GPRS RTU

Introduction:

RTU INDUSTRIAL CONTROL COLLECTOR IS m RTU IND y company after years of technical practice and engineering application, in order to meet the market demand and developed a set of wireless GPRS communication and data acquisition as one of the terminal products. This product can collect multi-channel analog quantity, switch quantity, data acquisition speed is fast, high precision. Products to Unicom or mobile GPRS as the communication platform to complete the transmission of data collection, such a communication mode will not be restricted by geography, stability, reliability, low cost advantages. All data parameters can be queried or set through the upper computer software.

Technical specifications:

1. Supply voltage: DC12V;

2. Communication mode: GPRS;

3. Input current: instantaneous maximum value <300mA, average current < 120mA;

4. Rated power: average less than 5W;

5. ARM microcontroller chip with low power consumption;

6. Industrial customized LCD with more display functions;

7. Size: 210*255*92mm;

8. Working environment temperature: -25~+70 degrees Celsius;

9. Storage temperature: -40~+85 degrees Celsius;

10. Relative humidity: 96%.

Functions:

1. The product provides a variety of input and output interface resources;

A. 6 single-ended analog input interfaces, DC 0-20mA/4-20mA, input accuracy is ±0.02mA;

B. 4 active low-level switch input interfaces, the input type can be controlled by software;

C.4 channel pulse output interface, NPN transistor collector open-circuit output, 500mA;

D. Solar power, energy saving and environmental protection; Can also use DC12V regulated power supply;

2. The system uses mobile or Unicom GPRS communication platform, with no geographical restrictions, stability, reliability, low cost advantages, and the data transmission speed is fast, stable signal;

3. Can be timed to save the data, the time interval can be set by the upper computer (in minutes for setting units), can save a long period of historical data, users can query each historical data through the upper computer;

4. Supports UDP and TCP communication.

5. With LCD display and button selection function, the user can select different domain names for network connection through button setting and LCD display;

6. All functions and data of the product can be queried or set through the upper computer software

7. View function: check RTU online status, interference status, etc.

The interface definition:

AVcc external power input positive end

AGnd external power input end

AI_1+ Channel 1 analog input positive end

AI_2+ Channel 2 analog input positive end

AI_3+ Channel 3 analog input positive end

AI_4+ Input positive end of the fourth analog quantity

AI_5+ Channel 5 Analog input positive end

AI_6+ Channel 6 analog input positive end

Gnd Signal ground, connected to the negative end of analog input

Gnd Signal ground, connected to the negative end of analog input

DI_01 Input number 1

DI_02 Input number 2

DI_03 Input number 3

DI_04 Indicates the fourth digit input

DO_01 Route 1 digital output

DO_02 Channel 2 Digital output

DO_03 Channel 3 Digital output

DO_04 Channel 4 Digital output

485A RS485 signal A+

485B RS485 signal B-

Communications specification:

1. Communication parameter description (factory value) : 9600, N, 8,1

Parameters that

9600 baud rate

N(none) Indicates the parity bit

Eight data bits

1. Stop bit

2. Analog input signal acquisition command:

Send: 01 03 00 00 00 06 C5 C8 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

03 1 Function Code 03- Read register

0000 2 Register address (type 4X) 0000- Analog input start register address

0006 2 Read Length 0006- Read six registers

C5C8 2 CRC Check code CRC check code of all previous data

Receiving: 01 03 0C 07 69 00 00 00 00 00 00 00 00 00 00 00 00 00 00 B6 26 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

03 1 Function Code 03- Read register

0C 1 Number of bytes 0C- Reads 12 bytes

0769 12 Read Data 0769- Read analog input channel 1 data

0000

0000

0000

0000

0000

0000- Read analog input channel 2 data

0000- Read analog input channel 3 data

0000- Read analog input channel 4 data

0000- Read analog input channel 5 data

0000- Read analog input channel 6 data

B626 2 CRC Check code CRC check code of all preceding data

Analog quantity The current data of input channel 1 is "0769", which is converted into a decimal number of 1897, and then substituted into the calculation formula:

I=(DATA*20)/4095=(1897*20)/4095≈9.26mA, the current DATA of other channels is 0mA

3. Digital input signal acquisition command:

Send: 01 02 00 00 00 04 79 C9 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

02 1 Function code 02- Read the input bit

0000 2 Input address (1x type) 0000- Start address of the input bit

0004 2 Read input bits Length 0004- Read four input bits

79C9 2 CRC Check code CRC check code for all previous data

Receiving: 01 02 01 05 61 8B (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

02 1 Function code 02- Read the input bit

01 1 Number of bytes 01- Read the length of one byte

05 1 Read Data 05- Read the input bit status

618B 2 CRC Check code CRC check code for all previous data

The read data "05" is converted into a binary number as "0000 1001". The last four digits are valid and correspond to the four digital input signals DI_04-DI_01 from left to right

Is displayed, that is, DI_04 and DI_01 have input, but other channels have no input

4. Digital output signal control command (multiple control) :

Send: 01 0F 00 00 00 04 01 03 7E 97 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

0F 1 Function code 0F- Write multiple coils

0000 2 Coil address (type 0X) 0000- Coil starting address

0004 2 Write coil length 0004- Write 4 coils

01 1 Write data byte 01- Write one byte of data

03 1 Write data 03- Write the output state of 4 coils

7E97 2 CRC Check code CRC check code of all previous data

Receiving: 01 0F 00 00 00 04 54 08 (example/hexadecimal)

The written data "03" is converted into a binary number "0000 0011". The last four digits are valid. From left to right, they correspond to the four digital output signals DO_04-DO_01

", that is, DO_02 and DO_01 have output, and other channels have no output. After receiving the correct command, the module will make corresponding actions according to the command, and will reply to indicate

Order to send back to the mainframe, indicating successful communication.

