12. CAN communication (SGC 120 only)
12.1 About the CAN communication protocol
SGC 120 supports a CAN based protocol, which is used to read measurement values, status of alarms and derived calculations
(such as cumulative power), as well as to send mode change and start/stop commands to the controller.
Connection details:
•
Baud rate used for communication is 250 kbps
•
ID of the controller is fixed to 0x01
•
ID scheme for CAN communication is Standard ID (not extended ID)
•
Packet size used for communication is 8 bytes
12.2 CAN communication structure
The controller continuously broadcasts measurement values, status of alarms and commands, and derived calculations. Additionally,
a set of commands can be sent to the controller. Response to the commands is a part of the data that is broadcast.
Communication structure, page 0
Register offset
Value
Scale factor
Unit
Bits/Sign
0
Protocol revision
-
-
Unsigned
1
Generator L1-N voltage
1
V
Unsigned
2
Generator L2-N voltage
1
V
Unsigned
Communication structure, page 1
Register offset
Value
Scale factor
Unit
Bits/Sign
3
Generator L2-L3 voltage
1
V
Unsigned
4
Generator L1-L2 voltage
1
V
Unsigned
5
Generator L3-N voltage
1
V
Unsigned
Communication structure, page 2
Register offset
Value
Scale factor
Unit
Bits/Sign
6
Generator L3-L1 voltage
1
V
Unsigned
7
Generator L2 frequency
1
Hz
Unsigned
8
Generator L1 frequency
1
Hz
Unsigned
Communication structure, page 3
Register offset
Value
Scale factor
Unit
Bits/Sign
9
Generator power factor L2
1
-
Unsigned
10
Generator L3 frequency
1
Hz
Unsigned
11
Generator power factor L1
1
-
Unsigned
USER MANUAL 4189341226A UK
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