User manual for wireless temperature measurement system WLTP300 from Leelen

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Xiamen Leelen High Voltage Electric Co.,Ltd
User manual for wireless temperature measurement system WLTP300
User manual for wireless temperature measurement system WLTP300
1. Introduction for WLTP300....................................................................................................................1
2. Specification.........................................................................................................................................1
3. Description for type choosing.......................................................................................................................... 2
4. Function...............................................................................................................................................................2
4.1 Technical parameters...............................................................................................................................2
4.2 Using conditions....................................................................................................................................... 2
4.3 Main function for host and module........................................................................................................ 2
4.4 Function for displaying and pressing button........................................................................................ 2
4.5 Function for setting parameters............................................................................................................. 3
4.6 Function for communication................................................................................................................... 3
5. Operating guidance for host (main controller)WLTP300M..........................................................................3
5.1 Description of terminal connection........................................................................................................ 3
5.2 Host (main controller) Dimension.......................................................................................................... 4
5.3 Description of display panel....................................................................................................................4
5.4 Description of screen.............................................................................................................................5
5.4.1 Starting screen................................................................................................................................ 5
5.4.2 Temperature rotator screen...........................................................................................................5
5.4.3 Parameter-setting screen.............................................................................................................. 5
5.5 Description of alarm function..................................................................................................................7
6. Specification for Module WLTP300S..............................................................................................................7
6.1 external size and installation for module......................................................................................8
6.1.1 WLTP300SR-79、WLTP300SR-49............................................................................................8
6.1.2、 WLTP300ST35................................................................................................................................9
6.2 Pictures for modules......................................................................................................................................... 9
7. Function for Modbus communication............................................................................................................. 9
7.1 Communication format and definition of register.................................................................................9
7.2 Description of Communication Agreement.................................................................................11
7.2.1 Read alarm state variables........................................................................................................11
7.2.2 Read temperature data..............................................................................................................11
7.2.3 Read the Hosts’ parameters......................................................................................................11
7.2.4 Read the ID number of module.................................................................................................11
7.2.5 Response to Abnormalities..............................................................................................12
8. Description of on-site debugging........................................................................................................12
9. Common breakdowns and remedies of exclusion.....................................................................................12
10. Attachment....................................................................................................................................................... 12
Appendix: application cases for module WLTP300S
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User manual for wireless temperature measurement system WLTP300
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1. Introduction for WLTP300
The wireless temperature measurement system WLTP300 consists of two parts: wireless temperature measurement module (referred to as
modules, divided into various models) and wireless temperature measurement host (or wireless temperature monitoring terminal, which can be
referred to as host). Installed on the instrument panel room wireless temperature measuring host based on embedded installation; wireless
temperature measuring module is arranged in the internal spout, or buckle in copper or cable connection, through wireless communication between
temperature data. As the module and host are wireless communication, there is no insulation, leakage, creepage and other issues.
The wireless temperature measuring host is equipped with liquid crystal LCD, LED and button, which can display the temperature of all measured
points in real time. It has two functions, such as setting up relevant parameters on the spot, LED alarm, normally open and normally closed, and the
output of signals and alarms. And RS485 (optocoupler isolated) bus, Modbus protocol networking function, you can achieve all the settings on the
site parameters, real-time temperature data and alarm information. The following diagram is a typical diagram of the system:
One host can connect 16 wireless temperature measurement modules, and one remote computer can connect up to 247 main units through the
RS485.
2. Specification
Host WLTP300M wireless temperature adopts advanced power electronics technology, 2.4G wireless communication, RS485 communication,
temperature acquisition, LCD display, alarm and other functions in one, dedicated to the switchgear, circuit breakers and other equipment of
wireless temperature measurement system. The host has the characteristics of ingenious design, convenient installation, simple operation and high
reliability. It is an important component of the wireless temperature measurement system.
Module WLTP300S adopts advanced electronic information technology, adopts modular structure design, has the following characteristics:
1. very low power consumption: module power consumption is less than 0.1W.
2. high performance CT current transformer: the CT current transformer designed by the company has the characteristics of strong electromagnetic
induction, high conversion efficiency and small heating. It provides the power guarantee for the stability of the temperature measurement module.
3. very low start-up current and high cut-off current, the temperature module in 15A ~ 4000A can work normally.
