B&K 8510 Selecting the input on/off state （21H）, Setting / Reading max input voltage（22H/23H）

2nd byte	Address (0—0XFE)
3rd byte	Command（20H）
4th .byte	Operation mode（0 is front panel operation mode ，1 is remote operation mode	）
From 5th to 25th byte	System reserve
26th byte	Sum code

NOTE

Front panel operation state is not in effect if electronic load is in calibration mode.

2. Selecting the input on/off state （21H）

1st byte		Start bit ( AAH )
2nd byte		Address(0—0XFE)
3rd byte		Command（21H）
4th byte		Input state（0 is OFF，1is ON）
From 5th	to 25th byte	System reserve
From26th	byte	Sum code

3. Setting / Reading max input voltage（22H/23H）

1st byte	Start bit ( AAH )
2nd byte	Address (0—0XFE)
3rd byte	Command（22H/23H）
4th byte	The Lowest byte of max voltage value
5th byte	The lower byte of max voltage value.
6th byte	The higher byte of max voltage value.
7th byte	The highest byte of max voltage value.
From 8th to 25th byte	System reserve.
26th byte	Sum code.

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 0X00003EB0，then the 4th byte is 0XB0，5th byte is 0X3E，6th byte is 0X00，7TH byte is 0X00.

4. Setting / Reading the max input current .（24H/25H）

1st byte	Start bit ( AAH )
2nd byte	Address(0—0XFE)

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