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  • Endpoint URL
  • Server certificate (It is the responsibility of the client to ensure iopcua_dpst that it is connecting to the expected server)
  • User login/password, if applicable.

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The TeleControls represent commands received from an OPC UA client -connected to the North plugin- that must be sent to a south service. Therefore, they expose Read/Write variables that will be written by a client, except for the feedback of operation, which is Read-Only (Variable Reply).

As a single PIVOT TC contains the information provided in several OPC variables, the following procedure has been defined to ensure atomicity of the operation. An OPC UA client must:

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OpcUa node ( ns=1;s=<PIVOT_ID>/...)TypeReading fieldDetails

String

co_id

co_id = PIVOT ID


String

co_type

co_type = "opcua_inc" | "opcua_apc" | "opcua_bsc"

Other types not supported in current version.

Value(See below)co_value(See below)
ReplySame as Value
(Read-Only)		Booleanro_reply / ro_idco_reply

Return value

form

from the south

equipment.

service

Quality:

  • reset to OpcUa_BadRefreshInProgress when the Trigger variable is written.
  • set to OPC_UA_GOOD when the acknowledgement is received. (The "Reply" field is updated using the "opcua_reply" reading (See Filter plugin OPCUA to Pivot).

Value :

  • True: The command has been acknowledged (ro_reply=1)
  • False : The command has not been acknowledged (ro_reply=0 or any other value)

Note that there is no timeout handled in the plugin itself. If the remote equipment never acknowledges the request, Reply may never get OPC_UA_GOOD quality.

Trigger

UInt8

co_test

Trigger

UInt8

co_test

co_negative

co_qu

co_se



Writing this node triggers the TC with current values, current timestamp and the command flags depending on the Trigger Value:depending on the Trigger Value:

  • Bit 0 (0x01) : Test
  • Bit 0 (0x01) : Test (bit set <=> co_test=1)
  • Bit 1 (0x02) : Negative (bit set <=> co_negative=1)
  • Bit 2 (0x04) : Pulse (bit set <=> co_qutest=1)
  • Bit 3 1 (0x080x02) : Select (bit set <=>co_se =1).
        Note : co_se=0 is "Execute" and co_se=1 is "Select"

Examples:

  • Writing "0" triggers a Select an Execute TC with Test , Negative and Pulse set to =0
  • Writing "9" (= 8 OR 1) triggers an Execute 3" triggers a Select TC with Test set to 1 and Negative and Pulse set to 0=1

Timestamp

co_ts

co_ts = timestamp (Number of seconds since Linux Epoch). The value is defined by local time when Trigger is written.

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