User manual
  21
3
rd
 byte 
Command  ( 20H)  
4
th
 byte  Operation mode(0 represent front panel operation mode, 1 
represent remote operation mode) 
5
th
 to 25
th
 byte  System reserve 
26
th
 byte  Check sum   
2. Setting the output state ON/OFF (21H) 
1
st
 byte  Start bit (AAH ) 
2
nd
 byte  Address(0~0XFE)   
3
rd
 byte  Command (21H) 
4
th
 byte 
Output state(0 is OFF, 1 is ON) 
5
th
 to 25
th
 byte  System reserve 
26
th
 byte  Check sum   
3. Setting the maximum output voltage (22H) 
1
st
 byte  Start bit (AAH ) 
2
nd
 byte  Address(0~0XFE) 
3
rd
 byte  Command (21H) 
4
th
 byte  The lowest byte of voltage upper limit 
5
th
 byte  The lower byte of voltage upper limit 
6
th
 byte  The higher byte of voltage upper limit 
7
th
 byte  The highest byte of voltage upper limit 
8
th
 to 25
th
 byte  System reserve 
26
th
 byte  Check sum   
4. Setting the output voltage (23H) 
1
st
 byte  Start bit ( AAH ) 
2
nd
 byte  Address(0~0XFE)   
3
rd
 byte 
Command( 23H)  
4
th
 byte  The byte 0 of output voltage value 
5
th
 byte  The byte 1 of output voltage value 
6
th
 byte  The higher byte of output voltage value 
Note:
  We use 4 bytes of Hex number to represent a maximum voltage value. For 
example the maximum voltage is  16.000V, the hex code of 16.000 is 
0X00003EB0, so the 4
th
 byte is 0XB0, 5
th
 bye is 0X3E, 6
th
 byte is 0X00, 7
th
 byte 
is 0X00. 
Note: You can not control the power supply from the front panel when 
the power supply is in calibration mode. 










