Inhand 485 Light Temperature and Humidity Transmitter Instruction Manual

Inhand 485 Light Temperature and Humidity Transmitter

product description

product description
It is a high-precision photosensitive transmitter, the output value measurement unit is Lux, the device adopts a wall-mounted waterproof shell, wall-mounted installation, and high protection level. 485 communication, standard ModBus-RTU communication protocol, communication address and baud rate can be set, the longest communication distance is 2000 meters, the product power supply is 10-30V wide voltage power supply, mainly used in agricultural greenhouses, flower cultivation greenhouses, agricultural fields, electronics Equipment production lines and other occasions that require light intensity monitoring.

Features

1.  High-precision illuminance detection measurement range of 0-6 million Lux, 0-20 million Lux optional.
2. 485 communication, standard ModBus-RTU communication protocol, communication address and baud rate can be set, the longest communication distance is 2000 meters
3.  Wall-mounted waterproof shell, high protection level, can be used in outdoor or harsh on-site environment
4. 10-30V DC wide voltage power supply

Main Specifications

DC power supply

(default)

| 10-30VDC
---|---
Maximum power consumption| 0.4W

Accuracy

| humidity| ±3%RH(5%RH~95%RH,25℃)
temperature| ±0.5℃（25℃）
Light intensity| ±7% (25℃)
Light intensity range| 0-65535Lux；0-200000Lux
Temperature and

humidity range

| -40℃~+60℃，0%RH~80%RH
Long-term stability| temperature| ≤0.1℃/y
humidity| ≤1%/y
Light intensity| ≤5%/y

Response time

| temperature| ≤18s (1m/s Wind speed)
humidity| ≤6s (1m/s Wind speed)
Light intensity| 0.1s

product model

GZWS-

| | Light intensity, temperature and humidity three in one transmission, sensor
| | N01-| | RS485 (M0dbus protocol)
| | | 2-| | Wall-mounted king character shell
| | | | 65535| Range 0-65535
| | | | 200000| Range 0-20W

System framework diagram

2. Equipment installation instructions

Check before installation
Equipment List:

1.  1 transmitter device
2.  USB to 485 (optional)
3. Warranty card, certificate, wiring instructions, etc.

installation method

Interface Description
Wide voltage power input can be 10 ~ 30V. When connecting the 485 signal line, please note that the A / B lines cannot be reversed, and the addresses of multiple devices on the bus must not conflict.

| Thread color| Explanation
---|---|---
power supply| brown| Positive power supply (10 ~ 30V

DC)

black| Negative power supply
Communication| yellow| 485-A
blue| 485-B

485Field wiring instructions
When multiple 485 model devices are connected to the same bus, there are certain requirements for field wiring. For details, please refer to Examination data package “485 equipment field wiring manual”.

3. Configuration software installation and use

Software selection
Open the data package, select “Debug software” — “485 parameter configuration software”, find “485 parameter configuration tool”
Just open it.

parameter settings

1.  select the correct COM port (“COM”-“Properties-Device Manager-Port” to view the COM port), the following figure lists the driver names of several different 485 converters.

2.  only connect one device and power on, click the test baud rate of the software, the software will test the current device baud rate and address, the default baud rate is 4800bit / s, the default address is 0x01.
   

3.  Modify the address and baud rate according to the needs of use, and at the same time,
   you can query the current functional status of the device.

4.  If the test is unsuccessful, please recheck the device wiring and 485 driver installations.

4. letter of agreement

Communication basic parameters

CRC (Redundant Cyclic Code)

Baud rate| 2400bit / s, 4800bit / s, 9600 bit / s can be set, the factory default is 4800bit / s
---|---

4.2 Data frame format definition
Using Modbus-RTU communication protocol, the format is as follows:

• Time for initial structure ≥ 4 bytes
• Address code = 1 byte
• Function code = 1 byte
• Data area = N bytes
• Error check = 16-bit CRC code
• End structure ≥ 4 bytes of time
• Address code: the address of the transmitter, which is unique in the communication network (default 0x01).
• Function code: the instruction function instruction issued by the host; this transmitter only uses the function code 0x03 (read register data).
• Data area: The data area is specific communication data, pay attention to the high byte of 16bits data first!
• CRC code: two-byte check code.

