19
Read instruction mode
The communication protocol adopts MODBUS (RTU) protocol. The content and address of the
communication can be changed according to the needs of customers.
The default configuration is network address 01, baud rate 9600, even check, one stop bit, users
can set their own changes;
Function code 0x04: This function enables the host to obtain real-time measurements from slaves,
which are specified as single-precision floating-point type (i.e. occupying two consecutive register
addresses), and to mark the corresponding parameters with different register addresses.
Communication address is as follows:
0000-0001: Temperature value
0002-0003: Main Measured Value
0004-0005: Temperature and Voltage Value
0006-0007: Main Voltage Value
Communication examples:
Examples of function code 04 instructions:
Communication address = 1, temperature = 20.0, ion value = 10.0, temperature voltage =
100.0, ion voltage = 200.0
Host Send: 01 04 00 00 08 F1 CC
Slave Response: 01 04 10 00 41 A0 00 41 20 00 42 C8 00 43 48 81 E8
Note:
[01] Represents the instrument communication address;
[04] Represents function code 04;
[10] represents 10H (16) byte data;
[00 00 00 41 A0] = 20.0; / temperature value
[00 00 4120]= 10.0; // Main Measured Value
[00 00 42 C8] = 100.0; / / Temperature and Voltage Value
[00 00 43 48] = 200.0; / / Main measured voltage value
[81 E8] represents CRC16 check code;
Instrument installation: embedded installation
Installation completion diagram
Installation completion diagram
Install fixing bracket for instrument
Insert into the cut-out hole
a. Install fixing bracket for instrument
b.Wall screw fixing
Instrument installation:Wall mounted installation
D+ D-
B2
L N
RELAY A
RELAY B
RELAY C
Install fixed bracket top view,
pay attention to
4
6x15 mm
150.3 mm
58.1 mm