5. Digital output signal control command (single control) :

Send: 01 05 00 00 FF 00 8C 3A (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

05 1 Function code 05- Write a single coil

0000 2 Coil address (type 0X) 0000- digital output (DO_01) coil address

0001- Digital output (DO_02) coil address

0002- Address of the digital output (DO_03) coil

0003- Digital output (DO_04) coil address

FF00 2 Write data FF00- coil open, 0000- coil closed

8C3A 2 CRC Check code CRC check code of all previous data

Received: 01 05 00 00 FF 00 8C 3A (example/hexadecimal)

After receiving the correct command, the module makes corresponding actions according to the command, and sends the reply instruction back to the host, indicating that the communication is successful

6. Digital output status collection command:

Send: 01 01 00 00 00 04 3D C9 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

01 1 Function code 01- Read the coil status

0000 2 Coil address (type 0X) 0000- Coil starting address

0004 2 Read coil length 0004- Read four coil states

3DC9 2 CRC Check code CRC check code of all previous data

Receiver: 01 01 03 E0 50 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

01 1 Function code 01- Read the coil status

01 1 Number of bytes 01- Read the length of one byte

03 1 Read Data 03- Read coil status

E050 2 CRC Check Code CRC check code of all previous data

The read data "03" is converted into a binary number "0000 0011". The last four digits are valid, which correspond to the four digital output signals DO_04-DO_01 from left to right

Is displayed, that is, DO_02 and DO_01 have output, but other channels have no output.

7. Module address setting command:

Send: 00 06 00 64 00 01 08 04 (example/hexadecimal)

Data Byte Data Description Remarks

00 1 Module address 00- Group address

06 1 Function code 06- Write single register

0064 2 Register address (type 4X) 0064- Change module address

0001 2 Write data to set the new address of the module. The value ranges from 0001 to 00FE

0804 2 CRC Check Code CRC check code of all previous data

Received: 00 06 00 64 00 01 08 04 (example/hexadecimal)

This command sends a command to a module to set the new address of the module to 01. The setting can be saved when power is lost. The default address of the module is 01 when much is needed

When the modules are networked, the address of each module can be set separately. Because the group address is used, only one address can be set in the 485 network

Module, otherwise, the address of all modules in the 485 network will be set to the same address, please use this directive with caution; When the module receives the correct command, the root

Make the corresponding action according to the command, and send the reply instruction back to the host, indicating that the communication is successful.

8. Communication parameter setting command:

Send: 01 06 00 65 00 02 18 14 (example/hexadecimal)

Data Byte Data Description Remarks

01 1 Module address The address range is 01-FE

06 1 Function code 06- Write single register

0065 2 Register address (type 4X) 0065- Modify communication parameters

0002 2 write data 0001- sets communication parameters 4800,N(no check),8,1

0002- sets communication parameters 9600,N(no check),8,1

0003- set communication parameters 19200,N(no check),8,1

0004- set communication parameters 38400,N(no check),8,1

0005- set communication parameters 4800,E(even check),8,1

0006- set communication parameters 9600,E(even check),8,1

0007- set communication parameters 19200,E(parity check),8,1

0008- set communication parameters 38400,E(parity),8,1

1814 2 CRC Check code CRC check code for all preceding data

Receive: 01 06 00 65 00 02 18 14 (example/hexadecimal)

This command means to issue a command to a module, set the module's communication parameters to '9600,N(no check),8,1', the setting can be saved when power is lost; The module

The default communication parameters are '9600,N(no verification),8,1'. After setting the new communication parameters, select the correct communication parameters in the communication Settings and restart the communication terminal

Please use this instruction with caution. Generally, the set baud rate is low, the transmission speed is slow, the transmission stability is high, the set baud rate is high, the transmission speed is fast

Low transmission stability; When the module receives the correct command, it makes corresponding actions according to the command, and sends the reply instruction back to the host, indicating that the communication is successful.

Communication Indicator Description:

After the module is powered on, the communication indicator turns green

The communication indicator blinks during module communication

The module receives the correct command, and the communication indicator turns green

The module receives an incorrect instruction or an instruction other than the module's address, and the communication indicator turns red

Upper computer debugging instructions

This module provides a debugging software to realize the function debugging and parameter setting of the module. Please follow the following steps:

Connect a computer to a module using an RS485 converter

Connect the 12V or 24V external power supply to the module and power it on. To avoid unnecessary damage, check that the positive and negative ends of the power supply are correctly connected before powering on the module

Open the debugging software, select the corresponding module model, and enter the function debugging or parameter setting screen

Sets the correct communication parameters and opens a communication port

Select the appropriate setup, capture, and control options