4. high temperature design, theentire module from electronic components to shell, fittings are using high temperature material, to ensure that
modules in the 115 ℃ of high temperature environment can work properly and steadily.
5. high reliability: the temperature measurement module adopts electronic structure design and industrial level, to ensure the long-term reliability of
equipment; in the design, but also give full consideration to the complexity of EMC problem and the working environment of the equipment and
effective treatment, to ensure that the equipment can run stably in harsh operating conditions.
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User manual for wireless temperature measurement system WLTP300
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3. Description for type choosing
When you place an order for WLTP300, please kindly provide us with below:
1. installation site for module, such as: fixed contact, or copper busbar, or cable
2.spout internal diameter, fixed contact diameter where module will be installed (or copper busbar cross-section’s size), such as: fixed contact Φ
49mm, spout Φ132mm
3.the using numbers of modules, such as: a host with 6 modules, in total 10 hosts with 60 modules.
4. switchgear No. and its corresponding current, such us: No 1.2, current630A.
4. Function
4.1 Technical parameters
4.2 Using conditions
 Air temperature: -10 ~ +85 ℃ ; relative humidity: less than 90%; no strong vibration and shock; no explosion hazard; no corrosive gas and
conductive dust.
4.3 Main function for host and module
 At most the host can gather 16 circuits 2.4G temperature from wireless temperature measurement modules and it can also gather the
environmental temperature of the installation location of the Host.
 Support 4 kinds of alarm, including breakdowns of wireless communication of temperature measurement, overhigh temperature of
temperature measuring points and too large temperature difference of the three phases of tempeature measuring points
 2 sets of independent relay alarm output
 The only ID - each module with 12 bit read-only, convenient for host recognition.
 Module can adapt automatically the work frequency of the host, which is convenient for debugging and maintenance.
 Module uses ZigBee Low-power technology, operation mode for work-sleep-work. When the input current is less than 30A, module enters into
the ultra low-power mode, it will automatically send temperature data with regular cycle, in the rest of time in a dormant state.
 In operation, the working state of the wireless communication and the temperature measuring probe is automatically identified, if abnormal,
the system can be restored to normal, which improves the reliability of module under the harsh environment of the high pressure, the high
temperature and the strong magnetic.
4.4 Function for displaying and pressing button
 It adopts screen of 16×2 Character and has two lines to show. Each line shows 16 ASCII characters and the real-time temperature,
environmental temperature and all setted parameters of every temperature measuring point.
 4 LED indicator lights to indicate the states of operation, wireless communication, alarm and power.
 4 button designs including【【Set】, 【Enter】, 【Shift up/+】、【Shift down/-】. They are used to turn over pages and modify parameters.
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User manual for wireless temperature measurement system WLTP300
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4.5 Function for setting parameters
 You can set the parameters like the address of the Host, protective temperature, alarming temperature, working frequency, communication
period and so on. You can also set the number and ID numbers of temperature measurement modules which are used to monitor.
4.6 Function for communication
 The Host fulfills its data interaction with temperature measurement modules by means of 2.4G wireless module in order to obtain the
temperature of the temperature measuring points.
 It has RS485 communication interface, so it can fulfill the on-site long-distance communication with single or several networks.The main
controller can also connect the GPRS DTU (Data Transfer unit), so that the upper computer
can achieve data remote transmission and parameter modification.
5. Operating guidance for host (main controller)WLTP300M
5.1 Description of terminal connection
PIC 5.1 Description of terminal connection
1.RS485 Communication: Foot1 and Foot2 are RS485
communication lines B and A.
2.Local Environmental Temperature: This machine already has environmental
temperature measurement inside and has no need the external temperature
sensor in general.
3.the first relay: module fault alarm output, 6, 7, 8 foot 4. second relay: abnormal temperature alarm output, 9, 10, 11 foot
5.Power line: Foot12 and Foot13: 90~264V AC /
100~370V DC input.
6. NC1 relay normally closed contact, COM1 is common end, NO1 is normally
open contact. NC's feet are empty (no need wiring).
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User manual for wireless temperature measurement system WLTP300
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5.2 Host (main controller) Dimension
The opening size is 139*45mm (because the four feet of the shell must be loaded with circlip, and the installation size is larger than the panel
size).When the wireless temperature monitoring controller is installed, only the tail is aligned with the opening hole of the switchgear, and it can be
pushed to the bottom by force.
