.
16#A000_0306PLCopenUA_Bad_CallFailedMethod Call failed for unknown reason.
16#A000_0307PLCopenUA_Bad_InParamFailedMethod Call Input parameter conversion failed.
16#A000_0308PLCopenUA_Bad_OutParamFailedMethod Call Output parameter conversion failed.
ATTENTION: this means the MethodCall was executed successfully but the returned values could not be converted.
CategoryAttribute
16#A000_0400PLCopenUA_Bad_AttributeIdUnknownUsed in UA_NodeGetInformation for elements, which are not in this NodeClass existing.
16#A000_0401PLCopenUA_Bad_AttributeIdInvalidUsed in UA_NodeGetInformation for elements, which should exist but don’t.
CategoryMonitoring
16#A000_0500PLCopenUA_Bad_SubscriptionInvalidHdlProvided SubscriptionHdl is not known.
16#A000_0501PLCopenUA_Bad_MonitoredItemInvalidHdlProvided MonitoredItemHdl is not known.
16#A000_0502PLCopenUA_Bad_MonitoredItemSyncMismatchMixed controller sync and firmware sync in same list
16#A000_0503PLCopenUA_Bad_SyncModeInvalidSync mode invalid