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DS-425 Service Manual --- V1.04

5. Hardware Specification

5.1. Main Components

•

Microcomputer: ATMAL AT89C52 8 bit

•

LCD Display Driver: NEC uPA7225G

•

A/D Board: STB-0054, (FOR DS-422), New A/D Cover.

5.2. Block Diagram

A/D BLOCK

STB-0054-3

LOADCELL BLOCK

INTERNAL

MAIN BOARD BLOCK

STB-0052-4

(WITH OPERATE DISPLAY)

POWER

BLK AX

5.3. Electronic Connection Diagram

RS-232

Interface

Operator Display

Display Driver

Keyboard

Main CPU AT89C52 (MCS51)

A/D Block

STB-0052-3

Scale

Internal Block

Interface

Driver

Power

Block

AC Input

05 Hardware Specification Page No. 19

Summary of Contents for DS-425

Page 1: ... 1998 2nd December 1998 3rd April 2001 4th January 2002 Shanghai Teraoka Electronic Co Ltd Technical Service Dept Ting Lin Industrial Development Zone Jin Shan District Shanghai P R China 201505 Tel 86 21 5723 4888 Fax 86 21 5723 9330 E mail steservice digi scale com ...

Page 2: ...unt and A D Count Display 8 2 8 Specification List V1 04 8 2 9 System Display Information 10 3 Main Operation 3 1 System On 11 3 2 One Touch Tare 11 3 3 Digital Tare Operation 11 3 4 Gross Net Display Toggle 12 3 5 Weight Unit Conversion 12 3 6 Counting Operation 12 3 7 Set Point Setting 13 3 8 Set Point Alarm Function 14 4 RS 232C Protocol 4 1 Communication Specs 16 4 2 Communication Text Command...

Page 3: ...DS 425 Service Manual 1 General Specification 1 1 Overall Dimension 1 2 Display Panel 01 General Specification Page No 1 ...

Page 4: ...PCS Interface RS 232 OPTIONAL Load cell 300g K Type 600g 30Kg N Type Mechanical Detail Housing DS 425W DS 422 Keyboard Physical Dimension L 321 W 256 H 80 mm Platter Size 105mm x 160mm 300g 205mm x 250mm 600g Upwards 1 4 Operation Condition Power Source AC 220V 10 15 50HZ 60HZ Factory Set Temperature 0 C to 40 C Humidity 85 RH Microcomputer Atmal AT89C52 8bit Display Device Liquid Crystal Display ...

Page 5: ...de Enter Used for storing the data Shift Used to change digital position INC 1 Used for increase data value when digit blinking 2 Switch the weight unit 1 6 2 Display a Layout b Indicators Indicator Function 0 Light when display is zero and stable NET Light when displays net weight Light when weight is stable U C Light when working in counting mode SAF Set point ALAME Mode is ON and during Fill Ap...

Page 6: ...ight display Excute tare Tare 0 0000 kg B B Net display Load more weighing 1 0000 kg B B Remove all items 1 2220 kg B B B Minus tare weight Tare clear Tare 0 0000 kg B B Weighing mode Note This operation is based on No Auto TARE CLEAR SPEC10 BIT1 0 3 3 Digital Tare Operation Indication Flag B Bright S Sparkling 1 ZERO 2 NET 3 STD 4 U C 5 SAF 6 SAC 7 S1 8 S2 9 S3 10 S4 Indicator Operation Key Weigh...

Page 7: ... 6 SAC 7 S1 8 S2 9 S3 10 S4 Indicator Operation Key Weight 1 2 3 4 5 6 7 8 9 10 Remarks Weight Stable 0 0000 k g B B Weighing mode Load weight eg 0 6000kg 0 6000 k g B Convert INC 1 3225 lb B Pound display Convert INC 21 165 o z B Ounce display Convert INC 0 6000 k g B Basic unit display Remove items 0 0000 k g B B Weighing Mode Note This operation is available when SPEC15 0100 or 1100 only 3 6 Co...

Page 8: ... as point 1 setting 2 Confirm Enter SET 3 kg Point 2 saved 3 Confirm Enter 0 0000 kg B Set value 3 Value Change Shift INC 0 0100 kg B Same procedure as point 1 2 setting 3 Confirm Enter SET 4 kg Point 3 saved 4 Confirm Enter 0 0000 kg B Set value 4 Value change Shift INC 0 0100 kg B Same method as above 4 Confirm Enter 0 0000 kg B B Point 4 saved and back to weighing mode 4 Note 1 The indicators S...

Page 9: ... Target Zero Set point 1 Set point 2 Set point 3 Set point 4 Full Span Note continuous slow alarm continuous fast alarm 3 8 2 Weight Check Method Operator places item on the platter and check confirm whether the weight of the item is within allowable error range Basically the allowable error range can be defined via the setting of 2 set points For example set point 2 and set point 3 And also you c...

Page 10: ...0150 kg B B B Fast alarm start Load 0 0150kg 0 0300 kg B B B B Slow alarm start Load 0 0150kg 0 0450 kg B B B B B Fast alarm start Load 0 0150kg 0 0600 kg B B B B B B Alarm off Remove all item 0 0000 kg B B B Press Enter Enter 0 0000 kg B B B Weight check method Load 0 0150kg 0 0150 kg B B B Fast alarm start Load 0 0150kg 0 0300 kg B B B B B Slow alarm start Load 0 0150kg 0 0450 kg B B B B B B Fas...

Page 11: ...ion setting Header Code Selection SPEC02 Bit 0 Weight Stability Selection SPEC02 Bit 1 4 3 1 Without header code and weight stable code Total 17 Bytes Net Weight CR Tare Weight CR LF 7 Byte 1byte 7 Byte 1 Byte 1 Byte 4 3 2 Without header code and with weight stable code Total 19 Bytes Stable status CR Net Weight CR Tare Weight CR LF 1 Byte 1 Byte 7 Byte 1byte 7 Byte 1 Byte 1 Byte 4 3 3 With header...

Page 12: ... Note4 By specification setting the decimal point can be set to period 2EH or comma 2CH 4 4 Communication Method Communication method can be set as Stream Output Manual and Command 4 4 1 Stream Output Continuously Output Data will output to PC side continuously Please also define the contents of data on SPEC 03 bit 0 1 is not effective 4 4 2 Manual Command Data will output when key pressed user ma...

Page 13: ...uest signal the weight data will be transferred immediately or hold the command till weight stable If weight cannot be stable within the certain interval set by specification DS 425 will transmit NAK 15H to PC Note If ACK signal is sent to DS 425 during digital tare or re zero operation NAK signal will be sent to PC PC Side DS 425 ACK No Weighing Mode Yes Yes NAK Yes X Seconds Stable NAK Data No N...

Page 14: ...New A D Cover 5 2 Block Diagram A D BLOCK STB 0054 3 LOADCELL BLOCK INTERNAL MAIN BOARD BLOCK STB 0052 4 WITH OPERATE DISPLAY POWER BLK AX 5 3 Electronic Connection Diagram RS 232 Interface Operator Display Display Driver Keyboard Main CPU AT89C52 MCS51 A D Block STB 0052 3 Scale Internal Block Interface Driver Power Block AC Input 05 Hardware Specification Page No 19 ...

Page 15: ...DS 425 Service Manual V1 04 5 4 Circuitry Diagram Please See Attached Pages for DS 425 Circuitry Diagram Technical Service Dept Shanghai Teraoka Electronic Co Ltd 05 Hardware Specification Page No 20 ...

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