5.3 Description of display panel
PIC 5.3 Display Panel for Main Controller
The display panel is made up of 4 indicator lights, a two-line LCD( each line shows 16 characters) and 4 buttons. The hole size is 139*45mm.
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1、 Operation Indicator Light: Normal operating instructions flash out 1 times per second; when changing frequency range, flashes 2 times
per second; when the host scans the frequency range, flashes swiftly 4 or 5 times per second until all the temperature measurement
modules are changed or scaned successfully. However, later if the module fails to communicate with the host, the host will alert that
communication fails and it will not longer scan unless the frequency range of host and module is changed.
2、 Communication Indicator Light: wireless communication guidance. When it receives the data packet of wireless temperature
measurement, the light will flash once.
3、 Alarm Indicator Light: Whenever the alarm occurs, the light will light up; when the alarm is over, the light will be off.
4、 Power Light: normally on indicates normal power supply.
5、 LCD: it has two lines of letters or numbers, marks and so on, which are shown by ASC Character, and at most each line will show 16
characters.
6、 Button: includes 【Set】, 【Enter】, 【Shift up/+】、【Shift down/-】, altogether 4 buttons. The function of each button will be introduced
on each screen.
5.4 Description of screen
5.4.1 Starting screen
PIC 5.4.1 Start screen
After we turn on the controller, the Splash screen will be shown first. One second later, it will automatically shift to the temperature rotator screen.
5.4.2 Temperature rotator screen
PIC 5.4.2 Temperature rotator screen
The screen shows the temperature of each temperature measuring point that motored by the Host. The interface shows 4 temperature measuring
points. The temperature will be shown by three-digit numbers and the unit is ℃. If the temperature is negative, it will show “–XX”. If there is no
operation on the screen for over 4 seconds, it will show the temperature of next 4 temperature measuring points.
On this screen, you can press button 【Shift up】 and 【Shift down】to shift directly the temperature of the temperature measuring points.
If there is no operation for over 30 seconds, LCD will turn off automatically. It will restart until someone presses the buttons again, which also applies
to other screens so that no repetitive description.
On the rotator screen, press the button 【Set】 and enter into the parameter-setting screen.When the Host judges that certain temperature measuring point alarms, the display value of the temperature will flash. If it fails to communicate with
some temperature measuring point, the temperature value will show “***” and flash.
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5.4.3 Parameter-setting screen
On the rotator screen, press the button 【Set】 and enter into the parameter-setting screen. First is the screen of password-confirming.
There are 4 code digits and the digit to choose will flash. Press 【+】 to plus one in this digit and press 【-】 to minus one in it. Press 【Enter】
to confirm the digit and choose next one. When it comes to the final one, Press 【Enter】 and the Host will compare the code you input with the
Host’s code to check whether they are the same. If they are the same, it will enter into the screen of Host Configuration. Otherwise, it will return to
the first code digit so that the user can input his or her password again.
The default password when the Host leaves the factory is 0000. Users can change the password on the setting sceen.
After the user inputs the password correctly, it will enter into the configuration screen. The parameters to choose will flash and you can choose
the configuration item by pressing the button 【Shift up】 and 【Shift down】. Press the button 【Enter】and you can modify this item. When in
the modification state, press 【+】 and 【-】to plus or minus the number. Press the button 【Enter】 to confirm this digit and choose the next
digit. Having modified the final digit, press 【Enter】 to set this item and exit the modification of it and choose the next configuration item. During
the modification, Press 【Set】to exit the setting of this item. The operation of the data on the screen is similar to it. No repetitive description
follows.
Below are the description of the meaning of each parameter by using the default values. On the left of “ ：” are names of parameters and on the
right of it are parameter values.
1 PassWord：**** Users can set the code to prevent the illegal entrance or misoperation, 0000~9999
2 Addr_485：099 the communication address of RS485. It is also the communication address of Modbus, 001~247.
3 Baud_485：9600 the communication Baud rate is 9600 and modification is not supported temporarily.
4 RF_Prot_Temp：115 value of RF high temperature protection valve, 30~120℃. When the temperature of wireless
temperature measuring modules become higher than 115, it will close the communication and
protect the RF communication module. When the temperature is lower than 115, it will restart 60
seconds later.
