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6.8 Communications Using Explicit Messages
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Failed Sending or Timeout
The following response is returned if the Explicit Message cannot be sent or times out.
„ Details of Command/Response Blocks
This section describes details of command/response blocks used for the Explicit Message.
[Send Destination Node Address] (Command)
Specifies the node address of the Explicit Message destination.
The local node DeviceNet Master Unit is specified for CMND instruction control data for
Explicit Message Send commands and the actual destination node is specified here.
[Service Code] (Command, Response)
For commands, the service code defined by the DeviceNet is specified.
For normal responses, the value for when bit 15 of the service code specified in the com-
mand turns ON is returned. For error responses, 94 hex, which indicates an error, is returned.
[Class ID] (Command)
Specifies the class ID for the Explicit Message destination.
[Instance ID] (Command)
Specifies the instance ID for the Explicit Message destination.
[Service Data] (Command, Response)
For commands, specifies the data defined by the service code.
For responses, returns the reception data defined by the service code.
[No. of Bytes Received] (Response)
Returns the number of bytes received after source node address.
[Source Node Address] (Response)
Returns the local node DeviceNet node address that was the source of the Explicit Message.
[Error Code] (Response)
Returns the error code defined by the DeviceNet.
28
Response
code
01
Command
code