10. Appendix D: DeviceNet Objects
ID | Access | Name | Need | Type | Value |
16#03 | Get / Set | Transport class trigger | 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 | = 2#0011 .... | Transport Class = Class 3. |
Bits | = 2#xxx | Value ignored in the case of a data server. |
Bit 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. characteristics | 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
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 packet 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
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”.
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