5 AlmTempAbs：110 absolute value of alarm temperature, 30~115℃. When the temperature of the temperature
measuring point is higher than 3 communication periods of it, the temperature value of the
temperature measuring point in the Host’s rotator screen will flash and in the meanwhile, it will alarm
and the relay will close. The remote computer uses the Modbus communication protocol to obtain
the host interior alarm sign position through the RS485.
6 AlmTempRel：60 relative temperature (temperature rise) alarm valve value, 20~75℃. When the temperature
difference between the temperature of the temperature measuring points and the environmental
temperature that the Host has motored is higher than 3 communication periods of the valve value,
the value of this temperature measuring point on the rotator screen will flash, and the alarm relay
will close in the meantime. The remote computer uses the Modbus communication protocol to
obtain the host interior alarm sign position through the RS485.
7 AlmTempUnbal：20 temperature difference among the cases alarm valve value, 20~50℃. Compare the temperature
value of CaseA, B ,C and when the temperature difference is higher than the valve value, it is
considered to have something abnormal occurring . The temperature value of this temperature
measuring point on the Host’s rotator screen will flash, and the alarm relay will close in the
meantime. The remote computer uses the Modbus communication protocol to obtain the host
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interior alarm sign position through the RS485.
8 RF_Comm_Cyc：12S set the periods of timing inquiry of temperature measuring modules, 3~60 seconds.
9 RF_Freq_Old：00 the wireless frequency range that the Host set last time, 00~99, cannot be set, only serves to
inquire.
10 RF_Freq_New：00 The host set up the wireless frequency range, 00~99, the host can set the frequency range, so as to
avoid the same frequency interference between the host. After the host sets the frequency range, it
will automatically modify the working frequency range of the monitored temperature measurement
module. When changing the frequency range, the operation indicator flashes 2 times per second
until the change is successful. When the input current of the module is too low, the setting will show
"LOW", indicating that the frequency range cannot be changed (when the current is sufficiently large
(30A) to be modified).
11 RF_Tnum：09 the number of wireless temperature measurement modules that motored by the Host, 01~16
12 ID_DTAE: 140225 The date in ID, all of the following ID use this date
13 ID1：111402250002 the ID number of the first temperature module. The screen will show all modules that motored by the
Host. Correct ID numbers should be set so that the Host can communication with modules. Change
the ID number( such as change the contact arm of the connector), the Host will change the working
frequency range of this ID into the Host’s frequency range. At this point in the sweeping frequency
state, the operation indicator flashes 4 times per second until the change is successful.
5.5 Description of alarm function
The alarms that come from the Hosts of temperature measurement include communication breakdown, overhigh temperature of temperature
measuring points, overhigh temperature rise of temperature measuring point, overlarge temperature differences among three cases. The trigger
condition of communication breakdowns is that the Hosts fail to communicate with temperature measuring modules for more than 3 minutes. But
once it recovers, the alarm will remove. However, as for the temperature alarm, the threshold valve value is determined by the Host’s parameters.
The valve value of alarming time is fixed——3 inquiry periods. For example, the inquiry period is 10 seconds, so when certain index is higher than
30 seconds will trigger the alarm, and to remove the alarm, it should go through 3 inquiry periods.
1、 Communication breakdowns of temperature measurement modules: When serious interferences or other breakdowns , the Hosts failing to
communicate with the temperature measurement modules and cannot establish the communication over 12 inquiry periods occur, they will
trigger the alarm. The first alarm relay will close and the alarming indicator light will light up in the same time. Once the communition is
recovered, the first alarm will remove immediately and it will disconnect and the alarming indicator light will be out.
2、 Overhigh temperature of the temperature measuring points: When the absolute value of the temperature of certain temperature measuring
module is higher than AlmTempAbs and lasts for 3 inquiry periods, it will trigger the alarm. The alarming relay II will close and the alarming
indicator light will light up. When the temperature value is lower than AlmTempAbs and lasts for 3 inquiry periods, the alarm will remove and
the alarming relay will disconnect and the alarming indicator light will be out.
3、 Overhigh temperature rise of temperature measuring points: When you compare the temperature of certain temperature measuring module
with environmental temperature, the temperature difference is higher than AlmTempRel and lasts for 3 inquiry periods will trigger the alarm.The alarming relay II will close and the alarming indicator light will light up. When the temperature difference is lower than the AlmTempRel and
lasts for 3 inquiry periods, the alarm will remove and the alarming relay II will disconnect and the alarming indicator light will be out.
