Model 915 Indicator Service Manual
Contents
1. Pi2 Qa lel Dp uis 5 0265 16 vis ind Uis R5 4 27 ijs 2 Z E BH 247 RP 7 a 46 04 1 B us 9 8707 er 1 8 oe 8858 u2 9 e ieng 6 1 Boece EP DA RNS 1 e B A A S s decker R38 CRI 04 9 ee 221 RI CRI T_RN3 R36 ON UN I CI Qu BI RES i CRO CREE bB ute E RP es E Ul o 4 63 4 CIS C36 GIG y El eg go CRUS B eire 63 B 28 cn2. MEMORY MOTION TOTAL cross lt AUTO lt ke 2 AD C 111213 ID TARE 41516 RM GIN 7 8 9 M M OFF Mas 0 ua PRINT Si 5 WEIGH TRONIX MODEL 915 FRONT VIEW RD912 RS232 9 OUTPUT FEMALE gt OPTIONAL RD912 RS232 OUTPUT 420 FEMALE J20 D e BOTTOM VIEW LOWER PANEL 13 4 WEIGH BAR 5 PIN CONN RS232 PANEL SHOWN NA SID 915enc MODEL 915 INDICATOR 12VDC PARTS amp ASSEMBLY ITEM NO DESCRIPTION W TP N QTY 1 Mounting Bracket 11899 0043 1 2 Rubber Mount 17807 0058 4 3 Neoprene Washer 27357 0010 4 4 Enclosure 47017 0010 1 5 DisplayBoardAssy 47686 0010 1 6 Main Pc Board 47683 0039 1 Main Pc Board W Rs 232 47683 0047 1 7 Remote Zero Receiver Kit Optional 51762 0019 1 8 Bezel 21356 0014 1 9 Screw 10 32 X 751 18087 0073 12 10 Keypad Ass y 47698 0057 1 11 Alarm Light Ass y 24129 0014 1 12 Screw 10 32 X 31 L 14473 0348 8 13 Plastic Cap Threaded 15351 0029 1 14 XM
3. TO PS MAIN PC BD 1 2 4 5 6 7 8 9 1 1 1 1 1 lt lt 1 dre x PWR RETURN 1 DI gt LOGIC GND LOGIC GND XMIT DATA REC DATA REMOTE ZERO DATA 1 F gt DISPL CLK F gt REMOTE PRINT DATA 2C DTR CHASSIS GND DISP AY UR RS232 NNE CABLE C R P N 27639 0044 1 7 C P N 28931 0039 R NN 55 19572 0057 42 DC PWR IN AL ARM HORN OR LIGHT D REMOTE ZERO RECEIVER J14 BD ASSY P N 51763 0018 PWR ALARM CONN CABLE ASSY Cio 21450 0027 RS232 REMOTE DISPLAY CABLE CUNN ASSY P N 27639 0044 REM or RS232 0051 amp RS232 gt D Pz E Ji PO MALIN BEAR DAS Sy 4769920089 REMOTE 4 CHANNEL D RECEIVER 5 5 5 P N 51576 0015 lt lt mE E EET EC X LIM UX CA gt 3 e 1 PSI 123456 ALARM LIGHT ASSY gt 24129 0014 4 WEIGH BAR CA CONN ASSY FIRI pi gt H P N P N 21555 0054 4 PIN D J16 21
4. UNLESS OTHERWISE INSTRUCTED Y Press MENU key to scroll in the menu and to loop back to the first BAUD BUSY LAYOUT ASCII Press MENU item in that row Y Press SELECT key to move in the menu OFF gt ON 5 gt 2 Viewer enter ASCII DISABLED 9 ENABLED string header Press G N to return to gross weighing mode Y 300 gt 600 1200 2400 4800 9600 denotes changes additions from 1015 Configuration denotes default Configuration Mode In this mode you will key in a four or five digit Configuration Code to pro gram the following operational parameters Represented by Calibration Size 1st and 2nd digits Capacity x Increment Size 3rd digit N A 4th digit Units of Measure 5 digit Instructions in this section include Viewing a Current Configuration Code Entering a New Configuration Code Configuring Custom Sensitivity with Capacity x Increment Size Setting Custom Sensitivity and Capacity Row Numbers Setting Custom Capacity Level Model 915 Indicator Service Manual Viewing Current Configuration Code Entering a New Configuration Code If you want custom configuration start with 19XXX Key in 915 Press hidden E key and hold for two seconds Press SELECT Press SELECT Press SELECT Press G N to return to corresponding operation mode Determine an appropriate
5. a avi 855 deu u E Sela HERES RB H E60 555 O 111 gem ms Dea B SE 6 18271 2 6 sel 6 2 UUTT TITTI Main Printed Circuit Card 47683 0039 0047 Component Side This printed circuit card contains the Power Supply Analog To Digital Circuitry Microprocessor Circuitry RS 232 Serial Circuitry Dnruareiunnh This indicator which is energized by 10 to 18 vdc in reference to a NEGA Power Supply TIVE GROUND utilizes two five amp fuses mounted on the bottom of the chassis for current protection Systems with a positive ground are modified by cutting jumpers from E1 to E2 and ES to E6 Then install jumpers from E2 to and E1 to E6 The circuit card receives power from the fuse at P2 and is protected against high voltage transients with varistor RV1 Input voltage is monitored by 16 volt zener diode VR2 If the voltage across VR2 exceeds 16 vdc Q3 will turn holding the power circuitry in the To prevent the unit from turning OFF condition In addition if the input voltage drops below 8 volts DC PA7 off below 8 volts remove CR5 disables the power circuitry by outputting a low signal and C36 when configured this A Power On command is generated when the ON key is pressed This way the unit wi to the turns Q5 on and provides a low signal to 8v regulator
6. gt Numbers 0 1 2 3 4 5 o OIPI PON gt X X X X X X x N A 0 9 are all acceptable as this is an unused parameter 0 1 2 3 4 5 6 T 8 9 UNITS 0 Ib 1 Ib 2 kg 3 kg 5 1 5 1 is the Configuration Code number representing selections cited in USING Table 1 CONFIGURATION CODE EXAMPLE 2345 are place numbers for each digit in Configuration Code Calibration size determines Weigh Bar sensitivity in mV V Refer to Table 3 to relate axle sizes to exact sensitivity values Multiply by 1000 physical size of your Weigh Bar equals 5 8 or 1 but differs from its identifying calibration size see text Calibration Diameter Dual Platform Eight 350 ohm Weigh Bars and junction box with span pots Dual double ended Weigh Bar Model 915 Indicator Service Manual 9 2 Valid Numbers for the Configuration Code PARAMETERS VALID FS INVALID S Calibration Size 14 17 Capacity x Increment Size Any number greater than 5 will be recognized as a 5 Any number greater than 3 will be recognized as a 3 Table 3 Model 915 Calibration Table Calibration Scale Number of Size Capacity Weigh Bars Calibration 5 8 20016 180 039 14 2 000 Ib 1 631 03 1 1 4 2 000 Ib 1 742 58 Alley Weigh 2 000 Ib 1 913 8 1 7 8 20 000 Ib 17 965 8 2 20 000 Ib 19 143 8 2 1 8 20 000 Ib 18 310 3 2 1 4 20 000 Ib 18 003 9 2 1 4 20 000 Ib 18 003 9 2 1 2 20 000 Ib 18 811 4 2 1 4
7. 200 000 Ib 90 019 3 2 1 4 D P 200 000 Ib 186 816 0 3 1 8 200 000 Ib 126 402 0 4 200 000 Ib 181 152 0 20 200 000 Ib 3 109 940 0 Factory Calibration 20 000 Ib 20 000 0 Pp If physical size of your Weigh Bar equals 5 8 1 but differs from its identifying calibration size see previous text CALIBRATION DIAMETER is Dual Platform Eight 350 Weigh Bars and junction box with span pots is Dual double ended Weigh Bar 10 Model 915 Indicator Service Manual Configuring Custom Sensitivity with Capacity x Increment Size YOU MAY EXIT this procedure from any main menu display by pressing the G N key This procedure allows you to select a weight transducer sensitivity rating other than those referenced by calibration diameter in Table 1 You may even configure another manufacturer s weight transducer for interface with the Model 915 Before starting the keying procedure for custom configura tion you must verify three facts about your interfaced transducer s e Trade name of transducer Sensitivity of transducer Capacity x Increment Size of transducer Trade Name Of Transducer To configure custom sensitivity for Weigh Tronix Weigh Bars continue now to the next topic SENSITIVITY To configure for transducers from manufacturers other than Weigh Tronix refer now to instructions located in PROGRAMMING APPENDIX Then if you find that custom configuration of sensitivity is
