Sewhacnm SI 460A User manual

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Digital Weighing Indicator
SI 460A
User Manual
2014.06.13

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SI 460A DIN SIZE WEIGHING INDICATOR
CONTENTS
1. Before Installation
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3 Page
2. Introduction
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4 Page
3. Specification
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5 Page
3-1. Specification
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5 Page
3-2. Front Panel
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6 Page
3-3. Rear Panel
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8 Page
4. Installation
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9 Page
4-1. Dimension & Cutting Size
4-2. Installation Components
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9 Page
9 Page
4-3. Load Cell Installation
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10 Page
5. Set-up
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11 Page
5-1 TEST Weight Calibration Mode
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11 Page
5-2. Simulating Calibration Mode
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13 Page
5-3. F-FUNCTION Setting
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20 Page
5-4. Test Mode
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27 Page
6. Interface
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28 Page
6-1. Serial Interface
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28 Page
6-2. Analog Output Interface(4~20mA)
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31 Page
6-3. Analog Output Interface(0~10V)
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32 Page
6-4. Serial Print
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33 Page
7. Error & Treatment
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36 Page
Warrantee Certificate
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39 Page

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SI 460A DIN SIZE WEIGHING INDICATOR
1. BEFORE INSTALLATION
Caution / Warning Marks
This mark warns the possibility to arrive death or serious injury
in case of wrongly used.
This mark cautions the possibility to arrive serious human body
injury or product lose in case of wrongly used.
Copy Rights
1. All Right and Authority for this Manual is belonged to SEWHA CNM CO., LTD.
2. Any kinds of copy or distribution without permission of SEWHA CNM CO., LTD. will be
prohibited.
3. This manual may be changed as the version is upgraded, without previous notice.
Inquiries
If you have any kinds of inquiries for this model, please contact your local agent or Head Office.
Head Office : SEWHACNM CO., LTD.
Website : http://www.sewhacnm.co.kr
Email : [e-mail]

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SI 460A DIN SIZE WEIGHING INDICATOR
2. INTRODUCTION
2-1. Introduction
Thank you for your choice of this SI 460A Industrial Digital Weighing Indicator.
This SI 460A model is high-performance weighing Indicator.
Please review and learn this instruction Manual and enjoy your process efficiency
with “SI 460A”Weighing Indicator.
2-2. Cautions
1. Don’t drop on the ground and avoid serious external damage on item.
2. Don’t install under sunshine or heavy vibrated condition.
3. Don’t install place where high voltage or heavy electric noise condition.
4. When you connect with other devices, please turn off the power of item.
5. Avoid from water damage.
6. For the improvement of function or performance, we can change item specification without
previous notice or permission.
7. Item’s performance will be up-dated continuously base on previous version’s performance.
2-3. Features
1. SI 460A model is the square DIN SIZE and compact enough, so it is easy to install.
2. Front panel is covered with Polycarbonate film, strong against dust and water.
3. RS422, RS485 serial interface and Modbus(RTU) is standard installed.
4. User can choose various options ; 4-20mA, 0-10V, RS232C and Extra RS422, RS485.

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SI 460A DIN SIZE WEIGHING INDICATOR
3. SPECIFICATION
3-1 Specification
Content
Specification
Performance
External Resolution
1/20,000
Internal Resolution
1/2,000,000 (±1,000,000)
Input Sensitivity
Min 0.1µV/V
Max Signal Input Voltage
3.0mV/V
Load cell Excitation
DC +5V
A/D Conversion Method
Sigma-Delta
Decimal Point
0, 0.0, 0.00, 0.000
Drift
Offset
10PPM/℃
Span
10PPM/℃
Linearity
0.001% of Full Scale
Analogue Sampling(sec)
Max 60times / sec
Environment
Operating Temperature Range
-10℃ ~ +40℃ [14℉ ~ 104℉]
Operation Humidity Range
40% ~ 85% RH, Non-condensing
Function
Calibration Mode
Test Weight Calibration Mode
Simulation Calibration Mode
Display
6 digit, 15.24mm(0.6inch)
Red Color FND
Key Pad
5EA Standard Key pad
Additional Digital Input
4pcs external input key addable
Communi-
cation
Standard Serial Interface
(RS-422/485)
Data Transference
Command Mode
Serial Printer Mode
Modbus (RTU)
Option Serial Interface
(RS-232C)
Data Transference
Command Mode
Serial Printer Mode
Analog Output (Option)
0~10V, 4~20mA (Selectable)
Power
DC : 24V, Power Consumption 12W
AC (Option) : 110~220V, Power Consumption 12W
Size
96mm(W)ⅹ96mm(H)ⅹ116mm(D)
Weight : 500g (DC)
700g (AC.)