4、 Overlarge temperature differences among three cases of temperature measuring points: when compare with the temperature measuring point
1, 2, 3 or 4, 5, 6 or 7, 8, 9, the temperature difference between the maximum value and the minimum value is higher than AlmTempAbs and
lasts for 3 inquiry periods, it will trigger the alarm. The alarming relay II will close and the alarming indicator light will light up. When the
temperature difference is lower than AlmTempAbs and lasts for 3 inquiry periods, the alarm will remove and the alarming relay will disconnect
and the alarming indicatorlight will be out. When one of the three circuits happens to have communication breakdown, this circuit will not be
compared.
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6. Specification for Module WLTP300S
In this system, the temperature is measured directly by digital temperature sensor. The digital temperature sensor can operate effectively under the
complex conditions of the magnetic field, electric field and thermal field of the power grid, and has strong anti-interference ability.
Wireless temperature measurement module uses CT power supply, when the primary side current is in 15A~4000A, the module of MCU, digital
temperature sensor, wireless communication module can work normally.
The main position of the temperature sensor is mounted on the circuit breaker moving contact or static contact, busbar, cable connection, high
voltage switch cabinet, for contact with direct suit, for the bar with high temperature nylon tape will be fixed.
6.1 External size and installation for module
6.1.1 WLTP300SR-79、WLTP300SR-49
Installation:
Put the temperature measuring ring cover the root of fixed contact
Installation:
Put the temperature measuring ring cover the root of fixed contact, use
slotted screwdriver to tighten the tightened screw on the ring, meanwhile,
the moving support leg should hold out against internal wall of spout.
Cautions:
The temperature measuring ring is suitable for static contact diameter
79~ 109mm, spout internal diameter bigger than 159mm.
Cautions:
A. The tighting screw should be towards outside, and the other three
self-tapping screws of casing should be towards inside.
B. The temperature measuring ring is suitable for static contact diameter
35~ 49mm, spout internal diameter 98~132mm.
Fixed by tighten this screw
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6.1.2 WLTP300ST35
PIC 6.1.2－2
Open the silicon steel sheet&bandage and lean against the busbar, and make the silicon steel sheet&band bend and shaped(fits for the busbar),
put bandage into buckle straps, and then tie into the buckle (specific above piture 6.1.2 - 2).
Cautions: before installing the WLTP300ST35, it is necessary to dig a hole in the heat shrinkable tube protection sleeve where the probe contacts
with copper bar, so that the probe can get the best effect of induction temperature after directly contacting with the copper bar.
6.2 Pictures for modules
PIC 6.2－1 WLTP300SR-R79
PIC 6.2－2 WLTP300SR-R49
PIC 6.2-3 WLTP300ST35
7. Function for Modbus communication
7.1 Communication format and definition of register
The Hosts of temperature measurement support Contract Modbus, adopt Format RTU, has 1 start bit, 8 data digits, 2 stop bits and the Baud Rate is
9600. The Agreement support Order 01, 03, 04, 06.
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Modbus registers use five-figure dicimalism, and the top digit shows the variable values. The definitions are as follow:
Registers’ number Registers’ address Description Value range Remarks
00001~00053 00000~00052 Quantities of the state of alarm 0、1 Read only, Order 01
00001~00016 00000~0000F The failure marks of number1~16 temperature
measurement modules
0、1 1 alarm，0 normal
00017~00032 00016~00031 Alarm of overhigh temperature of number1~16
temperature measurement modules
0、1 1 alarm，0 normal
Reserve
00033~00048 00032~00047 Alarm of overhigh temperature rises of number1~16
temperature measurement modules
0、1 1 alarm，0 normal
Reserve
00049~00053 00048~00052 Alarm of overlarge temperature differences among
Group1~5 temperature measuring points
0、1 1 alarm，0 normal
30001~30019 30000~30018 Imput the Register Read only, Order 04
30001 30000 Environment temperature，Unit:℃ -20~125 Have symbolic numbers
30002~30017 30001~30016 The temperature values of number1~16 temperature
measurement modules Unit: ℃
-20~125
-55
Have symbolic numbers, -20~125 is
the normal temperature value for
module, however, -55 is the value
when communication fails which
is distinguished from the normal value.