8. tr WEIGH TRONIX SCALES FOR AGRIBUSINESS Model 915 Indicator Service Manual Table of Contents Programming dd ina 5 The ali EA m e eleme li 5 915 Configuration Menu 55 4555 6 Configuration sete 6 Viewing Current Configuration Code sse 7 Entering A New Configuration Code 7 Calibration Diameter einiino rendre diia 8 Using Table 1 Configuration Code Example 8 Table 1 Configuration Code Chart eee 9 Table 2 Valid Numbers For Configuration 10 Table 3 Model 915 Calibration Table ona 10 Configuring Custom Sensitivity With Capacity x Increment Size 11 Table 4 Row Numbers For Custom Capacity x Increment Size 12 Setting Custom Sensitivity and Capacity Row 12 Setting Custom Capacity 13 Calibration dde esed eid e eed dde edd E a 14 Calibrating Using A Known Weight 14 Getting Ready To Calibrate With BLH Model 625 Calibrator 15 Table 5 Calibrator Connections And Calibration Tables 15 Calibrating With A BLH Model 625 2 15 Internal Raw Counts Mode deemed esed ape 17
9. Configuration Code number from chart in Table Key in 915 Press hidden E key and hold for two seconds Press SELECT Press Key in new configuration code Press SELECT Press G N to return to corresponding operational mode Model 915 Indicator Service Manual 915 is displayed 915 E is displayed Conf is displayed Current Configuration is displayed Conf is displayed 915 is displayed 915 E is displayed ConF is displayed Current configuration code is displayed ConF is redisplayed Calibration Diameter Using Table 1 Configuration Code Example Refer to Table 1 on following page Physical size and calibration size are not the same for some Weigh Bars If your Weigh Bar physically measures 5 8 in diameter but is marked with a calibration size of 2 1 4 D Dual then use data shown in Table 1 for a 5 8 bar If your Weigh Bar measures 1 in diameter but is marked with a calibra tion size of 2 1 8 use data shown in Table 1 for a 1 bar For Weigh Bars or weight transducers which have a physical size of either 5 8 or 1 but which have a calibration size other than 2 1 4 D or 2 1 8 respectively select Custom Sensitivity and Capacity x Increment in Table 1 For all other Weigh Bars or weight transducers if physical size and calibra tion size of a bar do not match use the calibration size for Table 1 Table 1 shows you how selections shown for these parameters would be
10. Key in 915 Press hidden E key and hold for two seconds Press SELECT Press MENU repeatedly until SPAn is displayed Press SELECT Model 915 Indicator Service Manual Calibration Tables Use W T Spec P N 24375 Model 915 Calibration Tables Use W T Spec P N 14599 Farm Scale Calibration Tables Use W T Spec P N 24375 Model 915 Calibration Tables 915 is displayed 915 E is displayed Conf is displayed Zero value should be displayed before you continue If re zeroing is necessary press ZERO CLEAR 15 10 11 Turn Calibrator dial to highest mV V setting for this system as determined in Step 2 of Getting Ready to Calibrate with BLH Display represents gross weight prior to calibration Adjust span using numeric keys as shown until weight display equals weight value known in Calibration Table for highest mV V setting Span is adjustable to 10 Press 1 2 or 3 to increase span Press 7 8 or 9 to decrease span Press 4 5 6 to return span to factory calibrated value Calibration is completed Press SELECT SPAnis displayed Press MENU to advance or press G N to return to corresponding operational mode Model 915 Indicator Service Manual Internal Raw Counts Mode Use this mode to access Internal Raw Counts display Internal Raw Counts value is useful in two ways Viewing Internal Raw Counts Display A B 5 In troubleshooting to veri
11. The Hidden E key is located between the 9 key and the M key 915 Configuration Menu Gross Key security code 915 Press and hold the hidden key until 4 You must hold in the MENU key to access these items gt gt OVER CAP gt SPAN INTR gt AZT STABLE gt FILTER UPDATE INPUT I INPUT 2 canna TH View or Set View or View internal enter ZERO gt G N J A RECALL J A gt 5 PRINT 266 adjust span raw counts configuration an Y level code ZERO G N H gt gt A gt A PLUS PRINT 01 gt 02 05 Y Press MENU NOR gt INTER 9 HIGH OUTPUT CAP 00 gt 05 gt 10 20 30 H gt 50 100 SettingOisthe _ same as deactive View or View or Y ae m for these items enter enter 0 0 0 5 gt 10 2 0 3 0 50 10 0 4 7 ai AE RIS ETA sensitivity capacity row
12. Viewing Internal Raw Counts 2 17 Auto Zero Tracking Selection 18 Setting Motion Stability Window emen 19 Setting Fiter Selection cinco ete i 20 Setting Update Selection oett ete 20 Configuring Input 1 and 2 21 Setting Serial Functioris deett ea ha E eee e d Da eee ee ced 22 Baud Rates ich ra ie epos 22 Busy Display sz nt e n de dite tb tus 22 AUTORI eiit rerit duree idera ndo ila liane 23 ENQUIFS P 24 ad 24 mm 25 Pages numbered consecutively beginning with the cover page Model 915 Indicator Service Manual 3 Table 6 ASCII Control Ee eere be 27 Printing Out the Configuration Parameters 28 Circuit Descriptions 29 Power SUP DIY M Pm 29 Analog to Digital Circuitry seem nennen 30 Microprocessor Circuitry enne nennen 31 Display card Creu O 32 RS5 232 Serlal CIECUIEV anna nr 32 Optional RS 232 or Remote 32 To Install Remote Receiver i iii 32 Model 915 Master Reset 33 Programming Appendix d Lise us ada Prec band Hist tu tam literas 34 Configuration For Eaton D Sta
13. represented by a Configuration Code of 5151 CONFIGURATION CODE EXAMPLE Parameter Represented b Selection Calibration Dia 2nd digit Capacity X Increment Size 3rd digit N A 4th digit Units of Measure 5th digit CODE 5151 uses 2nd 3rd 4th and 5th of five available digits Model 915 Indicator Service Manual Table 1 Configuration Code Chart CALIBRATION SIZE CAPACITY x INCREMENT SIZE 5 8 200 x 0 02 200 x 0 05 2K x 0 1 2K x 0 2 2K x 0 5 2K 2K x 0 2 2K x 0 5 20K x 1 20K x 2 20K x 5 1 1 4 2K 2K x 0 2 2K x 0 5 20K x 1 20K x2 20K x5 1 7 8 20K 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 2 20K 20K x 20K x 5 200K x 10 200K x 20 200K x 50 2 1 8 20K 20K x 20K x 5 200K x 10 200K x 20 200K x 50 2 1 4 20K 20K x 20K x 5 200K x 10 200K x 20 200K x 50 2 1 4 D 20K 20K x 20K x 5 200K x 10 200K x 20 200K x 50 2 1 4 D P 200K 200K x 20 200K x 50 200K x 100 200K x 200 200K x 500 2 1 2 20K 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 3 1 8 200K 200K x 20 200K x 50 200K x 100 200K x 200 200K x 500 4 200K x 200K x 20 200K x 50 200K x 100 200K x 200 200K x 500 20 20K x 1 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 Alley Weigh 2K x 0 1 2K x 0 2 2K x 0 5 20K x1 20K x 2 20K x 5 Factory Cal 20K x 1 20K x 2 20K x 5 200K x 15 200K x 20 200K x 50 Custom Sensitivity and Capacity x Increment See text Configuring Custom Sensitivity with Capacity x Increment Size Column Cad Gr
