ABB DSMB 151 57360001-K/9 Redundant channel module

The Capabilities Request PDU command permits an application program to request the supported capabilities of the EGD implementation on the destination node. A Capabilities Request sent from a requesting node must be followed by a Capabilities Response message from the responding node.The Capabilities Response command PDU is sent in response to a Capabilities Request. This message returns the functional capabilities and limits of the supported EGD implementation on the responding controller.The Summary Request PDU command permits an application program to request a summary of the exchanges configured on a given node. This allows a user to get a complete list of all exchanges defined. The Index field is normally 0 and is used to request a block of summaries in nodes which contain a large number of exchanges. A Summary Request sent from a requesting node must be followed by a Summary Response message from the responding node.

Summary Response

 The Summary Response PDU is used to respond to a Summary Request. This PDU returns a list of exchanges which are currently defined on the responding node. This message is of variable length; the number of summaries, or cells, included in the message is returned in the header of the message. If the number of cells returned is less than the total number of cells, remaining summaries can be retrieved by subsequent requests with a larger index variable.The following six items are referred to as the exchange Cell. Each Cell targets one [EGD Exchange] command line present in the EGD module’s configuration file. Cell Qty is limited to [EGD Exchange] command lines present in the module’s configuration file.

Statistics Request

 The Statistics Request PDU command permits an application program to obtain the current operating statistics of the specified exchange. The exchange must be valid on the destination node. A Statistics Request sent from a requesting node must be followed by a Statistics Response message from the responding node.The Statistics Response PDU command returns the operating statistics for the Producer and Exchange ID specified in the request message.

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