30018~30032 Reserve
30033~30019 30032~30047 The state value of Number1~16 temperature
measurement modules
Reserve
40001~40036 40000~40035 Keep the register Read Order03
40001 40000 RF high temperature protection valve value
Unit: ℃
30~120 See the description of the
parameter-setting screen
40002 40001 The absolute value of alarming temperature
Unit: ℃
30~115 See the description of the
parameter-setting screen
40003 40002 The alarming valve value of temperature rise
Unit: ℃
20~75 See the description of the
parameter-setting screen
40004 40003 The alarming valve value of temperature differences
among three cases Unit: ℃
20~50 See the description of the
parameter-setting screen
40005 40004 Timing inquiry of the periods of temperature measurement
modules Unit:Second
6~60 See the description of the
parameter-setting screen
40006 40005 The wireless frequency range that the Host set last time,
read only
00~99 See the description of the
parameter-setting screen
40007 40006 The wireless frequency range that the Host set to use last
time
00~99 See the description of the
parameter-setting screen
40008 40007 The number of wireless temperature measurement
modules monitored by the host
01~16 See the description of the
parameter-setting screen
40009~40011 40008~40010 The ID number of Number1 temperature measurement
module，6 bytes
See the description of the
parameter-setting screen
40012~40014 40011~40013 The ID number of Number2 temperature measurement
module
40015~40036 40014~40056 The ID number of Number3~16 temperature measurement
modules
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7.2 Description of Communication Agreement
7.2.1 Read alarm state variables
The sending end in the remote computer can only read 53 alarming status bits at one time. Format:
Address Function
Code
Initial Address of
Register
The number of
Registers
CRC Checkout
1 bit 0x01 0x00 0x00 0x00 0x35 2 bits, low in the front and high in the back
The Host returns
Address Function
Code
Number of Bytes of data Data Area CRC Checkout
1 bit 0x01 0x07 7 bits of quantities of
status
2 bits, low in the front and high in the back
7.2.2 Read temperature data
The sending end in the background can only read the temperature value of the continuous temperature measuring point at one time (the starting
address is 00 and the number is unlimited). Format:
Address Function
Code
Initial Address of
Register
The number of
Registers
CRC Checkout
1 bit 0x04 0x00 0x00 0x00 N(N<0x11) 2 bits, low in the front and high in the back
The Host returns
Address Function
Code
Number of Bytes of data Data Area CRC Checkout
1 bit 0x04 2*N 2*N bits of
temperature value
2 bits, low in the front and high in the back
7.2.3 Read the Hosts’ parameters
The sending end in the remote computer can read each host parameterindividually, or read multiple hosts parameters at one time (but not more
than 16 hosts). Format:
Address Function
Code
Initial Address of
Register
The number of
Registers
CRC Checkout
1 bit 0x03 0x00 0x00 0x00 0x08 2 bits, low in the front and high in the back
The Host returns
Address Function
Code
Number of Bytes of data Data Area CRC Checkout
1 bit 0x03 0x10 16 bits of the Hosts’
parameters values
2 bits, low in the front and high in the back
7.2.4 Read the ID number of module
The sending end can only read one or more temperature module ID numbers (but not more than 5). Format:
Address Function
Code
Initial Address of
Register
The number of
Registers
CRC Checkout
1 bit 0x03 0x00 (0x08+i*3)
i=0~15
0x00 0x03 2 bits, low in the front and high in the back
The Host returns
Address Function
Code
Number of Bytes of
data
Data Area CRC Checkout
1 bit 0x03 0x06 6 bits of the ID number 2 bits, low in the front and high in the back
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of modules
7.2.5 Response to Abnormalities
When the Host receives these data , if the address matches but the data are wrong, it will return to the “ response to abnormalities”.
Adress Function Code Abnormal Code CRC Checkout
1 bit 0x80+receiving function code 0x 2 bits, low in the front and high in the back
The definitions of abnormal codes are as follow:
0x01: illegl function
0x02: illegal data address
0x03: illegal data value
8. Description of on-site debugging
After the switchgear and the breaker have installed wireless temperature measurement modules, you need to set the ID number of the temperature
measurement modules for Host-inquiry in WLTP300M. Pay attention that this ID number should be the same with the module’s ID number, or it
will fail to establish the contact. In general, for the busbar temperature measurement, busbar A, B, C can be set to be Circuit1, 2, 3. For the
temperature measurement of the fixed contact, we suggest that the upper arms A, B, C of fixed contacts can be set to be Circuit3, 4, 5, and the
lower arms A, B, C of fixed contacts can be set to be Circuit6, 7, 8. Please install the module based on module ID number of host installation
instructions. On the setting screen, input modules’ ID number one by one, and set the Host’s working frequency range. Pay attention that the
frequency range of each Host in the station must be different. A station host ≤ 99 units, each cabinet’s frequency range and the adjacent
cabinet’s frequency range are as far as possible staggered; > 99 units, the same frequency of the cabinet is as large distance as possible.