14. 0 5 0 and 10 0 Use this section to enable the appropriate division size factory default Enabling Azt 1 Key in 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT ConF is displayed Press MENU repeatedly until AZt is displayed Press SELECT Press MENU repeatedly until desired AZT setting is displayed Press SELECT AZT is now enabled Press MENU key to advance or press G N key to return to corresponding operational mode Model 915 Indicator Service Manual Setting Motion Stability Window Disabling the Motion Stability Window YOU MAY EXIT this procedure from any main menu display by pressing the G N key Enabling the Motion Stability Window This option lets you set the size of the motion detection window in divisions This section explains how to disable this option if necessary 1 915 915 is displayed 2 Press hidden E key and hold for two seconds 915 E is displayed 3 Press SELECT ConF is displayed 4 Press MENU repeatedly until SIADIE is displayed 5 Press SELECT 6 Press MENU repeatedly until 0 0 is displayed 7 Press SELECT Motion stability is now disabled Selections of motion detection are 0 5 1 0 2 0 3 0 5 0 and 10 0 divi sions Use this section to enable the appropriate division factory default 1 Keyin 915 915 is displayed 2 Press hidden E key and hold for two seconds 915 Eis displ
15. 07 enable previous mode if it loses input When the power is turned off the Q5 turns off the Q4 turns on and a high signal disables 07 the 8 regulator and turns it Model 915 Indicator Service Manual 29 Analog to Digital Circuitry 30 The 7 5 vdc supply voltage is established by U9 a voltage convertor This device inverts the input voltage to a 7 5 vdc level It also acts as a voltage doubler to operate 14 5 V The 5 vdc voltage is provided by U8 a 7805 regulator As soon as the 8 volt power supply voltage is present Q2 turns on which turns on the DS2 and DS3 LEDS The analog to digital circuitry consists of two weight voltage amplifiers U1 and U2 a reference amplifier U3 an analog switch U4 switch control logic gate U18 a dual slope integrator U5 and a comparator U6 An 8 vdc excitation voltage is supplied to the weight sensors from P6 pins 1 and 6 The millivolt signal received back from the weight sensors enters the analog to digital circuitry at P6 pins 3 and 4 This millivolt signal is amplified and filtered by U1 and 02 to establish the amplified weight voltage 0 to 9 vdc at U2 pin 6 This weight voltage is then provided to U4 pin 5 A logic low during the weight voltage interval at U4 pin 1 enables the amplified weight voltage to be received by the dual slope integrator 05 Starting at zero volts the integrator C20 charges at ramp angle directly prop
16. G N to exit Use this setting to choose whether Layout 1 or Layout 2 will be printed When you press the key during displays When auto printing occurs after Acc Sec timer runs out or when motion ceases e When an enquire character is received default is HEX 05 The printout will contain the following information Line 1 Optional User defined 40 ASCII characters See ASCII Line 2 Optional ID number printout Line 3 Layout 1 or Layout 2 Layout 1 will show Layout 2 will show Date Time Date Time G weight Displayed weight G T or N T weight N weight Model 915 Indicator Service Manual ASCII Below are samples of printouts with Layout 1 and Layout 2 HOD MODEL 915 ID 1 ID 12345678 03 20 02 09 04 03 03 20 02 09 04 03 15148 1b B 15140 lb T lb 8 18228 lb Layout 1 with Layout 2 with optional optional ASCII line ASCII line and optional and optional ID ID number included number included Below are the steps to choosing Layout 1 or 2 1 2 Key in 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT ConF is displayed Press MENU repeatedly until SEriAl is displayed Press SELECT bAUd is displayed Press MENU repeatedly until LAYoUt is displayed Press SELECT 1 or 2 is displayed Press MENU until the layout you want is displayed then press SELECT That layout is now active Press MENU to scroll to next desire
17. for D Star or Eaton trans Configuration Code ducers consult the Configuration Code Charts in Tables 6 or 7 Charts Using the Eaton The Eaton Configuration Code Chart See Table 7 shows you how selec Configuration Code Chart tions listed below for five configurable parameters would be represented by Table 6 a configuration code of 4151 Notice that each digit in the code represents a parameter and the value of each digit represents a selection for that param eter as shown in Table 9 Table 7 Eaton A Sample Set of Configuration Choices and Its Corresponding Configuration Code 4151 Parameter Represented by Selection Config Code Sensitivity 2nd digit 034 1K Capacity x Increment Size 3rd digit 20K x 2 N A Ath digit N A Units of Measure 5th digit Ib CODE 4151 uses 2nd 3rd 4th and 5th of five available digits Model 915 Indicator Service Manual 35 Using the D Star The D Star configuration Code Chart See Table 8 shows you how selec Configuration Code Chart tions listed below for five configurable parameters would be represented by a Configuration Code of 3151 Notice that each digit in the code represents Table 7 a parameter and the value of each digit represents a selection for that parameter as shown in Table 10 Table 8 D Star A Sample Set of Configuration Choices and Its Corresponding Configuration Code 3151 Parameter Represented by Selection Config Code Axle Size 2nd digit 2 1 8 3 Cap
18. required return to this section and proceed to the next topic Sensitivity Of Transducer A Determine the sensitivity rating that is mV V output at full capacity for the weight transducer s you are using The transducer probably carries this information or access to it stamped or printed on the transducer itself Call the factory at 1 800 458 7062 for help in determining the Model 915 sensitivity rating for your transducer s Because many different types of bars are used by various manufactur ers it is impossible to generically document a way to determine Model 915 sensitivity ratings for all available weight transducers C Write down your calculated sensitivity rating _ _______ Using this format n nnnnnnn your sensitivity rating 1 2345678 digit places You may key in a mV V value of up to eight digits Selection range for sensitivity is from 0 075 to 6 0 mV V Capacity X Increment Size Of Transducer D Referto Table 4 and locate a Capacity x Increment Size combination that is appropriate for your Indicator E Note the column number in which appropriate Capacity x Increment Size combination is located Write down the column number Keep your notation handy for entry in step 3 of the following keying procedure F Now look to the right and find the row number that applies to your selected Capacity x Increment Size G Write down the appropriate row number for use in step 10 Model 915 Indicator Ser
