Devicenet Protocol; Poll Data; Change Of State (Cos); Overview - GE 469 Communications Manual

DEVICENET PROTOCOL

DeviceNet Protocol

Overview

Poll Data

Byte
1, 2 (low, high)
3, 4 (low, high)
5, 6 (low, high)
7 to 10 (low, high)

Change of State (COS)

124
The device profile is an extension of the Generic Device Profile (0x00). It is a group 2 only
server. The MAC ID and baud rate are programmable through relay front panel or the
EnerVista 469 Setup software. The polling function produces 10 bytes of data (described in
assembly object Class 04h, Instance 64h, Attribute 03h). The COS\CYC operation produces
4 bytes of data as per Class 04h,Instance 66h, Attribute 03h.
The following master/slave connection objects are supported by the 469 DeviceNet
implementation:
• Explicit Messaging Connection
• Poll I/O Connection
• Change of State or Cyclic I/O Connection
The following objects have been implemented:
Object
DeviceNet objects
Identity object
Message Router object
DeviceNet object
Assembly object
Connection object
Acknowledge Handler object
469 specific objects
I/O Data Input Mapping object
Parameter Data Input Mapping object
The polling data function produces 10 bytes of data as described under Class 04h,
Instance 64h, Attribute 03h.
Name/Description
Relay status
Input switches and output relay status
Motor thermal capacity used
Time to trip
The COS data is described under Class 4, Instance 66h, Attribute 03h. The following data is
provided
Class
01h
02h
03h
04h
05h
2Bh
A0h
B0h
Table 9: Poll Data
Units
---
---
%
seconds
469 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
COMMUNICATIONS GUIDE
Format
Default, Min, Max
Code
0, 0, FFFF F162
0, 0, FFFF F163
0, 0, 100 F1
-1, -1, 99999 F20