ITech IT6821 Programming Guide

Communication protocol
Copyright © Itech Electronic Co., Ltd. 5
6
th
byte
The higher byte of output voltage value
7
th
byte
The highest byte of output voltage value
8
th
to 25
th
byte
System reserve
26
th
byte
Check sum
Note
We use 4 bytes of Hex number to represent an output voltage value. For example the
output voltage value is 16.000V, the hex code of 16.000 is 0X00003E80, so the 4th byte
is 0X80, 5th bye is 0X3E, 6th byte is 0X00, 7th byte is 0X00.
3.5 Setting the Output Current (24H)
1
st
byte
Start bit ( AAH)
2
nd
byte
Address (0 to 0XFE)
3
rd
byte
Command (24H)
4
th
byte
To set the low byte of current value
5
th
byte
To set the high byte of current value
6
th
to 25
th
byte
System reserve
26
th
byte
Check sum
Note
We use 2 bytes of Hex number to represent an output current value. For example the
output current value is 1.000A, the hex code of 1.000 is 0X03E8, so the 4th byte is 0XE8,
5th bye is 0XE3
3.6 Setting the Communication Address (25H)
1
st
byte
Start bit (AAH)
2
nd
byte
The current address of power supply (0 to 0XFE)
3
rd
byte
Command (25H)
4
th
byte
The new address
5
th
to 25
th
byte
System reserve
26
th
byte
Check sum
3.7 Reading the Present Current/Voltage, Maximum
Voltage, Setup Voltage/Current and the States of
Power Supply (26H)
1
st
byte
Start bit (AAH)
2
nd
byte
Address (0 to 0XFE)
3
rd
byte
Command (26H)
4
th
byte
Byte 0 of present output current value
5
th
byte
Byte 1 of present output current value
6
th
byte
Byte 0 of present output voltage value
7
th
byte
Byte 1 of present output voltage
8
th
byte
Byte 2 of present output voltage
9
th
byte
Byte 3 of present output voltage
10
th
byte
Power supply’s state
11
th
byte
To set the low byte of current value
12
th
byte
To set the high byte of current value

ITech IT6821 Specifications

General

Brand	ITech
Model	IT6821
Category	Power Supply
Language	English