SUNFAR Self-Defined Communication Protocol 74
(3) Command classification
Command classification exists in the data frame sent by main machine, which is
used to define tasks of the frame data to be completed. Frame size varies based on
different command classification. Command classification is defined as below:
Data
0
1
2
3
4
5
6～F
Operation
Read status and feature information of slave machine
Read running parameters of slave machine
Read function code parameters
Modify function code parameters in inverter RAM area and to be lost
after power down (Not to be saved)
Send control command
Modify function code parameters in inverter EPROM area and to be
saved after power down
Reserve
(4) Operation command
The upper machine transmits operation command to slave machine, which exists in
all types of data frame (main machine send the 4th and 5th bit). The operation
command is defined as below:
Data
Operation
00H Invalid command
01H FWD running start
02H REV running start
Stop
03H
Data
Operation
10H Set running frequency of slave machine
Frequency setting of tape running in
11H
FWD running start
Frequency setting of tape running in
12H
REV running start
Frequency setting of tape running in
13H
stop condition
20H Fault reset of slave machine 30H Reserve
Emergent stop of slave
21H
machine
31H Reserve
If don't need to send operation command, please send invalid
command "00H".
E550 Series Universal Low-Power Inverter
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