Host inquiry frame structure:

address code| function code| Register start address| Register length| ****

Check digit low

| Check digit high
---|---|---|---|---|---
1byte| 1byte| 2byte| 2byte| 1byte| 1byte

Slave response frame structure:

address code| function code| Effective bytes|

Data area

| Second data area| Nth data area|

Check code

---|---|---|---|---|---|---
1byte| 1byte| 1byte| 2byte| 2byte| 2byte| 2byte

4.3 Register address

Register address| PLC or configuration

address

| content| operating
---|---|---|---
0000 H| 40001| humidity| Read only
0001 H| 40002| temperature| Read only
0002 H| 40003| Illuminance| Read only
0003 H| 40004| (Only enabled in
0~200000Lux, unit is
1Lux)
0006 H| 40007| Illuminance (0~65535 unit 1Lux 0~200000 unit

hundred Lux)

| Read only
---|---|---|---

Communication protocol example and explanation

Read the temperature and humidity value of device address 0x01

Inquiry frame

address code

|

function code

| Starting

address

|

Data length

| Check digit

low

| Check digit

high

---|---|---|---|---|---
0x01| 0x03| 0x00 0x00| 0x00 0x02| 0xC4| 0x0B

Response frame (for example, read temperature is -10.1 ℃, humidity is 65.8% RH)

address

code

| function

code

| Effective

bytes

| Humidity

value

| Temperature value| Check digit low| Check digit high
---|---|---|---|---|---|---
0x01| 0x03| 0x04| 0x02 0x92| 0xFF 0x9B| 0x5A| 0x3D

Temperature: When the temperature is lower than 0 ℃, upload in the form of complement FF9B H (Hexadecimal) = -101 => Temperature = -10.1 ℃
humidity:  292 H (hex) = 658 => humidity = 65.8% RH

Read the illuminance value at device address 0x01
(0 ~ 65535 is read in units of 1 Lux or 0 ~ 200000 is read in units of 100 Lux)

Inquiry frame

address code

| function

code

| starting

address

|

Data length

| Check digit

low

| Check digit

high

---|---|---|---|---|---
0x01| 0x03| 0x00 0x06| 0x00 0x01| 0x64| 0x0B

Acknowledge frame (for example, read the illuminance of 30000 Lux)

address

code

| function

code

| Returns the numb er of valid bytes|

Data area

| Check digit

low

| Check digit

high

---|---|---|---|---|---
0x01| 0x03| 0x02| 0x05 0x30| 0xBB| 0x00

Illumination calculation instructions:

1.  The product is a 0~65535 range transmitter, the unit is 1Lux 0530 H (hexadecimal) = 1328 => illuminance = 1328 Lux
2. The product is a 0~200000 range transmitter, the unit is 100 Lux
   0530 H (hexadecimal) = 1328 => illuminance = 132800 Lux

Read the illuminance value of the device address 0x01 (0 ~ 200000 is read in units of 1 Lux)
Inquiry frame

address code

| function cod e| starting

address

|

Data length

| Check digit lo w| Check digit hi gh
---|---|---|---|---|---
0x01| 0x03| 0x00 0x02| 0x00 0x02| 0x65| 0xCB

Acknowledge frame (for example, read the illumination of 200,000 Lux)

address c ode| function co de| Effective byte s| High illumin ation| Low illumin ation| Check digit low| Check digit high
---|---|---|---|---|---|---
0x01| 0x03| 0x04| 0x00 0x03| 0x0D 0x40| 0x0F| 0x53

