Infinite L-com LTSUB7002-3202 User manual

Product Description
The LTSUB7002-3202 Submersible liquid level transmitter is specifically designed for monitoring hydrostatic pressure. This pressure is then
converted to a signal that corresponds to the height of the liquid above it. Being a compact device allows it to be used in applications where space
is limited. It is easy to install and provides accurate, reliable measurements regardless of the shape or size of the tanks used in industrial processes
and other industrial automation applications where liquid level monitoring is needed.
Features
•Moisture-proof, anti-condensation, anti-leakage (protection grade IP68)
•Excellent resistance to impact, overload, vibration and corrosion
•Efficient protection from lightning, electromagnetic interference with
strong anti-radio frequency
•Advanced temperature digital compensation with wide working
temperature range
•High precision and frequency response with good long-term stability
Applications
•Liquid level measurement and control in industrial processes
•Water conservancy and hydropower monitoring as well as control
•Building automation and constant pressure water supply
•Urban water supply and sewage treatment
•Liquid level measurement and control of other automation systems
TECHNICAL PARAMETERS
Reference temperature: 25°C (unless otherwise specified)
Signal
MODBUS (RS485)
Protocol
MODBUS, see appendix for details
Supply Voltage
3.3~3.6VDC, suitable for battery power supply, other power supply customization
Power Consumption
[email protected] (MAX)
Level of Accuracy
±0.5%FS
Medium Temperature
-10~+85°C (No freezing)
Media Compatibility
Various media compatible with 316L stainless steel
Degree of Protection
IP68 (Cable output)
PRODUCT DIMENSIONS CONNECTION METHOD
NOTES AND WARRANTY INFORMATION
•Follow the wiring diagram to ensure proper connections are made and use only under the specified voltage range.
•Please handle with care so as not to cause damage to both internal and external structures.
•This product is warrantied against defects in material and workmanship for a period of a year from the date of purchase.
Low Power Submersible Digital Liquid Level Sensor
Product manual for Part Numbers: LTSUB7002 - 3201/02/03/04
Note: Dimensions are in millimeters

Appendix: MODBUS communication protocol
Basic Settings of Communication Protocol
The transmission mode is MODBUS-RTU mode, and the communication parameters are shown in the table below:
Parameter
Describe
Baud Rate
9600
Start Bit
1
Data Bit
8
Stop Bit
1
Check
NONE
Note: The default baud rate is 9600bps (additional options: 4800bps, 9600bps, 19200bps, 38400bps, 57600bps, 115200bps. Can be configured
according to user requirements.)
Slave address: The factory default is 123, which can be configured according to user requirements. The universal slave address is 200 (note: if a
multi-machine communication network is formed, other slave addresses cannot be set to 200).
Holding Register List
Parameter
MODBUS holding register address (16 bits)
Real-time Pressure Value (float)
0000H, float standard: A, B, C, D
Slave Address (Address)
002FH, unsigned integer representation, Default: 123
Baud Rate
0030H, the default slave address is 9600, save it as 96 when saving, and so on
(divided by 100)
Modbus RTU Command
Supported MODBUS function codes: 0x03, 0x06.
03H function code example: read the liquid level data the slave address of which is 123.
Host query command:
Slave Address
7BH
Slave address
Function
03H
Function code
Starting Address Hi
00H
The high 8 bits of the start register address
Starting Address Lo
00H
The lower 8 bits of the start register address
No. of Registers Hi
00H
The upper 8 bits of the number of registers
No. of Registers Lo
02H
The lower 8 bits of the number of registers
CRC Check Lo
CFH
CRC check code lower 8 bits
CRC Check Hi
91H
CRC check code high 8 bits
Slave response:
Slave Address
7BH
7BH Slave address
Function
03H
03H Function code Byte Count 04H 4 bytes long
Data Hi
40H
40H At this time, the liquid level is: 2.682 meters
Data Lo
2BH
2BH
Data Hi
A5H
A5H
Data Lo
E3H
E3H
CRC Check Lo
7EH
7EH CRC check code lower 8 bits
CRC Check Hi
E5H
E5H CRC check code high 8 bits
06H function code example: modify the baud rate (in this case, modify it to 57600bps)
Host query command:
Slave Address
7BH
Slave address
Function
00H
The holding register address of the baud rate is 000BH
Starting Address Hi
30H
The holding register address of the baud rate is 000BH
Starting Address Lo
02H
When the baud rate is 57600bps, the value of the register is 0240H
Data Hi
02H
When the baud rate is 57600bps, the value of the register is 0240H
Data Lo
40H
When the baud rate is 57600bps, the value of the register is 0240H
CRC Check Lo
82H
CRC check code lower 8 bits
CRC Check Hi
CFH
CRC check code high
06H Function code

Slave response:
Slave Address
7BH
Slave address
Function
06H
Function code
Starting Address Hi
00H
The holding register address of the baud rate is 000BH
Starting Address Lo
30H
The holding register address of the baud rate is 000BH
Data Hi
02H
When the baud rate is 57600bps, the value of the register is 0240H
Data Lo
40H
When the baud rate is 57600bps, the value of the register is 0240H
CRC Check Lo
82H
CRC check code lower 8 bits
CRC Check Hi
CFH
CRC check code high 8 bits
06H function code example: modify the slave address (this example is modified to 71)
Host query command:
Slave Address
7BH
Slave address
Function
06H
Function code
Starting Address Hi
00H
Register start address high 8 bits
Starting Address Lo
2FH
The lower 8 bits of the register start address
Data Hi
00H
When the slave address is 71, the value of the register is 0047H
Data Lo
47H
When the slave address is 71, the value of the register is 0047H
CRC Check Lo
F3H
CRC check code lower 8 bits
CRC Check Hi
ABH
CRC check code high 8 bits
Slave response:
Slave Address
7BH
Slave address
Function
06H
Function code
Starting Address Hi
00H
Register start address high 8 bits
Starting Address Lo
2FH
The lower 8 bits of the register start address
Data Hi
00H
When the slave address is 71, the value of the register is 0047H
Data Lo
47H
When the slave address is 71, the value of the register is 0047H
CRC Check Lo
F3H
CRC check code lower 8 bits
CRC Check Hi
ABH
CRC check code lower 8 bits