In debugging, the user can generate 30A by current generator (below 30A wireless temperature measurement module is in the ultra low-power
mode, it only transmits temperature data, not receiving the order, cannot change the frequency range ) The AC current is added to the primary
circuit (circuit breaker is in the closing state), which makes the normal work of module. When the host is successfully communicated with the
module, running indicator lights flashing 1 times per second, all the temperature shows normal, continue to debug the next cabinet.
Supposing that there are 6 fixed contacts and 3 busbars to measure the temperature, the module number of busbar A, B, C are
211402250031~211402250033, the module number of the upper arms A, B, C of fixed contacts are 111402250034~111402250036, and the number
of the lower arms A, B,C are of fixed contacts are 111402250037~111402250039, then when you are setting ID numbers, you should do as follows:
ID1：211402250031 ID2：211402250032 ID3：211402250033
ID4：111402250034 ID5：111402250035 ID6：111402250036
ID7：111402250037 ID8：111402250038 ID9：111402250039
After setting, on the temperature rotator screen, when communication is sucessful, it shows:
Then the temperature value of Busbar A,B,C are 30, 31, 32℃, the contacts of upper arms A, B, C are 33, 34, 35℃, and the contacts of lower arm A,
B, C is 36, 37, 38℃, the temperature of the host(main controller) is 29℃. You can turn this page to continue to check other circuits’ temperature,
confirming that all temperature values have obtained correctly.
9. Common breakdowns and remedies of exclusion
Number Phenomenon Cause Remedies to exclude the breakdown
1 No display on the LCD
No alternating current power supply or the
supply voltage is too low.
Check alternating current power supply and
wirings.
In-house line breaks down. Contact the manufacturer to get technical support.
Xiamen Leelen High Voltage Electric Co.,Ltd
User manual for wireless temperature measurement system WLTP300
13
2
No display of the
temperature of the
wireless temperature
measuring points.
Primary current of the temperature
measuring point is too low so that the module
can’t start.
Recover communication automatically when the
primary current is high.
The frequency range of the temperature
measurement module is not the same as the
Host’s.
Set ID number and make the Host sweep
frequency.
The ID number of the temperature
measurement module is not the same as the
Host’s.
Set the ID again.
10. Attachment
1. This brochure 1
2. Procduct qualification certificate 1
Appendix: application cases for module WLTP300S
WLTP300SR-R79 WLTP300ST35
WLTP300SR-R79 WLTP300SR-R49
	User manual for wireless temperature measurement s
	1. Introduction for WLTP300
	2. Specification
	3. Description for type choosing
	4. Function
	4.1 Technical parameters
	4.2 Using conditions
	4.3 Main function for host and module
	 4.4 Function for displaying and pressing button 
	 4.5 Function for setting parameters
	 4.6 Function for communication
	5. Operating guidance for host (main controller)WL
	5.1 Description of terminal connection
	5.2 Host (main controller) Dimension
	5.4 Description of screen
	5.4.1 Starting screen
	5.4.2 Temperature rotator screen
	5.4.3 Parameter-setting screen
	5.5 Description of alarm function
	6. Specification for Module WLTP300S
	6.1 External size and installation for module
	6.1.1 WLTP300SR-79、WLTP300SR-49
	6.1.2 WLTP300ST35
	7.Function for Modbus communication
	7.1 Communication format and definition of regist
	7.2 Description of Communication Agreement
	7.2.1 Read alarm state variables
	7.2.2 Read temperature data
	7.2.3 Read the Hosts’ parameters
	7.2.4Read the ID number of module 
	7.2.5 Response to Abnormalities
	8. Description of on-site debugging
	9. Common breakdowns and remedies of exclusion
	Appendix:application cases for module WLTP300S