Savch SMC-W01EN User manual

SAVCH Programmable Logic Controller
Load Cell Module
User Manual & Application Case
User Manual

Contents
Chapter 1 User Manual ............................................................................................................................................1
1. Products receiving.........................................................................................................................................1
2. Model description..........................................................................................................................................1
3. Product model list & dimensions...................................................................................................................1
4. Front / side view............................................................................................................................................2
5. Indicator Description .....................................................................................................................................2
6. Power Supply Specification...........................................................................................................................3
7. Environmental Specifications for Product.....................................................................................................3
8. Module Parameter Table...............................................................................................................................3
9. Load Cell Connections..................................................................................................................................3
10. Multiple-load-Cell Parallel Connections......................................................................................................4
11. Terminal connection diagram ......................................................................................................................4
12. Module parameter table (CR code means the corresponding Modbus register address).........................5
13. Mounting and Installation..........................................................................................................................11
Chapter 2 Application Case....................................................................................................................................12
1. The Module is extended through the parallel port of the host ....................................................................12
1.1 Load Cell Modules Power Supply......................................................................................................12
1.2 Load Cell Module Operation Procedure............................................................................................12
1.3 Hardware Configuration.....................................................................................................................13
1.4 Weight 16-bit/32-bit display switching ...............................................................................................13
1.5. Calibration methods and program examples....................................................................................13
1.6 Read the current weight.....................................................................................................................16
1.7 Adjustment of stability and responsiveness of weighing value..........................................................16
1.8 Gross Weight and Net Weight...........................................................................................................18
1.9 Automatic peeling 2DH (judged every 5S) ........................................................................................19
1.10 Weighing status................................................................................................................................19
1.11 Standstill check function...................................................................................................................19
1.12 Zero point detection function...........................................................................................................20
1.13 Restore factory default parameters.................................................................................................20
2. Load cell module for remote IO...................................................................................................................21
2.1 Load Cell Module power supply ........................................................................................................21
2.2 Communication interface introduction...............................................................................................21
2.3 Communication protocol and default parameters..............................................................................21
2.4 When Module is used for remote IO, Module communication parameter configuration method is
introduced as folllows:..............................................................................................................................21
2.5 Parameter configuration example:configuring the Module through programming software “remote
Module tool”. ............................................................................................................................................21
2.6 Examples of remote IO applications:reading Module real-time weight.............................................23
2.7 Examples of remote IO applications: calibration...............................................................................23

1
Chapter 1 User Manual
1.1 Products receiving
All products have been performed with strict test and inspection. After receiving the inverters, the following
checks shall be performed.
●To check that SAVCH inverter, an instruction manual is inside of the package
●To check whether model number correspond with model your purchase order.
●To check whether there are damaged parts during transportation and delivering. If there are, do not connect
with power supply.
If any of the above checkpoints are not satisfactory, contact your SAVCH ELECTRIC representative for a quick
resolution.
1.2 Model description
Programmable
Logic Controller
Model：SMC-W01EN
Power：DC24V 0.2A
P/N：1605261053011810012
SAVCH ELECTRIC CO.,LTD.
Product name
S M C - W 01 E N
Product Series
W (Load cell)
Output type
N (No digital I/O)
Module type
M (Main)
E (Extension module)
I/O point
1.3 Product model list & dimensions
Model
Power Consumption
Dimension
SMC-W01EN
0.2 A
30×95×82mm
SMC-W02EN
0.3 A
123
LINK
PWR
0
SMC-W01EN
35.0
95.0
30.082.0

