1Product Features

lDC7-30VWide voltage power supply；

lRS485Communication isolation；

lRS232Communication;

lCommunication interface supportRS232、RS485；

lstandardmodbusProtocol, while also supportingRTU、TCP、ASCIIformat；

lCan be set0-255Device address, set through software.

IIPRODUCT FUNCTION

l12roadPT100Temperature acquisition channel,24positionADtransformation;

lTemperature acquisition resolution0.01℃；

lTemperature acquisition accuracy±0.1℃；

l12road12Bit resolution analog quantity4-20maperhaps0-10vinput；

lAccuracy of analog quantity acquisition±0.01ma/v；

lSupporting baud rate:2400,4800,9600,19200,38400(Can be modified through software, default)9600）.

IIIProduct Selection

4Parameters

5Interface Description

PT100In the three wire system, as shown in the figure,AgiveB、AgiveCThe resistance value between them is at room temperature110Around Ohm,BgiveCBetween them is0Oh. Oh.

1Pin Description

2Size

6、 Communication instructions

1、RS232Wiring diagram

2、RS485wire connectionpicture

The serial port that comes with a computer is usuallyRS232It needs to be equipped232-485Converter (recommended for industrial environments to use active band isolated converters), after conversionRS485doA、BTwo lines,AConnect to the boardATerminal,BConnect to the boardBTerminal,485Shielding can be connectedPBIf there are many devices, it is recommended to use twisted pair shielded wires and adopt a chain network structure.

7、 Hardware wiring

1、PT100Sensor wiring

2、Analog wiring diagram

Collected by devicesThe relationship between AI data and actual input values:

actualprice=returnprice*0.001（ma/v）

8Test software description

1、Software Download

Software download link address:http://www.juyingele.com.cn/software/software/JYDAMdebugging software.rar

2、softwaredescribe

For detailed usage instructions, please refer to:JYDAMDebugging software user manual

9、 Communication parameters

1Address Description

2Modify device address

ØAddress of dip switch

uAll five dialing codes have been dialedWhen in the "ON" position, it is the address "31”；

uAll five dialing codes have been dialedWhen in the "OFF" position, it is the address“1”；

ufar left1 is the lowest binary bit.

uAddress Table:

ØOffset Address

The default offset address is0. Set up through software:

3Baud rate

ØPower on the device again;

Use the modified baud rate for communication testing.

10Temperature compensation explanation

Compensation software download address:http://www.juyingele.com.cn/software/software/Temperature compensation software.rar

PT100Sensors are resistance signals, and the line loss values of sensors of different lengths vary. Line loss compensation needs to be carried out according to the different lengths of sensor cables;

Corresponding relationship between line loss value and temperature: 380milliohms= 1℃；

For example:

① TheThe current collected temperature value is29.91℃, the actual temperature value is28.91℃. The temperature value that needs to be compensated is-1℃，

The compensation value written380/10=38The specific compensation interface screenshot is shown in the following figure:

② TheThe current collected temperature value is30.05℃, the actual temperature value is33.05℃. The temperature value that needs to be compensated is3℃, the compensation value written is-3×（380/10）=-114The specific compensation interface screenshot is shown in the following figure:

11、 Development documentation description

1、communicationProtocol Specification

This product supports standardsmodbusInstructions, for detailed instruction generation and parsing methods, please refer to the register table in this article for reference《MODBUSThe Chinese version of the agreement is sufficient.

ModbusChinese reference for the agreement:

http://www.juyingele.com.cn/software/software/Modbus%20POLLSoftware and User Manual.rar

2、ModbusRegister Description

Coil register address table:

Table of Baud Rate Values

Attention: Use a third-party host computer, such as KingviewMCGS、PLCWhen waiting for the software,PLCRegister addresses will be offset1.

3Instruction generation instructions

useJYDAMDebugging software can generate query channel instructions

4Command List

5Detailed Explanation of Instructions

5.1、temperaturequery

The relationship between the obtained temperature data and the actual input value is: actual value=return value*0.1

Query the temperature of the first channel

FE040000000125C5

Simulated return information:

FE 04 0209 92 2A D9

query12temperature

FE040000000CE400

Simulated return information:

FE 041800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0081 60

5.2Analog quantity query

The relationship between the obtained analog data and the actual input value is: actual value=return value*0.001

Query analog quantityAD character

Send code:FE 04 001400 0C A4 04

Simulated return information:

Return code:FE04 1800 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 81 60

TwelveCommon problems and solutions

1、Use the relay board after power supply232The interface cannot establish communication and cannot be controlled

Firstly, test whether different baud rates can be controlled,485Interface AttentionA+、B-Shielded wires are not necessary, but they must be connected in situations with high communication error rates, even if the distance is very close.

2、485Bus, mounted greater than1I have a device with a broadcast address255transmiting relay1Absorb, but not all modules' relays1Suck and.

The broadcast address can be used when there is only one device on the bus, greater than1Please use dip switches to distinguish addresses when controlling individual devices, otherwise instructions may not be executed correctly due to asynchronous judgment of communication data by the module.

3、SiemensPLCUnable to communicate properly with the device

Siemens485busABDefinition opposite to equipment.

tenthreeTechnical support contact information

contact number:010-82899827、010-82899821

contactQQ：3323725294