Xinyu Electronic Technology Co., Ltd., Shizilou North Road, Shizilou Street, Yanggu County, Shandong Province

User Manual for Thermistor Temperature Collection Module

XY885-AIR6

Brief introduction

measure6roadThermistor temperatureSignal, throughRS485Interface output.thermal resistanceSignal input and working power supplyRS485Isolation between them.RS485Communication adopts standardsmodbus-rtuProtocol, compatible with various configuration software,PLCTouch screen networking. leave the factoryPresetsRS485Communication parameters: module address1, baud rate9600，8One data bit, no checksum,1Stop position, users can modify communication parameters through the upper computer parameter setting software.

2、 Main technical indicators

model	XY885-AIR6
Input signal	6Road heating resistor temperature, supportsPt100,Cu50Index mark, with wire breakage and short circuit detection, Support three wire sensor connection and two wire sensor connection
measurement accuracy	0.2%
measuring range	Pt100:-200~600℃;Cu50:-50~150℃
Input isolation	Input signal and working power supplyRS485Isolation between outputs, isolation voltage≥1500VDC
Sampling rate	12order/In seconds,6Channel cycle measurement
communication interface	RS485
communication protocol	Modbus-rtu
Baud rate	2400,4800,9600,19200,38400,57600,115200
Parity bit	No verification, odd verification, even verification
Power communication indicator light	After power on, the indicator light stays on and flashes once upon receiving a command frame
Working power supply	DC9-36V
Installation method	35mmDIN-Rail Mounting
External dimensions	131X72X27mm

IIIRS485communication

3．1 RS485communication

Communication baud rate:2400、4800、9600、19200、38400、57600、115200, factory preset values9600；Parity bits: no parity, odd parity, even parity, factory default value without parity；8One data bit. standardmodbus-rtuProtocol, Instrument Address:1~247, factory preset values1Communication baud rate,The parity bit and communication address are set through the upper computer parameter setting software.

support03H、04HRead command,03H、04HThe function of reading commands is the same;06H、10HWrite commands.

Message format description:

command03H(perhaps04H): Read command

Host request: address+command+data address+Length+ CRCCheck Code

1byte + 1byte + 2byte + 2byte + 2byte

Address: For the module address to be queried, it can be found at1~247Internal settings, occupying 1One byte

Command:03H(perhaps04H)Read command, length is 1One byte

Data address: The starting address of the read data, occupying 2One byte

Data length: The length of the read data word

CRC16Verification code: Low8Located in the front, high8Located at the back, occupying2One byte

Module response:address+command+Length+Data information+ CRCCheck Code

1byte + 1byte + 1byte + nbyte + 2byte

Address: In response to the instrument address code, the length is 1One byte

Command:03H(perhaps04H)The length is 1One byte

Data length: The byte length of the read data

Data information: Read data

CRC16Verification code: occupied2One byte, low8Located in the front, high8Located at the back

3．2 Example of Communication Messages

Read data register(function code03H/04H): Read out6Measurement value of road resistance,1~6The road temperature values are-25.6℃、0℃、36.7℃、45.0℃、100.0℃、150.3℃The instrument address is1.

Host reads data frames(Data to16Binary format representation)：

address	command	start address(MSB first)	Number of registers(MSB first)	Check Code(Little Endian)
01	03	00,00	00,06	C5,C8

Module responds to data frames(Data to16Binary format representation)：

address	command	Length	data segment(16byte)	Check Code
01	03	0C	FF,00,00,00,01,6F,01,C2,03,05,DF,E0	AB,52

3．3 ModbusCommunication Register Address Table

address	Project Description	data type	describe
0	auxiliary word for ordinal numbers1Temperature of road heating resistor	short	Signed integer, high-order, read value/10, which is the actual temperature value, unit:℃. When the read temperature value is greater than the measurement range of the thermistor, it indicates that there is no thermistor input or that the circuit is in a disconnected state; When the read temperature value is less than the measurement range of the thermistor, it indicates that the thermistor input of this circuit is in a short circuit state.
1	auxiliary word for ordinal numbers2Temperature of road heating resistor	short
2	auxiliary word for ordinal numbers3Temperature of road heating resistor	short
3	auxiliary word for ordinal numbers4Temperature of road heating resistor	short
4	auxiliary word for ordinal numbers5Temperature of road heating resistor	short
5	auxiliary word for ordinal numbers6Temperature of road heating resistor	short
6~7	auxiliary word for ordinal numbers1Temperature of road heating resistor	float	floatThe temperature value represented by a number, unit:℃.floatFloating point numbers are usedIEEE754Format, symbol bit1position(S), index level8position(E), Last digit23position(F)，S EEEEEEEE FFFFFFFFFFFFFFFFFFFFFFF(31->0). Symbol bit: Positive number is0The negative number is1Finger offset127The last digit represents the addition of decimals1It is represented as((-1)^S) * 2^(E-127) * (1+F/0x7fffff)High position ahead.
8~9	auxiliary word for ordinal numbers2Temperature of road heating resistor	float
10~11	auxiliary word for ordinal numbers3Temperature of road heating resistor	float
12~13	auxiliary word for ordinal numbers4Temperature of road heating resistor	float
14~15	auxiliary word for ordinal numbers5Temperature of road heating resistor	float
16~17	auxiliary word for ordinal numbers6Temperature of road heating resistor	float
100	Thermal resistance index number	short	0 Pt100; 1: Cu50