ITech IT6821 Programming Guide

Frame format
Copyright © Itech Electronic Co., Ltd. 3
Chapter2 Frame format
Frame length is 26 bytes, the format is as follows:
Start
Address
Command
4-25 bytes are information content
Check sum
Description:
 Start bit is AAH, occupies a byte.
 Address range is 0 to FE, occupies a byte.
 Command occupies a byte.
20H----Setting the remote control mode
21H----Setting the output ON/OFF state
22H----Setting the maximum output voltage
23H----Setting the output voltage
24H----Setting the output current
25H----Setting the communication address
26H----Reading the present current/voltage, maximum voltage, setup
voltage/current and operation states of the power supply.
27H----Enter the calibration mode
28H----Reading the calibration mode state
29H----Calibrate voltage value.
2AH----Sending the actual output voltage to calibration program.
2BH----Calibrate current value.
2CH----Sending the actual output current to calibration program.
2DH----Save the calibration data to EEPROM.
2EH----Setting calibration information.
2FH----Reading calibration information.
31H----Reading product’s model, series number and version information.
32H----Restoring the factory default calibration data.
37H----Enable the local key.
12H---- The return information of command operation in power supply.
Note
You must change the power supply to remote control mode firstly, then you can control
the power supply output by computer. The command for remote control is 20H.
If you want to calibrate the power supply, set the calibration information or want to set the
product serial number, you must set the calibration protection mode to OFF state firstly;
the command for calibration protection is 27H.
When the power supply is in calibration mode, it is not allowed to change the output state
of power supply.
 4
th
to 25
th
bytes are information content.
 26
th
byte is check sum, the sum of the former 25 bytes.

ITech IT6821 Specifications

General

Brand	ITech
Model	IT6821
Category	Power Supply
Language	English