B&K 1786B Frame format, Communication protocol, Description, Setting the remote control mode 20H

4.3 Frame format

Frame length is 26 bytes, the format is as follows:

Start

Address

Command

4-25 bytes are information content

Check sum

Description:

1. Start bit is AAH, occupies a byte.

2. Address range is 0 to FE, occupies a byte.

3. Command occupies a byte.

a. 20H----Setting the remote control mode

b. 21H----Setting the output ON/OFF state

c. 22H----Setting the maximum output voltage

d. 23H----Setting the output voltage

e. 24H----Setting the output current

f. 25H----Setting the communication address

g. 26H----Reading the present current/voltage, maximum voltage, setup voltage/current and

operation states of the power supply. h. 27H----Enter the calibration mode

i. 28H----Reading the calibration mode state

j. 29H----Calibrate voltage value.

k. 2AH----Sending the actual output voltage to calibration program.

l. 2BH----Calibrate current value.

m.2CH----Sending the actual output current to calibration program.

n.2DH----Save the calibration data to EEPROM.

o.2EH----Setting calibration information.

p.2FH----Reading calibration information.

q.31H----Reading product’s model, series number and version information.

r.32H----Restoring the factory default calibration data.

s.37H----Enable the local key.

t.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

4.4th to 25th bytes are information content

5.26th byte is check sum, the sum of the former 25 bytes.

4.4Communication protocol

1. Setting the remote control mode (20H)

1st byte

2nd byte

Start bit( AAH )

Address(0~0XFE)

20