19. 1 2 or 3 To decrease span press 7 8 or 9 To return span to factory calibrated value press 4 5 or 6 Calibration is complete Press SELECT SPAn is displayed Press MENU to advance or press G N to return to corresponding operational mode Model 915 Indicator Service Manual Getting Ready to Calibrate with BLH Model 625 Calibrator Number of Weigh Bars and Type of Connector Four Weigh Bars w 5 Pin Connectors Four Weigh Bars w 4 Pin Connectors One Weigh Bar w 7 pin Connector Calibrating with a BLH Model 625 Calibrator This method of calibration is intended for trained technicians using special ized equipment Use appropriate instruction shown in Table 5 to connect the BLH Model 625 Calibrator to the Model 915 Indicator Determine highest mV V reading according to factors of Weigh Bar size and full capacity of system using appropriate Calibration Table as referenced in Table 5 Write down highest mV V reading for use in Step 8 of following proce dure Table 5 Calibrator Connections And Calibration Tables Instructions for Connecting Indicator with BLH Calibrator Connect single cable from BLH Calibrator to one of the 5 pin Weigh Bar connectors Connect four cables from a modified BLH Calibrator to all four 4 pin Weigh Bar connectors Connect single cable from BLH Calibrator to the single 7 pin Weigh Bar Connector Dial BLH Calibrator to zero mV V Zero indicator
20. 122 16271 0032 R1 RESISTOR 510 14477 1383 50 MODEL 912 REMOTE DISPLAY MAIN PC BOARD SCHEMATIC 51 XM710 L HAND HELD TRANSMITTER P N 51760 0011 XM910 HAND HELD TRANSMITTER 4 CHANNEL P N 51579 0012 ZERO TARE G N R WEIGH TRONEX XM910 MODEL 915 INDICATOR 12VDC KEYPAD SCHEMATIC KEYPAD ASSY P N 47698 0057 52 WEIGH TRONIX XM710 L MODEL 912 REMOTE DISPLAY MAIN PC BOARD SCHEMATIC 7 ZERO TARE WEIGH TRONIX XM910 EAS A 15 30 X SCR x 55 53 Weigh is a registered trademark of Weigh Tronix Inc 04 22 03 915_S P65 PN 29719 0019B e3 Printed in USA Standard Scale amp Supply Company 25421 Giendale Avenue Redford MI 48239 313 255 6700 www standardscale com LN WEIGH TRONIX SCALES FOR AGRIBUSINESS
21. 7 1018 19 91511 c ala 1 2 3 6 7 12 4 5 8 9 WHT RED CTS WHT ORN DTR BLU PWR RETURN GRA 12 GRN LOGIC GND BRN TRANSMIT F PRINTER RED F WHT BRN CHASSIS GND WHT BLK WHT BLK ORN DATAC 2 F YEL 5V WHT LOGIC GND REMOTE ZERO DAA 1 F RD912 CLOCK F REMOTE PRINT 12V PWR RETURN CHASSIS GND pci 1 GND 2 REMOTE DISPLAY AND RS232 CABLE CONNECTOR P N 27639 0051 915411 MODEL 915 INDICATOR 12VDC W B PANEL ASSY amp CABLE CONNECTOR SCHEMATICS c 43 MODEL 915 INDICATOR 12VDC MAIN PC BOARD A D ASSEMBLY P N 47683 0039 0047 w Remote RS 232 5 2 O SYMBOL DESCRIPTION W T P N SYMBOL DESCRIPTION W T P N lt 1 BI BATTERY 3 6 V 23957 0021 R29 RESISTOR 910 OHM 14477 0724 ma 1 2 5 6 9 R31 34 RESISTOR 15K 14477 1011 11 12 14 15 2 R35 RESISTOR 200K 15677 5108 2 23 26 29 31 R36 RESISTOR 59 15677 4598 C y 32 34 45 46 CAP 0 1 UF 100 V 15623 0120 R37 RESISTOR 0 470 OHM 46602 0179 a E let 65 70 72 73 CAP 0 1 UF 50V 46684 0040 R3
22. 710 L Hand Held Remote 51760 0011 1 15 Pnl Assy Single W B Conn 7 Pin 52956 0054 1 Pnl Assy Single W B Conn 7 PIN w RD 85232 52956 0104 1 Pnl Assy Single W B Conn 7 PIN w RD amp RS232 52956 0120 1 Assy 4 W B Conn 4 Pin 52956 0021 1 Assy 4 W B Conn 5 Pin 52956 0013 1 Assy 4 W B Conn 4 PIN w RD or 85232 52956 0070 1 Assy 4 W B Conn 5 PIN RD or 85232 52956 0062 1 Pnl Assy 4 W B Conn 5 PIN RD amp 85232 52956 0112 1 16 FuseHolder 15455 0016 2 17 Fuse 5Amp 15453 0042 2 18 Screw 6 32 X 25 SS 14473 0223 7 19 Lock Washer 6 14474 0032 7 20 Standoff 6 32 X 50 M F 15437 0449 3 21 Standoff 46 32 X 56 M F 15437 5000 2 22 Remote Display RS 232 Wire Harness remote or RS 232 27639 0044 1 Remote Display RS 232 Wire Harness remote amp RS 232 27639 0051 1 41 DISPLAY PC BUARD ASSY P N 47686 0010 KEYPAD DISPLAY BD ASSY P N 47698 005 MODEL 915 INDICATOR 12VDC SYSTEM BLOCK DIAGRAM WITH REMOTE DISPLAY PIN OUTS
23. 8 39 74 RESISTOR 10 0 15677 3855 5 C3 4 CAP 22 UF 50V 23267 0117 R41 RESISTOR 3 9 K 14477 0872 ES C7 8 18 19 26 nese R42 50 RESISTOR 4 7 OHM 14477 0179 27 1 0 UF 35V 22327 2519 843 44 RESISTOR 22 OHM 14477 0336 3 e d Eus R45 RESISTOR 57 6K 15677 4580 E 148 015 R46 RESISTOR 13K 15677 3962 E JA CAP A7 6 1993 0094 R47 RESISTOR 464 OHM 15677 2576 C13 17 21 37 100 200 V 15619 0134 Hag RESISTOR 100K C16 a 25 2 x 849 RESISTOR 51 14477 0906 C20 CAP SIUE IU 8083 R51 RESISTOR 10 MEG 14477 1698 C24 CAP 4700PF 100 V 15620 0018 HESSE C25 36 74 76 CAP 0 01 UF 100 V 15620 0123 a RESISTOR 120 OHM 7 1698 C34 CAP 1000 UF 35 V 17995 0142 RESISTOR EK 144770906 C35 10UF 35V 22327 2618 R62 RESISTOR 330 14477 1334 C49 50 51 CAP 22PF 200 V 15619 0050 RESISTOR T 14477 0896 rare Ee CAP 15 PF 200 V 1561820035 R65 RESISTOR 200 OHM 14477 0575 CR1 4 DIODE 1N4142 15668 0076 R72 RESISTOR 5 23 K 15673 3586 ri CR2 6 7 DIODE 1N4004 15668 0043 R75 RESISTOR 1 0 15673 2803 CR3 DIODE 1 5817 15668 0324 RESISTOR NETWORK 5 62 301 23256 0011 CRS DIODE 1N4148 15668 0035 RN2 8 RESISTOR NETWORK 9 X 10 K 17852 0045 DS1 DISPLAY LCD 22329 0040 RN3 RESISTOR NETWORK 5 X 10K 17852 0086 052 3 LED 2000 27472 0010 RN4 6 RESISTOR NETWORK 4X 1 K 17852 0037 A SES FILTERS 26517000 RN9 10 RESISTOR NETWORK 10 17852 0029 2 41 CONNE
24. ASSY 47686 0028 BEZEL 21356 0014 46 SCREW 6 32 x 25 SS 14473 0223 7 LOCK WASHER 6 14474 0032 SCREW 10 32 x 75 18087 0073 12 KEYPAD ASSY 47698 0065 1 CABLE ASSY 30 48412 0019 1 CABLE ASSY 15 48412 0027 WASHER 27357 0010 4 RUBBER MOUNT 17807 0058 4 MOUNTING 11899 0043 1 XM710 L HAND HELD REMOTE 51760 0011 1 XM710 L RECEIVER ASSY 51763 0018 1 RD 912 REMOTE DISPLAY MAIN PC BOARD P N 47686 0028 PARTS AND ASSEMBLY SYMBOL DESCRIPTION W T P N SYMBOL DESCRIPTION W TP N C1 CAPACITOR 1000 100 V 46684 0022 82 RESISTOR 330 OHM 15670 0619 C2 3 CAPACITOR 0 1 UF 50V 46684 0048 R3 RESISTOR 1K 14477 0732 C4 CAPACITOR 47 10V 17992 0095 R4 5 6 13 5 6 CAPACITOR 0 1 UF 100 15623 0120 14 RESISTOR 10K 14477 0971 C7 CAPACITOR 100 UF 25V 17994 0101 R7 8 9 RESISTOR 22K 14477 1052 CRI DIODE 5817 15668 0324 R10 11 12 RESISTOR 120 OHM 14477 0581 051 DISPLAY LCD 26483 0027 U1 2 3 IC 5453N 15657 0624 DS2 3 LED H 2000 27472 0010 04 IC 74HC14 18080 0096 11 INDUCTOR 10 UH 15779 0015 05 IC 74HC04 18080 0047 P2 CONNECTOR 10 PIN 17794 0095 XDS1 SOCKET SIP 25 PIN 17847 1017 P3 CONNECTOR 3 PIN 17794 0020 XDS1 SOCKET SIP 20 PIN 17847 1041 P4 CONNECTOR 15 PIN 17731 0141 XDS1 BACKLIGHT DISP FIBER 27459 0033 Q1 TRANSISTOR TIP
