ITech IT6821 Programming Guide

Communication protocol
Copyright © Itech Electronic Co., Ltd. 6
13
th
byte
Byte 0 of the maximum voltage value
14
th
byte
Byte 1 of the maximum voltage value
15
th
byte
Byte 2 of the maximum voltage value
16
th
byte
Byte 3 of the maximum voltage value
17
th
byte
Byte 0 of output voltage value
18
th
byte
Byte 1 of output voltage value
19
th
byte
Byte 2 of output voltage value
20
th
byte
Byte 3 of output voltage value
21
st
to 25
th
byte
System reserve
26
th
byte
Check sum
Note
We use 1 byte to represent power supply’s state. Each bit is defined as follows:
From higher bit to lower bit:
7 6 5 4 3 2 1 0
 0 bit: The output state, 0 is OFF, 1 is ON.
 1 bit: Over heat protection, 0 is normal, 1 is abnormal.
 2, 3 bit: The output mode, 1 is CV mode, 2 is CC mode and 3 is Unreg mode.
 4, 5, 6 bit: The fan speed, 0 is stop, 5 is the maximum fan speed.
 7 bit: Operation state, 0 is front panel operation mode, 1 is remote control mode.
The frame format is the same as above
3.8 Entering the Calibration Mode (27H)
1
st
byte
Start bit (AAH)
2
nd
byte
Address (0 to 0XFE)
3
rd
byte
Command (27H)
4
th
byte
Calibration protection state
5
th
byte
Calibration password (0X28H)
6
th
byte
Calibration password (0X01H)
7
th
to 25
th
byte
System reserve
26
th
byte
Check sum
Note
We use a byte to represent calibration protection state, each bit is defined as follows:
From higher bit to lower bit:
7 6 5 4 3 2 1 0
0 bit: Protection state, 0 is to disable protection, 1 is to enable the protection.
3.9 Reading the Calibration State (28H)
1
st
byte
Start bit (AAH)
2
nd
byte
Address (0 to 0XFE)
3
rd
byte
Command (28H)
4
th
byte
Calibration protection state
5
th
byte
System reserve
26
th
byte
Check sum
Note
We use a byte to represent calibration protection state, each bit is defined as follows:
From higher bit to lower bit:
7 6 5 4 3 2 1 0

ITech IT6821 Specifications

General

Brand	ITech
Model	IT6821
Category	Power Supply
Language	English