2
1.4 Front / side view
0 1 2 3
PWR
LINK
SMC-W02EN
①
②
③
④
①
⑤
⑥⑦
⑥
EXC+
EXC-
SHD
SIG+
SIG-
CH2
0 1 2 3
CH1
CH2
EXC+
EXC-
SHD
SIG+
SIG-
CH1
⑧
⑨
1. Terminal definition
6. Pluggable terminal
2. Weighing status indicator
7. Module expansion port
3. Model
8. Module nameplate
4. PWR:power indicator,
LINK:Module communication indicator
9. 35mm DIN rail
5. DIN rail mounting slot
1.5 Indicator Description
(1) PWR:Power indicator. Green, power is normal; No light - power is abnormal.
(2) 0:ON:gross weight; 1:ON:net weight;
2:ON:tare weight; 3:ON:calibration.
(3) LINK:Multi-status indicator .three colors (Red. Yellow. Green). As follows:
Reference processing
mode
Module bus state
LINK indicator state
Normal
No communication of Module
No light
MPU has identified the Module
but no communication
Constant light in green
Serial or parallel port in
communication
Green jitter:indicator on 30ms and off 30ms
Parallel power supply
insufficient, must connect
to external power supply
Without serial or parallel port in
communication
Yellow flicker:indicator on 0.5s and off 0.5s
With serial or parallel port in
communication
Yellow indicator off and jitter
alternates:indicator off 0.5s and jitter 0.5s
Firmware upgrade failed,
re-upgrade the Module
firmware
Without serial or parallel port in
communication
Red flicker:indicator on 0.5s and off 0.5s
With serial or parallel port in
communication
Red indicator off and jitter
alternates:indicator off 0.5s and jitter 0.5s
Hardware failure
Without serial or parallel port in
communication
Always on in red
With serial or parallel port in
communication
Red jitter quickly:indicator on 30ms and off
30ms

3
1.6 Power Supply Specification
Item
DC Power Supply
Power supply voltage
24VDC -15%~+20%
Power supply frequency
——
Instantaneous surge
MAX 20A 1.5ms @24VDC
Permit Power supply loss
10ms or less
Isolation Model
No Electrical isolation
Power Protection
DC input power polarity reverse, over voltage protection
1.7 Environmental Specifications for Product
Item
Environment Specification
Temperature/humidity
Operating temperature:0~+55℃
Storage temperature:-25~+70℃
Humidity:5~95%RH, No condensation
Anti Vibration
10~57 HZ, amplitude=0.075mm, 57HZ~150HZ acceleration=1G, 10
times each for X-axis, Y-axis and Z-axis
Anti Shock
15G, duration=11ms, 6 times each for X-axis, Y-axis and Z-axis
Anti jamming
DC EFT:±2500V Surge:±1000V
Operating environment
Avoid dust, moisture, corrosion, electric shock and external shocks
1.8 Module Parameter Table
Item
Specification
Power supply
24VDC±20%,0.2A
A/D conversion method
24Bits △Σ
A/D conversion speed
6.25/12.5/25/50/100/200/500Hz
Internal resolution
24bits
linearity error
Static weighing≤ 0.02% FS
Excitation Voltage
5VDC ±5% , 125mA ( it can connect with 4 load Cells each 350 Ω )
Sensor sensitivity
1mV/V~5 mV/V
Measurement pulse
0~2000Hz 24VDC
Load Cell form
4- line connection or 6-line connection load Cells
Maximum distance to connect the
sensor
100 meters
1.9 Load Cell Connections
SIG+
EXC+
SIG-
EXC-
EXC+
EXC-
SIG+
SIG-
4芯传感器与仪表接线图
SHD
传感器 屏蔽电缆
激励正
激励负
屏蔽线
信号正
信号负
4-wire sensor and instrument connection

4
SIG+
SIG-
EXC+
EXC-
SHD
SIG+
SIG-
6芯传感器与仪表接线图
传感器 屏蔽电缆
激励正
激励负
屏蔽线
信号正
信号负
EXC+
SEN+
EXC-
SEN-
EXC+
EXC-
6-wire sensor and instrument connection
1.10 Multiple-load-Cell Parallel Connections
Load cell
Load cell
Load cell
Load cell
SMC-W01EN-
Load cell
Load cell
Load cell
Load cell
SMC-W02EN Load cell
Load cell
Load cell
Load cell
CH2
CH1
1.11 Terminal connection diagram
SMC-W01EN
24V
0V
A+
B-
DC IN
SIG+
SIG-
GND
RS485
EXC+
EXC-
SHD
SMC-W02EN
SIG+
SIG-
EXC+
EXC-
SHD
SIG+
SIG-
EXC+
EXC-
SHD
CH1
CH2

