Haiwell PLC User Manual & Application Case

www.haiwell.com Haiwell PLC - Analog Module Application Case
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After setting, select the "parameter download" to download the parameter into the module.
In addition, we can do the following operations through the remote module tool:
 Online monitoring the channel value of module, error code.
 Upload the module paramater, upgrade the module firmware, then make the module support new features.
 It can export the module configuration to save or import and restore the default value.
2.6. Remote IO application example(RS485 mode): The PLC read the 4 communication temperature values of S04AI module
1
Hardware wiring: PLC connects to 485 port of module by shielded twisted pair, A + connects to A +, B- connects to B-, if
the PLC connects to multiple remote IO modules, it needs to use Hand in hand way to connect.
2
Modbus address: From the above 4-channel analog CR parameter table shows that, the channel 1 ~ 4 input values are
stored in 10H ~ 13H of S04AI module.
3
PLC program: Host PLC wants to read the 4-channel liquid level values of remote IO module S04AI, 0 ~ 1000 indicates
that 0 ~ 1.0m. In this example, S04AI communication is the default parameter: Station number address is 1, baud rate is
19200, data format is N 8 2 RTU. The program of PLC reads the 4-channel liquid level values is as follows:
The host PLC reads the 4-channel liquid level values of S04AI by Modbus read instruction MODR, the start address is
10H (hexadecimal), that is, the decimal value is 16. When the communication is successful, M0 is ON, the liquid level
values which are read back will be stored in V0-3, V0=235, indicating that the actual temperature of the first channel is
0.235m, the same as V3=867, indicating that the actual temperature of the fourth channel is 0.867m.
2.7. Remote IO application example (RS485 mode): The PLC writes the 8-channel output values of S08AO module
1
Hardware wiring: PLC connects to 485 port of module by shielded twisted pair, A + connects to A +, B- connects to B-, if
the PLC connects to multiple remote IO modules, it needs to use Hand in hand way to connect.
2
Modbus address: From the above 8-channel analog CR parameter table shows that, the channel 1 ~ 8 output values of
S08AO module are stored in address 10H~17H .
3
PLC program: Host PLC wants to write the 8-channel analog output values of remote IO module S08AO. In this example,
S08AO communication parameters: Station number address is 2 (set by DIP switch), baud rate 19200, data format N 8 2
RTU. The program of writing 8-channel analog output values is as follows:

Haiwell PLC Specifications

General

Series	Haiwell PLC
Programming Language	Function Block Diagram
Communication Ports	RS232, RS485, Ethernet
Digital Inputs	Varies by model (e.g., 8, 16, 32)
Digital Outputs	Varies depending on the model (e.g., 8, 16)
Analog Inputs	Varies by model (e.g., 4, 8)
Analog Outputs	Varies by model (e.g., 2, 4)
Power Supply	24V DC
Real-Time Clock (RTC)	Yes
Expansion Modules	Yes, supports various expansion modules for I/O, communication, and special functions
Input Voltage	24V DC
Data Memory	Varies depending on the model
Humidity Range	5% to 95% (non-condensing)