GE LM10, Instruction Manual

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5–52 LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
DEVICENET OPERATIONS CHAPTER 5: COMMUNICATIONS
Assembly Object, Class Code 4, Instance 105
5.1.7 Connection Object
The connection objects manage the characteristics of each communication connection.
There are three instances of the connection object in the device. Explicit connection
(< 50ms response), input/output connection poll, (< 10ms response), and input/output
connection Cos/Cyc (< 10ms response)
Connection Object, Class Code 5, Services:
Connection Object, Class Code 5, Attributes:
Connection Object, Class Code 5, Instance 1 (explicit message connection):
Data formats for device inputs
Bytes Data Length Name/Description Data
Format
Value
22 bytes 1 word Motor status F22 ---
1 word Cause of trip F20 ---
1 word Phase A current UINT × 0.1 A
1 word Phase B current UINT × 0.1 A
1 word Phase C current UINT × 0.1 A
1 word Ground current UINT
×
0.1 A
1 word Voltage UINT volts
1 word Power factor UINT × 0.01
1 word Power UINT × 0.1 kW
1 word Average current UINT
×
0.1 A
1 word Current unbalance UINT %
Attribute Access Name/Description Data Type Value
3 Get Poll Data Group 4 see below see below
Data Formats for Device Inputs
Bytes Data Length Bytes Name/Description Data
Format
Value
7 bytes 1 byte 1 Motor status F21 ---
1 word 2 (Hi), 3 (Lo) Phase A current UINT
×
0.1 A
1 word 4 (Hi), 5 (Lo) Phase B current UINT × 0.1 A
1 word 6 (Hi), 7 (Lo) Phase C current UINT × 0.1 A
Code Name and Description of Services Available to this Object
0x05 Reset the connection - restart timer
0x0E Get_Attribute_Single: Returns the contents of the given attribute.
0x10 Set_Attribute_Single: Sets the contents of the given attribute
Attribute Access Name/Description Data Value
none --- --- --- ---
Attribute Access Name/Description Data Type Value
1 Get State BYTE 0x03
2 Get Instance_type BYTE 0x00, 0x01
3 Get Export class trigger BYTE 0x83