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SI 460A DIN SIZE WEIGHING INDICATOR
3-2. Front Panel
3-2-1 Front Panel (Display / Key Pad)
3-2-2. State Lamp
STEADY
When the weight is stable, ON.
ZERO
When the current weight is under zero range, ON.
TARE
When “TARE”function is set, ON.
HOLD
When “HOLD”function is set, ON.
TxD
When the Indicator transmits Serial communication data (Print data),
Lamp is ON.
RxD
When the Indicator receives Serial communication data, Lamp is ON.
3-2-3. Key Operation
1. Make weight value to Zero.
2. Cancel or ESC.
1. Set the TARE Function
1st input : “TARE”, 2nd input : “TARE Reset”
(When “HOLD”or weight value is ZERO, then this key doesn’t work.)
2. Moving the cursor to left.

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SI 460A DIN SIZE WEIGHING INDICATOR
1. Set the “HOLD”Function
1st input : “HOLD”, 2nd input : “HOLD Reset”
※When HOLD is on, “H”mark will be shown at the display.
2. Moving the cursor to right.
3. Under “SETUP”Mode, Enter to “Calibration”Mode.
1. Print out
2. Increase the value
3. F-Function setting : Increase set value
4. Saving weight date under F-function 103-0 or 2.
1. Press this key 4times, within 2secs, enter “SET-UP”mode.
2. F-Function setting : Save the value go to next step
3.Test Mode 1 : Standard serial interface test mode
4. Set-up Mode : Set point setting Mode.
●Setup Mode :It is a mode can SET-UP the calibration, Function of SI 460A .(refer to CH5. SET-
UP)
3-2-4. Hot key (with F key)
Continuous “TARE”setting
(From the second TARE setting, use this key)
If the Printer is installed,
You can print out the “Grand-total data”.
(GRAND-total data can be checked though Print output).
Max accumulated weighing count : 999,999times
Over 999,999times return to “0” time
Max accumulated weight display : 999999999 (g, kg, ton)
Over 999,999,999 (g, kg, ton) return to “0” (g, kg, ton)

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SI 460A DIN SIZE WEIGHING INDICATOR
3-3 Rear Panel
1. Power DC IN: 24V (Power: 24V 1A recommended)
2. External Input terminal: Refer F-Function 231~234 to select each function.
3. Serial Interface terminal
Communication Method
TX+ Terminal
TX- Terminal
RX+ Terminal
RX- Terminal
RS –422(Standard)
TxD+
TxD-
RxD+
RxD-
RS –485(Standard)
Not used
Not used
RxD +
RxD-
4. Load cell Input
EXC+
EXC-
SIG+
SIG-
SHIELD
5. Analogue Output terminal (Option)
4~20mA (Factory Default)
(+)
(-)
0~10V (Selectable)
(+)
(-)
6. Option Serial Interface terminal (port No.2 top side)
Communication
1(from left)
2
3
4
RS –232C
GND
GND
TxD
RxD
RS –422
TxD+
TxD-
RxD+
RxD-
RS –485
Not used
Not used
RTxD+
RTxD-
Please check the Comm. and other specification in the label, attached on the
cover plate first, and make connection according to that information.

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SI 460A DIN SIZE WEIGHING INDICATOR
4. INSTALLATION
4-1. External Dimension & Cutting Size
4-2. Installation Components
SI 460A
User Manual
External Dimension (Unit : mm)
Cutting Size (Unit : mm)

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SI 460A DIN SIZE WEIGHING INDICATOR
4-3 Load cell Installation
Load Cell Wire Connection (In case of SEWHACNM’s Load cell)
It depends on the manufacturer of load cell, please check the specification.
※Load cell wire color can be changed without prior notice.
Under Set-up the Load cell, if EXC+ and EXC- have a short circuit,
It may cause damage in the indicator.(specially analogue board)
If you connect other wires to Load cell terminal wrongly, it may cause
damage in the analogue board.
Before connecting the load cell cable you have to power off and be sure to
connect the cable to the terminal correctly.
Do not weld near the load cells , Indicators or other devices.
Load Cell Installation
1. You can connect Max 8pcs of same capacity Load cells at once. (350 Ω)
2. You have to make horizontal balance on the ground.
3. If you install more than 2pcs of load cells, use Summing box and adjust output signal
difference as minimum. It can make wrong weighing process caused by each load cell’s
variation.
4. If there is some temperature difference around Load cell, it can cause wrong weight
measurement.
5. Don’t do Welding job or Arc discharge around installation place. But, there is no
choice, please disconnect power cable and Load cell cable.
If you measure static electricity material, please make earth between down part and up
part of Load cell.
-----Sewhacnm Co.,ltd. Load cell & wire color----
-

