Communication Protocol - ITech IT8500+ Series Manual

Communication Protocol

1. Set control mode（20H）
st
1 byte
nd
2 byte
rd
3 byte
th
4 .byte
th th
From 5 to 25 byte
th
26 byte
NOTE
Front panel operation state is not in effect if electronic load is in calibration mode.
2. Set the input on/off state （21H）
st
1 byte
nd
2 byte
rd
3 byte
th
4 byte
th th
From 5 to 25 byte
th
From26 byte
3. Set / Read max input voltage（22H/23H）
st
1 byte
nd
2 byte
rd
3 byte
th
4 byte
th
5 byte
6 th byte
th
7 byte
th th
From 8 to 25 byte
th
26 byte
NOTE
Represent a voltage upper limit value by 4 bytes of Hex. Lower bytes are in the front location, higher
bytes are in the later location. 1 represent 1mV.For Example : The voltage upper limit is 16.000V，
the hex code is 0X00003E80，then the 4th byte is 0X80，5th byte is 0X3E，6th byte is 0X00，7TH
byte is 0X00.
4. Set / Read the max input current .（24H/25H）
st
1 byte
nd
2 byte
rd
3 byte
Start bit ( AAH )
Address (0—31,0XFF)
Command（20H）
Operation mode （0 is front panel operation mode ， 1 is remote operation mode ）
System reserve
Sum code
Start bit ( AAH )
Address(0—31,0XFF)
Command（21H）
Input state（0 is OFF，1is ON）
System reserve
Sum code
Start bit ( AAH )
Address (0—31,0XFF)
Command（22H/23H）
The Lowest byte of max voltage value
The lower byte of max voltage value.
The higher byte of max voltage value.
The highest byte of max voltage value.
System reserve.
Sum code.
Start bit ( AAH )
Address(0—31,0XFF)
Command（24H/25H）
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