5
1.12 Module parameter table (CR code means the corresponding Modbus
register address)
Note:CR code is corresponding to the Modbus register address.
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
00H
Low byte for Module code, Higher 3-bit of the
High-Byte is ID number. Lower 5-bit of
High-Byte is version number.
R
xxxx
01H
Communication Address
R/W
1
Range:1~247
02H
Communication Protocol
Low byte lower 4-bit:
0 - N,8, 2 For RTU
1 - E,8, 1 For RTU
2 - O 8, ,1 For RTU
3 - N,7, 2 For ASCII
4 - E,7, 1 For ASCII
5 - O,7, 1 For ASCII
6 - N,8, 1 For RTU
Low byte higher 4-bit:0 –2400
1 –4800 2 - 9600
3 - 19200 4 - 38400
5 –57600 6 - 115200
R/W
48
(19200,
N,8, 2
RTU)
03H
Module name
R/W
04H
Module name
R/W
05H
Module name
R/W
06H
Module name
R/W
07H
IP address, default 192.168.1.111
R/W
0x016F
08H
IP address, default 192.168.1.111
R/W
0xC0A8
09H
Month/date
R
0AH
Year batch number
R
0BH
High byte subnet mask( b3~b0,”1” means 255,
“0” means 0, for example subnet mask
255.255.255.0 b3~b0=1110), low byte
manufacturer code HW
R/W
Low byte code cannot
be modified
0CH
Verification code
R
0DH
Serial number low byte
R
0EH
Serial number high byte
R
0FH
Error Code
0:normal
1:illegal firmware identity
2:firmware incomplete
3:system data access exception
4:No external 24V power supply
R
10H
Channel 1 average weight
R
11H
Channel 1 status code
bit0:No-load( zero point weight)
bit1:exceed the upper limit of weight
bit2:measurement value stable
bit3~15:reserve
R

6
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
12H
Channel 1 real-time weight
R
13H
Channel 1 uses 32-bit display flags:
0:16-bit weight display
1:32-bit weight display
R/W32
0
14H~15H
Channel 1 Real-time Weight 32 Bit Value:
14H:32-bit low byte
15H:32-bit high byte
R
0
16H~17H
The average weight of channel 1 is 32 bits:
16H:32-bit low byte
17H:32-bit high byte
R
0
18H
Channel 1 Skin Weight Low Bytes
R/W
0
16 bits to 18H, 32 bits
to 18H19H
19H
Channel 1 Skin Weight High Bytes
R/W
0
1AH
Channel 1 Control Setting
Bit 0:Reservation
Bit 1:Gross/Net Weight Display, 0-Gross
Weight, 1-Net Weight
Bit2-15:Reservation
R/W
0
Switch the current
display weight to
rough weight or net
weight, us the value
of 19H to work as tare
weight
1BH
Channel 1 sampling frequency
0-7.5Hz,1-15Hz,2-30Hz,3-60Hz,4-120Hz,
5-240Hz,6-480Hz,7-960Hz
R/W
3
range:0~7
1CH~1DH
Reserve
R
1EH
Channel 1 average number of times
R/W
10
range:1~100
1FH
Channel 1 filter ratio
R/W
2
range:0~5
20H
Channel 1 stability examination times
R/W
5
range:0~500
21H
Channel 1 stability examination range
R/W
10
range:0~10000
22H
Channel 1 zero point tracking intensity
0 :close zero point tracking function
Others:zero-point tracking intensity (absolute
value)
R/W
0
Absolute value,
range:0~200
23H
Channel 1 zero point detection range
R/W
10
Absolute value,
range:0~10000
24H
Channel 1 upper limit of weight
Set the upper limit value of weight, when
measurement value is over the set value will
record error code.
R/W
32767
25H
Channel 1 Skin Weight Read (Settings)
At 16-bit display, the current weight value
(10H) is read as the weight value of the
leather weight and stored at 18H.
When 32-bit display, read CR16H and CR17H
as skin weight Z value, and store them at 18H
and 19H.
R/W
0
0:no operation
1:Read the weight
value as the tare
weight and store it at
18H and 19H.
Others:Invalid