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SI 460A DIN SIZE WEIGHING INDICATOR
5. SET-UP
5-1. SET-UP Mode
5-1-1. Enter to SET-UP Mode
Press key 4 times.
If “SETUP”is displayed, SET-UP mode is ON.
Shortcut
F-function Mode
Press key 4 times 
Test Mode 1
Analog
Variation Value
Press key 4 times 
Display
Press key 4 times 
Key
Press key 4 times 
Analog Output
Press key 4 times 
Test Mode 2
External Input
Press key 4 times 
Serial I/F
Press key 4 times ?
Serial I/F (Option
Port)
Press key 4 times ?
key for Cancle / Back, key for Save.
6.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-2. Test Weight Calibration Mode
5-2-1. Calibration
Adjust weight balance between “Real weight” on the load cell(Weight Part) and
“Displayed weight of Indicator”. When you replace LOAD CELL or Indicator, you
have to Calibrate process once again.
(When you start calibration mode, TARE, HOLD & PRINT will be reset.)
Before processing calibration, please warm up the indicator during 15 min to
guarantee more preciseness.
Calibration Key Operation
CANCLE/BACK
Move to left
Move to right
Increase set
value
Save and Move
to next step
5-2-2. Start Test Weight Calibration Mode
Remove “CAL-BOLT” on the Front panel, .
and press “CAL - LOCK S/W” inside.
When “CALIBR”displays, press key,
Then Test Weight Calibration Mode starts.
※If you set password through “F95”, you have to input the pass word.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-2-3. Setting “Capacity of weighing Scale”
After displaying “CAPA”, input max capacity with keys & Press key to save & move
to next step.
If you want to set Max capacity as 1,000kg and the division is
0.1 (100g), then just input “1000”.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-2-4. “Decimal Point”and “Digit / Division”Value
After “DIVI”is displayed select Decimal point with key.
Whenever pressing key , decimal point will be changed.
Please stop at the optimal position. And select Division optimal division with key.
Finally press key to save and move to next step.
Max decimal point will be 0.001, and digit can be selected among 1, 2, 5, 10, 20,
50. Digit and decimal point must be fulfilled under the below condition.
- (division value / Max capacity value) cannot be over 1/20,000.
If this condition is not fulfilled, “err-1”will be displayed and move back to capacity
setting mode.
5-2-5. Measuring the “DEAD”Weight of Weighing Scale.
When “DEAD”displays, Press key, then indicator will calculate dead weight of
scale part automatically (While this process, there should be nothing on the scale part.)

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SI 460A DIN SIZE WEIGHING INDICATOR
Indicator will search “DEAE weight”during
10~20 secs automatically to find the best
condition.
※Over than 1/10,000 resolution setting,
To guarantee the preciseness, DEAD weight calculation (CAL00~CAL09) will be operated
twice.
In this step, if there is unstable condition such as some forces or Vibration on the
scale part, “ErrorA”will be displayed, and “DEAD value”will not be calculated.
Please remove the cause of the force or vibration and process it again.
5-2-6. Calculating span value
If “SPAN”is displayed, input the weight of your “Test Weight”and press key.

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SI 460A DIN SIZE WEIGHING INDICATOR
If “UP”is displayed, please load “Test Weight”on the scale part and press
key.
※Over than 1/10,000 resolution setting,
To guarantee the preciseness, Span calculation will be operated twice.
After calculation, span value will be
displayed on the display. Then press
key.
※This span value is not a weight value.
When “CALEND”is displayed and
calibration is completed.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-3. Simulation Calibration Mode(Calibrate without Test weight)
With this “Simulation Calibration Mode”you can make simple calibration without any
“TEST weight”This calibration mode uses “Load cells’max capacity”and “Max Output
Rate(mV)”, so the weight adjustment degree might be less than “Test weight Calibration”.
The guaranteed resolution of this “Simulation Calibration”is 1/3,000.
5-3-1. Simulation Calibration Mode Start
Remove “CAL-BOLT” on the Front panel,
and press “CAL - LOCK S/W” inside.
When “CALIBR”is displayed, press
key.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-3-2. Setting “Capacity of Load Cell”
After “CAPA”displayed, Check Max Capacity of Load cell.
(refer the load cell label, or Test Report)
Input the Max Capacity of Load cell. And press key.
In case of multiple pieces of load cells are installed, Please make sum of each load
cell’s capacity and make setting with Max Capacity.
EX) There are 4pcs of load cells, and each load cell’s Max capacity is1,000kg.
Then, total Max Capacity will be 4,000kg(1,000 x 4) and you have to input 4,000.

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SI 460A DIN SIZE WEIGHING INDICATOR
5-3-3. Setting “Digit / Division”value
After “DIVI”is displayed select Decimal point with key.
Whenever pressing key, decimal point will be changed.
Please stop at the optimal position. And select Division optimal division with
key.
Finally press key to save and move to next step.
5-3-4. Measuring the “DEAD Weight”of Weighing Scale.
When “DEAD”displays, Press key, then indicator will calculate dead weight
of scale part automatically.
(While this process, there should be nothing on the scale part.)

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SI 460A DIN SIZE WEIGHING INDICATOR
It takes 10secs or 20secs to find the
best condition.
Over than 1/10,000 resolution setting,
To guarantee the preciseness, dead weight calculation will be operated twice.
5-3-5. Inputting Max Output ( Rated Output Voltage / mV)
Input the output value of load cell.
After “mV”displayed, Check the Rated output value of Load cell.
(Refer to the load cell label, or Test Report) . And Press key to save and move to
next step.