22
The format of power and power factor conversion is the same, that is, the floating point number
is converted into four bytes of data.
Convert this four bytes to a floating point number
III. Communication commands and return data
1.Common commands
10H power take command code
Echo AAH + address 1 + 10H + voltage 4 + current 4 + power 4 + frequency 4 + power factor 4 +
check 1 = 24byte)
2. Host computer control current shift command
26H Switch to fixed low gear mode
Return: AAH + address 1 + 26H + check 1 = 4Byte
Set the meter's current range switching mode to manual fixed low range.
When switching to the manual fixed low position, if the current is greater than 200mA, the meter
is forced to switch to the high current to protect
Low-level measurement circuit, when the current is less than 100mA, switch to low-level mode
again.
27H Switch to fixed high-end mode
Return: AAH + address 1 + 27H + check 1 = 4Byte
Set the meter current level switching mode to manual fixed high.
28H switch automatic shift mode
Return: AAH + address 1 + 28H + check 1 = 4Byte
Set the meter's current range switching mode to automatic mode. The meter shifts automatically
according to the shift point (200mA, 100mA).
29H Read the current shift mode
Return: AAH + address 1 + 29H + current shift mode value 1 + check 1 = 5Byte
The meter returns the current gear mode switching mode value I_MODE.
I_MODE: 0x00——Manually fix low gear
0x01-Manually fixed high-end
0x02-automatic
3. Host computer control instrument measurement mode command
2AH Switch measurement mode to AC
Return: AAH + address 1 + 2AH + check 1 = 4Byte
Set the meter measurement mode to AC AC mode.
2DH read current measurement mode
Return: AAH + address 1 + 2DH + check 1 = 4Byte
Read the meter measurement mode.
MEAS_MODE: 0x00-current AC measurement mode
