Product Features

Wide voltage power supply (7-40V)

1-channel weighing data collection

Support RS485 isolated communication

Support standard Modbus RTU protocol

Support setting sampling and filtering frequencies

Hardware supports up to 255 device addresses

power isolation

Support 2-point calibration

Support quadratic curve fitting for correcting sensor nonlinearity

24 bit high-resolution AD

Full range 0.0003% non-linear

The filtering width and sampling period can be set

Parameters

Product Selection

Address Description

The device address consists of two parts: the dip switch address and the device base address.

Dial switch address: It is a five digit dial switch address. (Range 0~31)

Device base address: refers to the address set by software, also known as offset address.

The specific relationship is:

Device address=dip switch address+device base address (without dip switch device: device address=device base address).

1. When all five dialing codes are dialed to the "ON" position, it is the address "31";

2. When all five dialing codes are dialed to the "OFF" position, it is the address "0";

3. The leftmost 1 is the binary lowest bit.

4. Address Table:

interface definition

Schematic diagram of 485 cascade connection for multiple modules

Register Description

This weighing sensor is mainly a coil register, which mainly supports the following instruction codes:

remarks:

① Modbus device commands support the following Modbus addresses:

00001 to 09999 are discrete outputs (coils)

10001 to 19999 are discrete inputs (contacts)

30001 to 39999 are input registers (usually analog inputs)

40001 to 49999 are reserved registers

Using a 5-digit code format, the first character determines the register type, and the remaining 4 characters represent the address. Address 1 starts from 0, such as 00001 corresponding to 0000.

② Table of baud rate values correspondence

Calibration:

Open the "JYHgs. exe" software and use the calibration function for calibration. Please refer to the software instructions for details.

Example of Communication Instructions

Weighing inquiry:

Query the first weighing method

FE040000000125C5

Simulated return information:

FE 04 02 00 00 AD 24

Common fault analysis:

1. The power on indicator light is on, but the upper computer software cannot connect to the module:

When encountering this problem, the following key points are usually checked:

Is the connection of 485 communication lines A and B correct

Are the parameters such as serial port baud rate, stop bit, and verification method correct

Is the address of the device dip switch consistent with the address set by the upper computer software

485 wiring length without added shielding wire

2. The AD character is fixed to a certain large value, which does not change with the sensor

Sensor connection error

The sensor is damaged

3. The AD character fluctuates greatly and cannot be calibrated or measured

Low module power supply voltage or large ripple

Poor wiring of the sensor

The sensor wiring is long and not shielded

The sensor load is unstable

Installation size: