Analog Output (Ao) - Ebyte E150-400T30S User Manual

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For example, 2: read the current integer voltage value (power supply voltage) of ADC3)
01
Device MODBUS Function
address code
Note:
the CRC check code of the last two bytes of the sending instruction needs to be calculated by the
user.
Serial port sending: 01 04 00 66 00 01 D1 D5
Remote wireless transmission: 01 04 00 66 00 01 D1 D5
After sending the above command to the device via serial port or wireless, the device will return the
following values to the serial port or wireless:
01
Device MODBUS Function
address code
Phenomenon: return the value of power supply voltage 4.528V (11B6 H) (floating point value * 1000).
Serial port sending: 01 04 02 11 B6 34 D6
Remote wireless transmission: 01 04 02 11 B6 34 D6

8.4 analog output (AO)


E150-400T30S has two analog output pins (AO)

AO output voltage is controlled by floating-point number, with built-in voltage stabilization algorithm.
The maximum output voltage is the power supply voltage

When writing floating-point numbers, two MODBUS registers must be written continuously
Register function
Dac1 output voltage floating point value
Dac2 output voltage floating point value
 Command to write multiple holding registers using 10 function code
For example, set the output voltage value of dac1 to 1.2V
01 10
Function
D
evice MODBUS
code
address
Note:
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04 00 66
Register head
address
04 02
Number of
bytes of data
00 00 00 02
Register
Number of
head
registers
addres
s
00 01
Number of
registers read
11 B6
Returned data
MODBUS address
0x0000
0x0002
04 3F 99 99 9A
Number of
Data written
bytes written
E150-400T30S user manual
D1 D5
CRC check
code
34 D6
CRC check
code
C5 AF
CRC check code
29