7
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
26H
Channel 1 Calibration Weighing Instruction
Supports Maximum 3-segment Calibration.
Write value 1:Enter calibration mode and zero
current average weight.
Write value 2:End the calibration process.
-------------------------------------------------------------
User proofreading steps (16 bits):
Step1:No weights on the weighing unit.
Step2:CR26H write value 1, enter calibration
mode.
Step3:Paragraph 1. Calibration. Add a
standard weight to the weighing unit and write
the weight of the current chassis into CR27H.
Step4:If you need to calibrate the second
paragraph, add another standard weight to the
weighing unit and write the weight on the
current chassis to CR29H. If you don't need it,
go to Step6.
Step5:If you need to calibrate paragraph 3,
add another standard weight to the weighing
unit and write the weight on the current
chassis into CR2BH. If you don't need it, go to
Step6.
Step 6:CR26H Writes value 2 to end the
calibration process.
-------------------------------------------------------------
User calibration step (32 bits):
Step1:No weights on the weighing unit.
Step2:CR26H write value 1, enter calibration
mode.
Step3:Paragraph 1. Calibration. Add a
standard weight to the weighing unit and write
the weight on the current chassis into CR27H
28H.
Step4:If the second calibration is needed, add
another standard weight to the weighing unit
and write the weight on the current chassis
into CR29H 2AH. If not, go to Step6.
Step5:If you need to calibrate paragraph 3,
add another standard weight to the weighing
unit and write the weight on the current
chassis into CR2BH 2CH. If you don't need it,
go to Step6.
Step 6:CR26H Writes value 2 to end the
calibration process
R/W
0
Before use, the
weight adjustment
should be completed
step by step.
27H
Low bytes of base weight of weights in
channel 1, paragraph 1
R/W
2000

8
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
28H
High bytes of base weight of weights in
channel 1, paragraph 1
R/W
0
29H
Low bytes of base weight of weights in
channel 1, paragraph 2
R/W
0
2AH
High bytes of base weight of weights in
channel 1, paragraph 2
R/W
0
2BH
Low bytes of base weight of weights in
channel 1, paragraph 3
R/W
0
2CH
High bytes of base weight of weights in
channel 1, paragraph 3
R/W
0
2DH
Automatic peeling range of channel 1
R/W
0
2EH
Channel 1 Weight Upper Limit Low Bytes (32
Bit Display)
R/W
32767
2FH
Channel 1 Weight Upper Limit High Bytes (32
Bit Display)
R/W
32767
30H~4FH
Reserve
R
0
50H
Channel 2 average weight
R
51H
Channel 2 status code:
bit0:no-load（zero point weight)
bit1:exceed the weight upper limit
bit2:stability of measurement value
bit3~15:reserved
R
52H
Channel 2 Real-time weight
R
53H
Channel 2 uses 32-bit display flags:
0:16-bit weight display
1:32-bit weight display
R/W32
54H~55H
Channel 2 Real-time Weight 32 Bit Value:
54H:32-bit low byte
55H:32-bit high byte
R
56H~57H
The average weight of channel 2 is 32 bits:
56H:32-bit low byte
57H:32-bit high byte
58H
Channel 2 Skin Weight Low Bytes
R/W
0
16 bits only use 58H,
32 bits use 58H 59H.
59H
Channel 2 Skin Weight High Bytes
R/W
0
5AH
Channel 2 Control Setting
Bit 0:Reservation
Bit 1:Gross/Net Weight Display, 0-Gross
Weight, 1-Net Weight
Bit2-15:Reservation
R/W
0
Switch the current
display weight to wool
Weight or net weight,
used in calculation
the value of 58H and
59H as tare weight
5BH
Channel 2 sampling frequency
0-7.5Hz,1-15Hz,2-30Hz,3-60Hz,4-120Hz,
5-240Hz,6-480Hz,7-960Hz
R/W
3
range:0~7
5CH-5DH
Reserved
R
5EH
Channel 2 average number of times
R/W
10
Range:1~100

