SUNFAR Self-Defined Communication Protocol 77
E500 Series Universal Low-Power Inverter
1.3 Description of frame format
1.3.1 Command classification 0- Read status and feature information of
slave machine
Main machine sending frame size is 14 bytes, while slave machine response
frame size is 18 types.
Sent by main machine
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Frame header
Slave address
Slave address
0
Operation command
Operation command
Data classification
0 0
Checksum
Checksum
Checksum
Checksum
Frame end
Slave machine response
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Frame header
Slave address
Slave address
Slave machine response
Status feedback
Status feedback
Data classification
Feature information
Feature information
Feature information
Feature information
Feature information
Feature information
Checksum
Checksum
Checksum
Checksum
Frame end
Note: In accordance with different data classification value in the frame
sent by
main machine, the slave machine will feedback different feature
information.
Data classification
(Sent by main machine)
Feature information (Slave machine response )
6 7 8 9 10 11 12
0
Read model
information of
slave machine
Vo l t a g e
class
0 Power Power Power Power
1
Read series
information of
slave machine
Reserve Reserve Reserve Reserve Reserve Reserve
When frame header, frame end and checksum in data frame
sent by main machine are abnormal, slave machine possibly
fails to make normal response.
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