25. CAPACITY x INCREMENT SIZE 0 1 2K x 1 2K x 2 2K x 5 20K x 1 20K x 2 20K x 5 1 1 Poly 20K x 1 20K x2 20K x5 200K x 10 200K x 20 200K x 50 2 1 7 8 20K x 1 20K x 2 20K x5 200K x 10 200K x 20 200K x 50 2 20K x 1 20K x 2 20K x5 200K x 10 200K x 20 200K x 50 3 2 1 8 20K x 1 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 2 1 2 20K x 1 20K x 2 20K x5 200K x 10 200K x 20 200K x 50 2 7 8 20K x 1 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 3 3 4 20K x 1 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 4 CT 20K x 1 20K x 2 20K x 5 200K x 10 200K x 20 200K x 50 19 Custom Sensitivity and Capacity x Increment See text Configuring Custom Sensitivity with Capacity x Increment Size Column M Numbers 1 2 3 4 5 WARNING ALARM FIELD CALIBRATION FACTOR To insure accuracy recalibrate the scale system with a known weight after reconfiguring for J Star See Cali brating Using Known Weight 10 N A 0 9 are all acceptable as this is an unused parameter 0 1 2 3 4 5 6 7 8 9 3 kg j 3151isthe Configuration Code number representing selections cited in USING Table 1 CONFIGURATION CODE EXAMPLE RW 12345 are place numbers for each digit in Configuration Code Symbols Used in Table 9 K Multiply by 1000 Model 915 Indicator Service Manual 39 40 Model 915 Indicator Service Manual 9 g
26. CTOR 10 SOCKET 46635 0055 ENT VARISTOR VED7AT2 16046 0028 Ki SEDE HE 01 7652 14323 0464 gt 11 2 10 15779 0015 2 3 5 8 308 14323 0266 a DE 5 3 P3 CONN 2 17794 0012 0 311 14323 0258 h 281 88 Pa 171340148 09 REGULATOR 7660 15658 0227 H Po CONN LAPIN 010 6 1 15657 0665 ae A s nis gt Eo SON SS DIN 177940015 11 REG 7805 15658 0011 Sed BEST P9 CONN 26 PIN MALE 17818 0295 18080 0260 JEN Lo ts TRANSISTOR 8122 162710082 1567 0632 TR 014 IC 74HC573 18080 0559 03 5 TRANSISTOR 243904 15665 0012 UTE REDE IONE 5 7 12 17 19 4 Eon 309 XU 016 PROG 915 51520 0012 01719 74HC14 18080 0096 R8 RESISTOR 9 09 K 17873 1899 E U18 74HC00 18080 0013 E R9 RESISTOR 64 9 K 17873 2715 U20 21 74HC32 18080 0138 R10 RESISTOR 196 K 17873 3176 U22 74HC10 18080 0070 R11 RESISTOR 8 06 K 15677 3764 IG 4080 0245 R13 14 RESISTOR 37 4 17873 2483 U25 27 IC 74HC590 18080 0617 R15 16 RESISTOR 42 2 17873 2533 028 74HC541 18080 0575 R18 RESISTOR 110K 15673 4857 U29 IC MAX232CPE 14323 0621 R20 21 RESISTOR 182 OHM 15677 2188 REGOLATORI OT 5659 THES R22 RESISTOR 470 K 14477 1375 VR2 DIODE ZENER 1N5353B 16V 15669 0158 R23 63 RESISTOR 22 MEG 14477 1771 XU7 HEA
27. E key and hold for two seconds Press SELECT Press MENU repeatedly until is displayed Press SELECT Press MENU repeatedly until desired setting is displayed Press SELECT Press MENU key to advance or press G N key to return to corresponding operational mode Model 915 Indicator Service Manual 915 is displayed 915 E is displayed ConF is displayed UPdAIE is displayed and update rate is set Configuring Input 1 and Input 2 A Recall RM key A M key A Plus M key Inputs 1 and 2 allow you to perform certain functions remotely Input 1 is used with the XM710 L remote Input 2 is used with a switch you connect to the Model 915 When you choose a parameter under either Input 1 or Input 2 that becomes the function performed when the remote key or switch is activated 1 2 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT Conf is displayed Press MENU repeatedly until inPUt 1 or inPUt 2 is displayed Press SELECT ZErO is displayed Press MENU to scroll through the list shown below ZERO gt TARE gt G N gt A J A PLUS PRINT Press MENU until desired function is displayed then press SELECT Function is now set Press MENU key to advance or press G N to return to corresponding operational mode Model 915 Indicator Service Man
28. T SINK 15556 0014 R24 25 RESISTOR 3 3 14477 0856 1 CRYSTAL S00 NRZ TT R26 27 RESISTOR 2 0 K 14477 1110 Y2 CRYSTAL 32 768 MHZ 16125 0188 R28 RESISTOR 750 OHM 15670 0700 915 44 MODEL 915 INDICATOR 12VDC MAIN PC BOARD A D ASSEMBLY SCHEMATIC 45 46 MODEL 915 INDICATOR 12VDC MAIN PC BOARD A D SCHEMATIC continued MODEL 915 INDICATOR 12VDC MAIN PC BOARD A D SCHEMATIC continued 47 MODEL 915 INDICATOR 12VDC DISPLAY BOARD P N 47686 0010 PARTS AND ASSEMBLY SYMBOL DESCRIPTION W T P N C1 CAPACITOR 1000 PF 100 V 46684 0022 C23 46684 0048 C5 6 15623 0120 C7 CAPACITOR 100 UF 25V 17994 0101 CRI DIODE IN5817 15668 0324 DS1 DISPLAY LCD 26483 0027 DS2 3 LED 2000 27472 0010 L1 INDUCTOR 10 UH 15779 0015 P1 CONNECTOR DUAL ROW 23956 0022 10 PIN Q1 TRANSISTOR TIP122 16271 0032 RI RESISTOR 510 14477 1383 R2 RESISTOR 330 OHM 15670 0619 R3 RESISTOR 1K 14477 0732 U1 2 3 IC 5453N 15657 0624 US IC 74HC04 18080 0047 XDS1 SOCKET SIP 25 PIN 17847 1017 XDS1 SOCKET SIP 20 PIN 17847 1041 XDS1 27459 0033 BACKLIGHT DISP FIBER 48 MODEL 915 INDICATOR 12VDC DISPLAY SCHEMATIC 49 RD 912 REMOTE DISPLAY PARTS AND ASSEMBLY ITEM NO DESCRIPTION W TP N QTY JO OQ 10 11 12 13 ENCLOSURE 47017 0010 1o MAIN DISPLAY BOARD
29. acity x Increment Size digit 20K x 2 N A 4th digit 5 Units of Measure 5th digit 1 CODE 3151 uses 2nd 3rd 4th and 5th of five available digits 36 Model 915 Indicator Service Manual STANDARD PROCEDURE OPTIONAL MENUS PROCEDURE Key in 915 and press Key in 915 and press hidden E key for two hidden E key for two seconds seconds Currently configured model number is displayed 915 is displayed For Weigh Tronix 915E 916E 917 For Eaton EAtn 2 Continue keying as appropriate for intended purpose and For D Star dStr mode Do you want displayed menu or do you need a different menu Displayed menu is correct Different menu is required 2 Continue keying as 2 Press and hold hidden E appropriate for intended key until next menu is purpose and mode displayed repeat until proper menu is displayed 915E 916E 917E for W T Weigh Bars NOTE To bounce between Weigh Tronix menus Eaton for Eaton enter 915 916 917 transducers and press and hold the hidden E key until 915E dStr for D Star transducers _916 or 917E is displayed This allows easy conversion between different Weigh Tronix 3 Press hidden E key firmly for applications by only FPSS remembering 915 916 Ea O Figur
30. al Model 915 Master Reset To completely reset the Model 915 s memory including calibration default factory calibration code 18080 configuration memory channels and tares perform the following 1 Turn the unit off 2 Depress the ZERO CLEAR and GIN keys and press the ON key Unit displays HELLO Warning 3 After five seconds release the ZERO CLEAR and G N keys Unit displays gross weight Only perform this procedure if absolutely necessary Remem 4 Follow instructions and ber all calibration configura recalibrate and adjust all tion memory channels and configuration parameters as they tares will be cleared will all be default values To insure calibration accuracy the unit must be calibrated under factory calibration Code 18080 at 2 0 mV V 20 000 Ib Model 915 Indicator Service Manual 33 Programming Appendix Configuration for D Star Eaton and Two Additional Weigh Tronix Menus 34 The D Star Eaton interface protocol slightly modifies display and keying sequences for accessing Configuration Mode Calibration Mode and Internal Raw Counts Mode The Model 915 has two more 916E 917E menus available to make converting between different Weigh Tronix appli cations even more flexible New displays and keying sequences require modified instructions Modified documentation presented in the Programming Appendix applies whenever you change the transducer interface on your system and the chan