9
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
5FH
Channel 2 filter ratio
R/W
2
range:0~5
60H
Channel 2 standstill checking times
R/W
5
range:0~500
61H
Channel 2 standstill checking range
R/W
2
range:0~10000
62H
Channel 2 zero tracking intensity
0 :close zero tracking function
others:show zero tracking intensity
(absolute value)
R/W
0
Absolute value,
range:0~200
63H
Channel 2 zero-point detection range
R/W
10
Absolute value,
range:0~10000
64H
Channel 2 weight upper limit
Set the upper limit value of weight, when
measurement value is over the set value will
record error code
R/W
32767
65H
Channel 2 Skin Weight Read (Settings)
When 16-bit display, read the current weight
value (50H) as the weight value of the leather
weight and store it at 58H.
When 32-bit display, read CR56H and CR57H
as skin weight Z value and store them at 58H
and 59H.
R/W
0
0:no operation
1:Read the weight
value as the tare
weight and store it at
58H,59H.
Others: Invalid
66H
Channel 1 Calibration Weighing Instruction
Supports Maximum 3-segment Calibration.
Write value 1:Enter calibration mode and zero
current average weight.
Write value 2:End the calibration process.
-------------------------------------------------------------
User proofreading steps (16 bits):
Step1:No weights on the weighing unit
Step2:CR66H write value 1, enter calibration
mode.
Step3:Paragraph 1. Calibration. Add a
standard weight to the weighing unit and write
the weight on the current chassis into CR67H.
Step4:If you need to calibrate the second
paragraph, add another standard weight to the
weighing unit and write the weight on the
current chassis to CR69H. If you don't need it,
go to Step6.
Step5:If you need to calibrate paragraph 3,
add another standard weight to the weighing
unit and write the weight on the current
chassis into CR6BH. If you don't need it, go to
Step6.
Step 6:CR66H write value 2, end calibration
process
-------------------------------------------------------------
User calibration step (32 bits):
R/W
0
Before use, the
weight adjustment
should be completed
step by step.

10
CR code(Hex)
communication
address
Function description
Property
Factory
default
Remarks
Step1:No weights on the weighing unit
Step2:CR66H write value 1, enter calibration
mode.
Step3:Paragraph 1:Calibration. Add a
standard weight to the weighing unit and write
the weight on the current chassis into CR67H
68H.
Step4:If the second calibration is needed, add
another standard weight to the weighing unit
and write the weight on the current chassis
into CR69H 6AH. If not, go to Step6.
Step5:If the calibration of paragraph 3 is
required, add another standard weight to the
weighing unit and write the weight on the
current chassis into CR6BH 6CH. If not, go to
Step6.
Step 6:CR66H write value 2, end calibration
process
67H
Low bytes of base weight of weights in
channel 2, paragraph 1
R/W
2000
68H
High bytes of base weight of weights in
channel 2, paragraph 1
R/W
0
69H
Low bytes of base weight of weights in
channel 2, paragraph 2
R/W
0
6AH
High bytes of base weight of weights in
channel 2, paragraph 2
RW
0
6BH
Low bytes of base weight of weights in
channel 2, paragraph 3
RW
0
6CH
High bytes of base weight of channel 2,
paragraph 3
RW
0
6DH
Automatic peeling range of channel 2
RW
0
6EH
Channel 2 Weight Upper Limit Low Bytes
(32Bit Display)
RW
32767
6FH
Channel 2 Weight Upper Limit High Bytes
(32Bit Display)
RW
32767
70H-9EH
Reserved
R
0
9FH
Restoring factory parameters of configurable
CR
RW
1
The default value is 1
and 0 is written to the
CR to restore the
factory parameters of
the configurable CR.

