5 Parameter Access
5.1 Explicit Messages
DeviceNet is based on the CAN protocol. Every message contains an 11 bit CAN identifier field to define the connection ID.
These CAN identifiers are also used to determine access priority.
The MAC ID is stored in the header of the message, which is split into 4 different message groups, see
.
10
9
8
7
6
5
4
3
2
1
0
Identifier bits
0
Group 1 ID
Source MAC ID
Message group 1
1
0
MAC ID
Group 2 ID
Message group 2
1
1
Group 3 ID
Source MAC ID
Message group 3
1
1
1
1
1
Group 4 ID
Message group 4
1
1
1
1
1
1
1
X
X
X
X
Invalid CAN identifiers
Table 5.1 MAC ID
It is possible to access frequency converter parameters via the standard DeviceNet service explicit message. Two classes of
explicit messages are supported:
Message group 2: Explicit messages take place via pre-defined master/slave connections.
Message group 3: Explicit messages take place via dynamically established lower prioritized connections.
5.2 Object Classes
Access is available to the following standard DeviceNet objects.
Class ID 01h
Identity object
Class ID 10h
Parameter group object
Class ID 03h
DeviceNet object
Class ID 28h
Motor data object
Class ID 04h
Assembly object
Class ID 29h
Control supervisory object
Class ID 05h
Connection object
Class ID 2Ah
AC/DC drive object
Class ID 0Fh
Parameter object
Class ID 2Bh
Acknowledge handler object
Table 5.2 Standard DeviceNet Objects
The following DeviceNet vendor-specific objects are also available:
Class ID 100d to 119d Danfoss classes.
The object classes are described in
chapter 5.3 DeviceNet Object Classes
and
chapter 5.4 Danfoss Object Classes
Parameter Access
Programming Guide
MG92F102
Danfoss A/S © 12/2015 All rights reserved.
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