31. and hold for two seconds Press SELECT Press MENU repeatedly until OVER CAP is displayed Press SELECT Key in desired capacity Press SELECT Press G N key to return to corresponding operational mode Model 915 Indicator Service Manual 915 is displayed 915 E is displayed Conf is displayed Current capacity is displayed New capacity is set and OVER CAP is redisplayed 13 Calibration Mode Instructions for Calibration Mode include Calibrating Using a Known Weight Getting Ready to Calibrate with BLH Model 625 Calibrator Calibrating with Model 625 Calibrator Use a reliable known weight equal to or greater than the maximum weight of Calibrating Using a Weight 2 YOU MAY EXIT this procedure 5 from any menu display by pressing the GIN key 10 material that will be weighed Empty and zero the scale Key in 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT Conf is displayed Press MENU repeatedly until SPAn is displayed Press SELECT Zero value should be displayed before you continue re zeroing is necessary press ZERO CLEAR Place known weight on the scale Display represents gross weigh ment of known weight prior to calibration Adjust span using numeric keys as shown until weight display equals value of known weight Span 15 adjustable 10 To increase span press
32. ayed 3 Press SELECT ConF is displayed 4 Press MENU repeatedly until is displayed 5 Press SELECT 6 Press MENU repeatedly until desired division is displayed 7 Press SELECT Motion stability is now enabled 8 Press MENU key to advance or press G N key to return to corresponding operational mode Model 915 Indicator Service Manual 19 Setting Filter Selection YOU MAY EXIT this procedure from any main menu display by pressing the GIN key Setting Update Selection 20 This option allows you to choose the level of weight averaging that the indicator will display You may choose between a normal intermediate which is the default or high level of filtering 1 2 915 Press hidden key hold for two seconds Press SELECT Press MENU repeatedly until FiltEr is displayed Press SELECT Press MENU repeatedly and scroll to desired setting Press SELECT Press MENU key to advance or press G N key to return to corresponding operational mode 915 is displayed 915 E is displayed ConF is displayed Nor is displayed for normal filtering IntEr is displayed for intermediate filtering and High is displayed for high filtering FiltEr is displayed and filtering level is set This option allows you to choose the rate at which your display updates information 1 2 or 5 times per second Two is the default value 1 2 Key in 915 Press hidden
33. d option or G N to exit The ASCII parameter lets you customize the first line of any printout You key in the ASCII code number for the character you want to print You use up to 40 characters in the line The codes are shown in Table 6 1 2 Key in 915 91515 displayed Press hidden E key and hold for two seconds 915 15 displayed Press SELECT ConF is displayed Press MENU repeatedly until SEriAl is displayed Model 915 Indicator Service Manual 25 5 Press SELECT bAUd iis displayed 6 Press MENU repeatedly until ASCII is displayed 7 Press SELECT 1 _ is displayed The 7 refers to the first of the 40 characters you can insert 8 Keyin the control code from Table 6 and press MENU 2 _ is displayed Following is an example of how to enter Model 915 lt CR gt lt LF gt Enter the following control codes Sequence Control Code Control Character 01 77 02 79 O 03 68 D 04 69 E 05 76 L 06 32 SPACE 07 57 9 08 49 1 09 53 5 10 13 Carriage Return 11 10 Line Feed edit an existing sequence 9 Repeatstep8 until all control 5 22 codes entered and press j SELECT ASCII is displayed new ASCII code number and PR press SELECT to return to the 10 Press G N ke to exit ASCII display Press the GIN programming mode and return key when you are done to the gross net weighing mode To Delete All ASCII 1 Access Serial ASCII in the Characters configuratio
34. e 2 Standard and Optional Procedures for Accessing Optional Setup Modes Model 915 Indicator Service Manual 37 Table 9 Eaton Configuration Code Chart TRANSDUCER DESCRIPTION SENSITIVITY 2 2 034 100 2 2 017 100 2 2 068 1 20K 2 034 1 20K 2 017 1 5 pin 200K x 10 200K x 20 100 1 5 pin 20K x 1 20K x 2 CAPACITY x INCREMENT SIZE 2K x 5 20K x 1 20K x 2 20K x 5 2K x 5 20K x 1 20K x 2 20K x 5 2K x 5 20K x 1 20K x 2 20K x 5 20K x 5 200K x 10 200K x 20 200K x 50 20K x 5 200K x 10 200K x 20 200K x 50 200K x 50 200K x 100 200K x 200 200K x 500 20K x 5 200K x 10 200K x 20 200K x 50 9 Custom Sensitivity and Capacity x Increment See text Configuring Custom Sensitivity with Capacity x Increment Size QA 4 2 Column Numbers WARNING ALARM FACTOR unused parameter 0 1 2 3 4 5 6 7 8 9 GS 4 FIELD RECALIBRATION To insure accuracy recalibrate the scale system with a known weight after reconfiguring for Eaton See Calibrating Using a Known Weight 10 0 9 are all acceptable as this is an 1 5 115 the Configuration Code number representing selections cited in USING EATON Table 6 t 12345 are place numbers for each digit in Configuration Code Symbols Used in Table 8 K Multiply by 1000 38 Model 915 Indicator Service Manual Table 10 D Star Configuration Code Chart TRANSDUCER DESCRIPTION AXLE SIZE
35. fy correct A D output In conjunction with a coarse zero potentiometer on a junction box to adjust absolute zero Key in 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT ConF is displayed Press MENU repeatedly until Intr is displayed Press SELECT Internal Raw Count value is dis played At 1 0 mV V the display will always read 10 955 counts 6 You May Adjust Absolute Zero if your scale system includes a junction box with a coarse zero potentiometer When Internal Raw Counts are displayed remove all weight from the scale and adjust the coarse zero potentiometer until the display reads 0 6 T Press SELECT Intr is displayed Press MENU to advance or press G N to return to corresponding operational mode Model 915 Indicator Service Manual 17 Auto Zero Tracking Selection Disabling Azt 2 YOU MAY EXIT this procedure from any main menu display by 5 pressing the G N key Model 915 comes standard with Auto Zero Tracking AZT of 1 division This section explains how to disable this feature if necessary 1 915 915 is displayed Press hidden E key and hold for two seconds 915 E is displayed Press SELECT Conf is displayed Press MENU repeatedly until AZt is displayed Press SELECT Press MENU repeatedly until 0 0 is displayed Press SELECT AZT is now disabled AZT division sizes are 0 5 1 0 2 0 3