11
1.13 Mounting and Installation
The PLC should be secured to an enclosed cabinet while mounting. For heat dissipation, make sure to provide a
minimum clearance of 50mm between the unit and all sides of the cabinet.
Rail mounting:Use standard 35 mm rail.
Screw mounting:Each MPU or extension Module has two positioning screw holes, the diameter of the hole is
4.5mm. Please refer to the dimension figure for the location of the positioning holes and their spacing.
To avoid over temperature and for a better heat dissipation, do not mount PLC to a position near to the bottom/top
of the cabinet. Do not mount PLC in vertical direction.
Extension Module wiring:Connections between extension Modules and connections between Module and MPU
are achieved through bus.A extension cable will be configured to every extension Module, for the connection
between two different Modules.Connection methods:turn the right side of extended interface(the last MPU or
extension Module) over, plug the extension cable in the extended interface, then press down the cover of the
extended interface to reset the interface, the extended interface at the right side of the Module will be reserved for
extension of the next Module. Connect all extension Modules in turn in the same way.

12
Chapter 2 Application Case
(The sample program is SMC-W01EN and SMC-W02EN 1 channel program, the method of using 1, 2 channels
is the same, as long as the CR number is changed to the corresponding value of the second channel.)
2.1 The Module is extended through the parallel port of the host
2.1.1 Load Cell Modules Power Supply
All expansion Modules of SAVCH do not require external power supply, can be directly powered by the
parallel port of the host.
If the PLC is 24VDC power supply, the external switching power supply is supplied to the host, and the
extensions are powered by the parallel port from the host plc. The Module power supply is essentially from the
external switch power supply, so the Module needs no additional external power supply. If the expansion Module
has insufficient power supply (the PWR light on the Module is not bright), the external switching power supply
capacity is not enough. The correct approach is to enlarge the power supply of the external switch power.
If the host PLC is 220VAC power supply, the extension Modules are powered by the parallel port from the
host plc, the expansion Module does not need to connect the external power supply; if the expansion Module is
in insufficient power supply (the PWR lamp on the Module is not bright), the correct approach is to supply the
power supply Module only by a single switch power supply. (This case happens when the number of expansion
Modules is too big and external loads are too much).
SAVCH extension Module can be used as remote IO, so it will not be restricted by the number of system I/O
points, and can be installed distributively, reducing cable wiring and solving the problem of interference caused
by the long distance of traditional wiring. When Modules are used as remote IO, they need power to be supplied
externally The external power supply of the Module is optional with 24VDC and 220VAC.
2.1.2 Load Cell Module Operation Procedure

13
When we get the weighing Module.
The first step: Calibration. The weight can be read directly after calibration.
The second step: Read the weight. One is average weight and the other is real-time weight. We usually read
average weight.
The third step: Adjust the stability and responsiveness of weighing. The above two factors affect the
sampling frequency, average number and filtering rate. Therefore, we can adjust the above three parameters get
proper stability and responsiveness .
The fourth step: In order to make the usage more convenient, we also provide the status-value for the load
Cell Module, if the current status is like no-load, exceeding the upper limit, or value measurement with stability.
We can achieve the automatic judgment control of weighing. At the same time, it also has the functions of gross
weight setting, zero-point tracking, automatic tare-removing, and so on.
To introduce the weighing Module programming and practical use.
2.1.3 Hardware Configuration
In this case, the host is N40S2T, with a load Cell Module, so the hardware configuration is as follows:
2.1.4 Weight 16-bit/32-bit display switching
Module weight 16-bit display and 32-bit weight display are two modes. Take Channel One as an example,
16-bit/32-bit weight switching can be realized by CR13H, 16-bit display for 13H writing 0 and 32-bit display for
writing 1. The program example is as follows.
2.1.5. Calibration methods and program examples
The weighing module supports three-stage calibration and can realize multi-range and one-time scale
calibration. Taking Channel 1 as an example, the calibration steps are as follows:
User operation steps:
Step1:No weight is put on the weighing unit.
Step2:CR26H write value 1, enter the calibration mode;

