CG20 369 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
DEVICENET PROTOCOL CGCOMMUNICATIONS GUIDE
Note
The value that is written acyclically to either FORCE OUTPUT RELAYS or BLOCK
PROTECTION FUNCTIONS
must be a 16-bit value. The lower byte contains the bitmask
data (as per format codes noted) and the upper byte written must always contain a value
of zero.
Refer to the 369 Instruction Manual, chapter 5 for additional information about the force
output relays feature. Refer to the 369 Instruction Manual, chapter 5.3.4 for additional
information about the protection function blocking feature.
3.7 369 Relay Profibus-DPV1 Loss Of Communication Trip
If the 369 detects a problem in communicating with the Profibus master, the Profibus Loss
of Communications feature can be used to trip any combination of output relays. Refer to
the following sections for more information regarding this feature:
2.5: 369 Relay Profibus-DP Loss Of Communication Trip
369 Instruction Manual, chapter 5: 369 Communications (for information regarding the
setpoints for this feature).
4 DeviceNet Protocol
4.1 DeviceNet Communications
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 369 Setup software. The polling function consumes one byte of control data
(described under assembly object class 04, instance 96h) and produces data as per Poll
Data Group 1, Poll Data Group 2, or the User-Defined poll data (described in assembly
object class 04, instance 64h). The COS\CYC operation produces 4 bytes of data as per
Class 4, Instance 66h, Attribute 3.
Table CG–5: Profibus-DPV1 Acyclic Write Data
OBJECT SLOT INDEX LENGTH DESCRIPTION FORMAT
00
0 2 bytes Force Output Relays F141
2 2 bytes Block Protection Functions F180
Table CG–6: Profibus-DPV1 Acyclic Read Data
OBJECT SLOT INDEX LENGTH DATA ITEM FORMAT
00
0 2 bytes Trip Relay Status F150
2 2 bytes Alarm Relay Status F150
4 2 bytes Aux1 Relay Status F150
6 2 bytes Aux2 Relay Status F150
8 2 bytes Functions Currently Blocked F141
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