GE 469

128 469 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
DEVICENET PROTOCOL COMMUNICATIONS GUIDE
The attributes in this class can be accessed using Change-Of-State Connection or
Explicit Messages Connection. This data could be polled from Class A0h, I/O Data
Input Mapping Object instance 1, attribute 3 as well.
The Modbus memory map should be consulted for more details on the output mes-
sages.
Connection Object (class code 05h)
The class and instance attributes for the connection object (class 05h) are as follows:
Table 19: Connection object, Class code 05h, Attributes:
Attribute Name/Description Services Default, Min, Max Data type
01h Revision of the DeviceNet object Get_Attribute_All 2, 2, 2 UINT
Table 20: Connection object, Class code 05h, Instance 01h (explicit message connection), Attributes:
Attribute Name/Description Services Default, Min, Max Data type
01h
State of the object.
0 = Nonexistent; 1 = Configuring; 3 =
Established; 4=Timed Out;
5 = Deferred delete
Get_Attribute_Single 1, 0, 5 USINT
02h
Instance type. Indicates either IO or
messaging connection.
Get_Attribute_Single 0, 0, 0 USINT
03h
Transport class trigger. Defines
behavior of the connection.
Get_Attribute_Single 83h, 83h, 83h USINT
04h
Produced Cxnx ID. Placed in CAN
identifier field when the connection
transmits.
Get_Attribute_Single N/A, N/A, N/A UINT
05h
Consumed Cxnx ID. CAN identifier field
value that denotes message to be
received.
Get_Attribute_Single N/A, N/A, N/A UINT
06h
Initial comm characteristics. Defines
the message group(s) across which
productions and consumptions
associated with this object occur.
Get_Attribute_Single N/A, N/A, N/A USINT
07h
Produced connection size. Maximum
number of bytes transmitted across
this connection.
Get_Attribute_Single 512, 512, 512 UINT
08h
Consumed connection size. Maximum
number of bytes received across this
connection
Get_Attribute_Single 512, 512, 512 UINT
09h
Expected packet rate. Defines timing
associated with this connection.
Resolution is 10 ms.
Get_Attribute_Single N/A, N/A, N/A UINT
0Ch
Watchdog timeout action. Defines how
to handle inactivity/watchdog time-
outs.
0 = Transition to time out
1 = Auto delete; 2 = Auto reset
3 = Deferred delete
Get_Attribute_Single N/A, N/A, N/A USINT
0Dh
Produced connection path length:
Number of bytes in the produced
connection_path_length attribute
Get_Attribute_Single 0, 0, 0 UINT