14
Step3:In the first paragraph, a standard weight is added to the weighing unit, 16-bit scale writes the weight
on the current chassis into CR27H, 32-bit scale writes into CR27H and CR28H, if no multi-stage
calibration criteria are needed to Step6;
Step4:If the second calibration is needed, add another standard weight to the weighing unit, 16-bit scales will
write the weight on the current chassis into CR29H, 32-bit scales will write into CR29H and CR2AH, if
there is no need for multi-stage calibration criteria to Step6;
Step5:If you need the calibration in paragraph 3, add another standard weight to the weighing unit, 6-bit
scales will write the weight on the current chassis into CR2BH, 32-bit scales will write into CR2BH
and CR2CH, if not to Step6;
Step6:CR26H writes value 2 to end the calibration process.
Examples of multi-section calibration procedures are as follows:

15
An example of 32-bit multi-segment calibration program is as follows:

16
2.1.6 Read the current weight
The weight read by module is divided into average weight and real-time weight. Usually we read average
weight. The average weight CR of 16 bits is 10H, and the real-time weight CR of 16 bits is 12H.
The program example is shown below.
The average weight CR of 32 bits is 16-17 H, and the real-time weight CR of 32 bits is 14-15 H. The sample
program is as follows.
2.1.7 Adjustment of stability and responsiveness of weighing value
The stability and responsiveness of the weight read by the module will be adjusted according to different
requirements in practical applications. The two factors that affect the stability and responsiveness of the module
are sampling frequency, average number of times and filtering ratio. So we can adjust the above three
parameters to achieve the adjustment of stability and responsiveness.
1BH: Sampling Frequency
Sampling frequency, that is, the number of sampling times in one second, such as 1BH = 3, that is, 60 times
of weight in one second. The quicker the sampling times are, the faster the average calculation is, so the quicker
the average and real-time weights of weighing are updated. But the stability decreases with the increase of
sampling times.

17
1FH: Filtering Ratio
The larger the register value is, the larger the filtering ratio is, the more stable the average weight value
(10H), but the delay will increase and the sensitivity will decrease. The function of filtering is to filter the abrupt
change so that the average value of the filter can not be affected by the abrupt change. The filtering scale ranges
from 10% to 50%. The default is 2, that is, 20%, assuming the average number of times is 10, then the system
will arrange the 10 data collected from large to small, and the filtering ratio is 20%. That is to say, two data will be
screened out, that is, one maximum value will be removed, another minimum value will be removed, and finally
an average value will be obtained.
1EH:Average Number
The larger the register value, the more the number of samples, the more accurate the average weight (10H),
but the slower the update speed. The default is 10, that is, every 10 weight data collected, the average value is
calculated once and the average weight is updated.

18
2.1.8 Gross Weight and Net Weight
1. When the value of 25H is written to 1 and the weight value is 16-bit display, the current 16-bit weight value
(10H) is read as the weight value of the leather weight, and the weight value is read as the weight value of the
leather weight; when stored in 18H and the weight value is 32-bit display, the current 32-bit weight value (16H
17H) is read as the weight value of the leather weight, and stored in 18H and 19H.
2. 18H, 19H store the skin weight value.
3. Enable control settings. It is controlled by Bit1 bit of 1AH. Bit1 = 0 - Gross weight, Bit1 = 1 - net weight.
Switching the current display weight to gross or net weight, the calculation uses the value of 18H (16
bits)/18H19H (32 bits) as the tare weight.
Value is written
to 18H as tare
Write 1 to 25
IAH Bit1=1
IAH Bit1=0 Current gross weight, gross
weight = real weight
Current net weight, net weight
= real weight - gross weight