Illumination calculation instructions:
This protocol is only used under 0 ~ 200000Lux range transmitter, the unit is 1Lux
30D40 H (Hexadecimal) = 200000 => Illumination = 200000 Lux

Read the temperature, humidity and illuminance value of the device address 0x01 (0~65535 are read in units of 1Lux)
Inquiry frame

address code

|

function code

| starting

address

|

Data length

| Check digit

low

| Check digit

high

---|---|---|---|---|---
0x01| 0x03| 0x00 0x00| 0x00 0x07| 0x04| 0x08

Reply frame

addre ss code| functio n code| Numb er of bytes| Humidi ty value| Temperatu re value| 000

2

| 000

3

| 000

4

| 000

5

| illu min atio n| Che ck cod e low

bit

| High bit of chec k

code

---|---|---|---|---|---|---|---|---|---|---|---
0x01| 0x03| 0x0E| 0x01

0x7E

| 0x00

0xE7

| Inv alid data| Inv alid data| Inv alid data| Inv alid data| 0x8 5

0x1

F

| 0xB 3| 0X4 D

humidity
17E H (hexadecimal) = 382 => humidity = 38.2%RH
temperature
0E7 H(hexadecimal)=231=> temperature = 23.1℃
illumination
851F H(Hexadecimal)=34079=> Illumination=34079Lux (0~200000 is read in units of 1Lux and hundreds of Lux)

Interrogation frame

address code| unction code| initial address| Data length| Check     code low bit| High bit of check code
---|---|---|---|---|---
0x01| 0x03| 0x00 0x00| 0x00 0x07| 0x04| 0x08

Reply frame

addre ss code| functi on code| Num ber of bytes| Humid ity value| Tempera ture value| Hi gh lig ht| Lo w lig ht| 0004| 0005| illuminat ion Hundred Lux| Che ck code low bit| Hig h bit of che ck cod

e

---|---|---|---|---|---|---|---|---|---|---|---
0x01| 0x03| 0x0E| 0x01

0x7E

| 0x00

0xE7

| 0x 00

0x

00

| 0x8 5

0x1

F

| Inval id data| Inval id data| 0x01

0x54

| 0x2 D| 0x2 C

humidity
017E H (hexadecimal) = 382 => humidity = 38.2%RH
temperature
00E7 H(hexadecimal)=231=> temperature = 23.1℃
illumination
0000 851F H(Hexadecimal)=34079 => Illumination =34079Lux
Light (100 Lux)
0154H (hexadecimal) = 340 => light = 340 hundred Lux = 34000 Lux

Read the temperature, humidity and illuminance value of device address 0x01(0 ~ 200000 is read in 1 Lux unit)

address code

| ****

function code

| starting

address

| ****

Data length

| Check digit lo w| Check digit hi gh
---|---|---|---|---|---
0x01| 0x03| 0x00 0x00| 0x00 0x04| 0x44| 0x09

Reply frame

address code| function code| Bytes| Humidity

value

| Temperatur e value| High light|

Low light

| Check cod e
---|---|---|---|---|---|---|---
0x01| 0x03| 0x08| 0x02 0x92| 0x80 0x65| 0x00 0x03| 0x0D 0x40| 0x01 0x6F

Common problems and solutions

Device cannot be connected to PLC or computer
possible reason :

1. The computer has multiple COM ports, and the selected port is incorrect.
2. The device address is wrong, or there are devices with duplicate addresses (the factory default is all 1).
3. Baud rate, check mode, data bit, stop bit error.
4.  The host’s polling interval and waiting time for answering are too short, and both need to be set  above 200ms.
5.  The 485 bus is disconnected, or the A and B lines are reversed.
6.  If the number of devices is too large or the wiring is too long, power should be supplied nearby, and a 485 booster should be added, and 120Ω terminal resistance should be added at the same time.
7.  The USB to 485 driver is not installed or damaged.
8. The equipment is damaged.

Appendix: Shell dimensions

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