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10. Appendix D: DeviceNet Objects
ID Access Name Need Type Value
16#03 Get / Set Transport class trigg er Required BYTE 16#83
This attribute defines the behaviour of the connection. In the case of the LUFP9 gateway’s “Explicit Connection”
object, this attribute takes the value 16#83, broken down as follows:
Bits 0-3 = 2#0011.... Transport Class = Class 3.
Bits 4-6 = 2#xxx....... Value ignored in the case of a data server.
Bits 7 = 2#1.......... The gateway behaves as a data server responding to queries from a DeviceNet client.
16#04 Get / Set Produced connection ID Required UINT 2#11• ••xx xxxx
The value of this attribute is placed in the CAN protocol’s Identifier Field when the connection goes into
transmission mode (group 3 messages). The term “xx xxxx” represents the 6 bits of the address of the gateway’s
DeviceNet node. The term “• ••” represents the message ID.
E.g. 16#070A = 2#111 0000 1010 (group 3 messages; ID of the messages = 4; Gateway located at address 10).
16#05 Get / Set Consumed connection ID Required UINT 2#11• ••xx xxxx
The value of this attribute corresponds to the content of the CAN protocol’s Identifier Field for the messages the
connection should receive (group 3 messages). The term “xx xxxx” represents the 6 bits of the address of the
DeviceNet node. The term “• ••” represents the message ID.
E.g. 16#0601 = 2#110 0000 0001 (group 3 messages; ID of the messages = 0; Producer located at address 1).
16#06 Get / Set Initial comm. charact eristics Required BYTE 16#21
This attribute defines the Group or Groups of Messages by which the productions and consumptions associated
with the “Explicit Connection” object are carried out. Please see chapters 3-2. et 5-4.3.6. of volume I of the
DeviceNet specifications for further details on this subject.
16#07 Get / Set Produced connection size Required UINT 516
Maximum number of bytes which can be transmitted via this instance’s connection.
16#08 Get / Set Consumed connection size Required UINT 516
Maximum number of bytes which can be received via this instance’s connection.
16#09 Get / Set Expected pack et rate Required UINT 10,008 (unit = 1 ms,
per 10 ms step)
This attribute allows the gateway to evaluate the values of the Transmission Trigger Timer and the
Inactivity / Watchdog Timer for exchanges made using the “Explicit Connection” object. Please see chapter 5-4.4.
in volume I of the DeviceNet specifications for further information on this subject.
16#0C Get / Set Watchdog timeout action Required USINT 3
This attribute defines the action taken when the watchdog timer is triggered or when the connection is inactive.
The various possible values are as follows: 0 (Transition to timed out), 1 (Auto Delete) et 3 (Deferred Delete).
16#0D Get / Set Produced connection path length Required UINT 0
Size of the USINT array of attribute 16#0E (produced connection path).
16#0E Get / Set Produced connection path Required USINT […] (empty path)
This attribute defines the local path (without MAC ID) of the gateway’s DeviceNet object used to produce the
connection’s data. In the case of the current instance, there is no production path for the “Explicit Connection”.
16#0F Get / Set Consumed connection path length Required UINT 0
Size of the USINT array of attribute 16#10 (consumed connection path).
16#10 Get / Set Consumed connection path Required USINT […] (empty path)
This attribute defines the local path (without MAC ID) of the gateway’s DeviceNet object used to receive the data
consumed by the connection. In the case of the current instance, there is no consumption path for the “Explicit
Connection”.