36. ge means a different transducer trade name than that previously configured for This includes switching from D Star or Eaton transducers back to Weigh Tronix Weigh Bars In applications where Weigh Tronix Weigh Bars are retained original documentation applies When switching the transducer interface on a system means a change in transducer trade names follow the modified procedure shown below and illustrated in Figure 2 to access Configuration Mode Calibration Mode and Internal Raw Counts Mode Always execute the steps below before keying in a new Configuration Code or trying to calibrate a transducer with a different trade name 1 Key 915 and press E key for two seconds Currently configured menu 1 displayed For Weigh Tronix 915 916E 917E for Eaton EAtn for D Star DStr 2 You now have two choices A or B A If displayed menu is correct skip to step 4 OR B If displayed menu does not correspond with new transducer interface press and hold E key until next option appears Model 915 Indicator Service Manual 3 Ifeach of the Weigh Tronix menus have been configured for different applications it is possible to bounce between the 915E 916E and 917E menus Press 915 916 or 917 and hold the E key until the optional menu is displayed pes Eatn Dstr 916E 917 E 4 Continue keying as appropriate to access desired modes To determine an appropriate Configuration Code
37. layed 2 Press hidden E key and hold for two seconds 915 E is displayed 3 Press SELECT ConF is displayed 4 Press MENU repeatedly until SEriAl is displayed 5 Press SELECT bAUD is displayed 6 Press MENU until Auto is displayed 7 Press SELECT 8 Press MENU to display either OFF or on 9 Press SELECT Depending on your choice auto print is now either off or on 10 Press MENU to scroll to next desired option or G N to exit Model 915 Indicator Service Manual 23 Enquire Layout 24 This submenu allows you to choose a printer or other device which will send an enquire code to the indicator You may select the ASCII code number you wish to recognize as the enquire code number ASCII decimal 0005 is the default value If a device sends the enquire code number to the indica tor the indicator will recognize the value then transmit weight data If a computer sends the enquire code number the Auto selection is overridden and will not function 1 Keyin915 915 is displayed 2 Press hidden E key and hold for two seconds 915 E is displayed 3 Press SELECT Conf is displayed 4 Press MENU repeatedly until is displayed 5 Press SELECT bAUd is displayed 6 Press MENU repeatedly until is displayed 7 Press SELECT Current enquire code number 15 displayed 8 View or change enquire code 9 Press SELECT Enquire code is now set 10 Press MENU to scroll to next desired option or
38. n RS 232 communications interface or a remote display interface requires R32 61 64 65 C61 64 U17 U19 U29 and P5 connector The RS 232 transmitter receiver U29 internally generates 10v and 10v supplies and meets all EIA RS 232C specifications Through U10 the microprocessor communicates with peripherals which will accept the follow ing protocol baud rate 1200 1 start bit 8 data bits no parity and one stop bit The RS 232 communications port supports X on HEX 11 X off HEX 13 handshake and responds to an inquire character HEX 05 print request You may also enable or disable the hardware handshaking ready busy line CTS P5 13 The invertor buffer gates U16 are used in the remote clock remote data remote zero and remote print lines to provide isolation and assure proper logic levels to and from the remote display P6 connector provides external access to power supply voltages RS 232 data lines remote display drive lines remote zero lines and remote print lines TO INSTALL REMOTE RECEIVER After installing the receiver assembly P N 51762 0019 as shown in assembly section plug 3 pin cable assembly into P8 This enables user to have remote capabilities Print Zero M M RM Tare within the Model 915 Be sure to match dip switch selections between receiver card and transmitter Place antenna through small hole in the lower stainless steel assembly in order to function properly Model 915 Indicator Service Manu
39. n menu ASCII is displayed 2 Press the ZERO CLEAR key ASCII blinks and all the control codes are cleared 26 Model 915 Indicator Service Manual Table 6 ASCII Control Codes Control Control Code Character Code Character 5 25 55 Control Character e a e fe fees 4 27 Model 915 Indicator Service Manual Printing Out the Configuration Parameters 28 The 915 has the ability to print out the entire list of configured parameters To obtain this printout follow these steps 1 From gross mode key in 915 91515 displayed 2 Press and hold the hidden E key 915 15 displayed 3 Press the PRINT key Print is shown on the display and the following is printed Default Printout Shown 05 07 98 13 04 28 MODEL 915 VERSION 51520 0012 Rev X1 CONFIG 18080 OUTPUT 2 0000000 CAP 1 OVER CAP 20000 SPAN 0 Ib COUNTS 0 1 0 STABILITY 1 0 FILTER Normal DISPLAY RATE 2 INPUT 1 ZERO INPUT 2 PRINT BAUD 1200 READY BUSY Disabled AUTO PRINT Off ENQUIRE 5 LAYOUT 1 AXLE TIMEOUT 0 Sec BATTERY VOLTS 12 0 Model 915 Indicator Service Manual Circuit Descriptions
40. ortional to the amplified weight voltage but of opposite polarity As the amplified weight voltage increases the integrator output ramps more in the negative direction The voltage received from the sense lines enters the analog to digital circuitry at P6 pins 2 and 5 This sense voltage establishes a reference voltage of 9 vdc at U3 pin 6 The reference voltage is applied to U4 pin 10 After the integrator capacitor has been charged for a fixed period of time the Weight Voltage Interval U4 pin 1 goes high U18 applies a logic low to pin 14 of U4 which allows the reference voltage to be applied to the integra tor Since the reference voltage 9 vdc is of opposite polarity to the ampli fied weight voltage it causes the integrator output to ramp back toward zero This period of time is known as the Reference Voltage Interval While the integrator output is ramping back to zero the comparator U6 signals the microprocessor to record this period of time in clock pulses The microprocessor uses this number of pulses to calculate the amount of weight on the scale When the integrator reaches zero the comparator output goes low which triggers U18 to remove the logic low at U4 pin 14 completing one analog to digital cycle This analog to digital conversion repeats at a frequency of 30 hertz Model 915 Indicator Service Manual Microprocessor Circuitry The Microprocessor Circuitry consists of a Motorola MC68HC11A1 8 bit microproces
41. r and Two Additional Weigh Tronix Menus 34 Table 7 Eaton A Sample Set of Configuration 35 Table 8 D Star A Sample Set of Configuration Choices 36 Table 9 Eaton Configuration Code 37 Table 10 D Star Configuration Code Chart conc na ncnnnnnnnnos 39 Technical ll stratiors Pe PR e es 41 53 Model 915 Indicator Service Manual Model 915 Weight Indicator provides a setup mode for the following functions Configuration Over capacity Calibration Internal Raw Counts Used for J Box coarse zero adjustment Automatic zero tracking AZT Motion stability Filter selection Display update rate Alarm warning Serial communication protocol hidden key is used to access the setup mode The E key is touch The Hidden E Key sensitive like all other indicator keys but unlike other keys the E key has no key face Access to the setup modes is intended only for trained technicians who use this Service Manual rather than for end users Figure 1 shows the location of the hidden E key MEMORY MOTION SERIAL NO WEIGH TRONIX FAIRMONT MINNESOTA U S A MODEL 915 N Figure 1 Hidden E Key on Model 915 Indicator Model 915 Indicator Service Manual
42. romagnetic interference If an error is detected the microprocessor is reset and operation continues When the indicator is powered up the momentary displayed hi message indicates the watch dog system is active If a hi message is displayed the indicator will perform correctly but will not be guarded by the COP watch dog system This may happen when a new microprocessor IC is installed The COP watch dog system can be activated by following this procedure Turn the indicator OFF jumper 7 1 to P7 2 and P8 1 to P8 2 Turn the Model 915 ON for few seconds e the Model 915 OFF Remove the jumpers Model 915 Indicator Service Manual 31 Display Card Circuitry RS 232 Serial Circuitry 32 The eight digit liquid crystal display card features black segments against silver transflective background Liquid crystal display driver U1 U3 require a 5 vdc power supply and three signal inputs two 33 bit serial data lines and a clock signal which provide the interface to driving the display segments These signals are provided to display board on connector J1 This display card also serves as the remote display card for the RD1012 Pell 8 x9 LI E O 589910 PI e OPTIONAL RS 232 OR REMOTE CIRCUITRY Additional circuitry required to provide either a
43. sor IC 013 a 74HC573 tristate latch 014 a 57C256 EPROM U16 and 32k x 8 RAM U15 The microprocessor features on chip memory 256 bytes of RAM 512 bytes of EEPROM along with a Computer Operating Properly COP watch dog system A 2 MHZ internal clock is contained in the microprocessor and is controlled by an external crystal Y1 Output ECLK from this clock provides timing reference for 016 RAM U15 and input to voltage monitor ing circuit U10 The microprocessor communicates with Analog to Digital switch control logic gate U18 through ports PA2 and PA6 Through U18 the timing refer ence for the Reference Voltage Interval and Weight Voltage Interval are provided The switches on the front panel receive a signal from ports PD3 PD5 on the microprocessor and they are monitored for an electrical change by ports PEO PE2 on the microprocessor U12 3 8 decoder provides the 8 key scans to interface to the keypad As signals are received by the microprocessor it will send them to the EPROM RAM 015 016 on the address lines 0 15 The signals will be translated and held by U14 Once all translating is completed the micropro cessor will enable U14 to return the new information on data lines 00 07 to the microprocessor Then the appropriate device will receive a signal from the microprocessor The Computer Operating Properly COP watch dog system in the micropro cessor detects errors introduced by elect
44. ual 21 Setting Serial The serial option allows you to set the following functions Functions Baud rate F _ 995 Busy Auto Enquire Layout ASCII Baud Rate This option lets you choose the baud rate for your printer or device 1 915 915 is displayed 2 Press hidden E key and hold for two seconds 915 E is displayed 3 Press SELECT ConF is displayed 4 Press MENU repeatedly until is displayed 5 Press SELECT bAUd is displayed 6 Press SELECT 7 Press MENU repeatedly until desired baud rate is displayed 8 Press SELECT Baud rate is now set 9 Press MENU to scroll to next desired option or G N to exit Busy Display This option enables or disables busy display 1 Keyin 915 91515 displayed 2 Press hidden E key and hold for two seconds 915 E is displayed 3 Press SELECT ConF is displayed 4 Press MENU repeatedly until SEriAl is displayed 5 Press SELECT bAUd is displayed 6 Press MENU repeatedly until bUSY is displayed 22 Model 915 Indicator Service Manual 7 Press 8 Press MENU to display either diSAbIEd or 9 Press SELECT Depending on your choice busy display is now either enabled or disabled 10 Press MENU to scroll to next desired option or G N to exit Auto Print With auto print enabled the indicator automatically transmits standard printout when motion ceases 1 Keyin 915 915 is disp
45. vice Manual 11 Column Numbers 0 200K x 10 0 20K x 1 0 2K x 1 200 x 01 200K x 20 0 20K x 2 0 2 2 200 x 02 Setting Custom Sensitivity amp Capacity Row Numbers Custom configuration starting with 19xxx must be previously entered to access CuSt menu Table 4 Row Numbers for Custom Capacity x Increment Size 200K x 100 0 200K x 10 0 20K x 1 0 2K x 1 200K x 50 0 20K x 5 0 2K x 5 200 x 05 Key in 915 Press hidden E key and hold for two seconds Press SELECT Press MENU repeatedly until CuSt is displayed Press SELECT Press SELECT Key in desired sensitivity if other than the one displayed and press SELECT Press MENU Press SELECT Key in desired capacity row number if other than the one displayed and press SELECT Press MENU to return to main configuration menu Press G N key to return to corresponding operational mode Model 915 Indicator Service Manual 200K x 200 0 200K x 20 0 20K x 2 0 2K x 2 200K x 500 0 200K x 50 0 20K x 5 0 2K x 5 915 is displayed 915 15 displayed ConF is displayed OutPut is displayed Current sensitivity will be displayed OutPutis displayed CAP is displayed Current capacity row number is displayed CAP is displayed Setting Custom Capacity Level The OVER CAP setting you enter will determine when the indicator displays a row of dashes for overcapacity Key in 915 Press hidden E key
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