Multi-Function Watchdog Card User Manual
Contents
1. ISOLATED 5V LKN V 45v Se RPS 4K7 LKH 5v y e RP2 T aen D2 pyinaras AN HES EXTT H 5v Ts c20 R33 EXT ZTX300 i EXT VE R35 NORMI A 100n 270K P1 8 CT res ak Ik R37 14 15 I t Cc RC 1 8 6 EXT I P 1 dl Y K Pi Ka 2 ons RP3 I 4K7 RP2 P1 4 CT 2 7 rou 7 HCT123 1 AN TLP620 2 y A 0 FANOK R38 R19 TR3 2 INVERT2 TR2JJ 7 egg P2 2 12 330R Jey 5 Z1X300 AKT 27x300 3 EXT I P 24 R36 NORMZ j s 5v P2 3 co P1 6 CI LA 4 53 Ier Tac 1K LKM ev SP D3 py1N4148 EXT I P 1 N pi RV4 P1 5 D 5 NF C23 y EE 3 DI LP 2 ISOLATED OV I J 470K P1 7 CT nd 220 500K EXT s Vs e WDOG DELAY C RC 10 B Q 5 5v EXT VE HCT123 2 RP2 I 4K7 EE RESET p D4 WATCHDOCOUT P1 9 A q t D ar BATES S 1 EP P1 16 P1 15 P1 14 P1 13 P1 12 AMET P1 10 RI TSOK 5 5v GND KA R2 R3 R4 ICL R12 RI TP5 EAR ar 7665 12V ci 9K1 330K GND PIN4 1M8 11k 12V 100 B9 Z Los es al SNS Tos Ka 12V OUT2 OUT RI RE RISI R14 IRISJ R16 700n 5V ISOLATED 5V 4 REN H 7 Toon 5V 2 TIK 9101 lot 83 297 nj RA sik L Jim Lesk Lama ig H cal cal Ca 022 024 c26 028 cl 14 7595a05 100n y Toon Tzu oon roo Too 100 1004 Trov 100 DEN De Ee ci ES dos ch n 2 n n n ji n u T n 1K 81 831 LT S p 2 u K 7 7 E d FVE 1000 Ti mc ISOLATED OV PC BUS 5v 12v2. Gjiko e Z1X300 RST 1011 105 1 AR wer E 2 LS38 3 tik D WATCHDOG MR _ MODE INT2 1 sh PH 10 Y 1 A Ta 9 i ib PATCH 1011 sia N13 LKA Bess 45v a GND Rea CR t 5 L zs INTA ES P 101 8 8 004H Ls38 4 165 ke 7824 A29 LT 2 3 2 fc 7 p SENDE A3 i Lo d 19 17825 P Q 8 008H e e 1z ler PATCH2 2 en nae D I e _ 9 0 822 t O 010H Wad Pali Sal 5 6 GND ie 1 A26 FI AS P Q t S 0201 nd ee PR 1 Ker Ze COMPONENT NOT FITTED LS688 PC BUS aos S q j GJ 6 7 86 a7 ee Ge ee GER BLUE CHIP TECHNOLOGY LIMITED P Q t 080H i ER EN E ISSUE OF PARIS LIST REN EP ANG MAIN AVENUE HAWARDEN INDUSTRIAL PARK DEESIDE CHS 3PP TEL 0244 520222 TELEX 61471 A8 P Q t 9 8 100H E S Se ALE A TITLE a i e 01 2001 EE i WATCHDOG WD 1 REV C mo np e dee CHK D CIRCUIT DIAGRAM REN PALSEL pb vv an Qe Pope DWN APPD DATE DWN APPD DATE DWN APPD DATE DRAWN MMc ES ss 2 A a MBER ER CM MMc 18 01 91 MMc GW 89 04 19 DATE 89 04 19 DRAWING NUMBE WDOTC 10 7 8 9 1 2 3 4 5 6
3. 01271013 doc User Adjustments Page 7 Figure 1 Selecting the Base Address Note View board with back panel on RHS Top 6 Bits of port address on links s gjololelaloje o MP 10 20 40 80 100 200 More example addresses are shown in Appendix A Note No two cards must occupy the same address 2 2 Port Map Three ports are used on the WD 1 to control all functions of the card These are described below Address Read Write Status Byte Mask Byte ADC Value Start Conversion Watchdog Reset bit Blue Chip Technology Ltd 01271013 doc Page 7 Page 8 User Adjustments 1 Mask Byte D7 D6 D5 D4 D3 D2 DI DO ADDRESS XXOH W O POWER MASK BIT VVATCHDOG MASK BIT TEMPERATURE MASK BIT EXTERNAL INPUT 1 MASK BIT EXTERNAL INPUT 2 MASK BIT FAN MASK BIT PATCH INPUT 1 MASK BIT PATCH INPUT 2 MASK BIT N B For each of the above Mask Bits 1 Enable function 0 Disable function 2 Star Convert D7 D6 D5 D4 D3 D2 Di DO ADDRESS XX1H W O ANY VALUE 3 Watchdog Reset D7 D6 D5 D4 D3 D2 Di DO ADDRESS XX2H W O ANY VALUE Page 8 Blue Chip Technology Ltd 01271013 doc User Adjustments Page 9 A Status Byte D7 D6 D5 D4 D3 D2 Di DO ADDRESS XXOH R O POVVER STATUS BIT PROCESSOR STATUS BIT TEMPERATURE STATUS BIT EXTERNAL INPUT 1 STAT
4. 027 1016 Toon TPE 45 LS14 2 v 5V CS POWEROK BS LT p EE 7 5v 4K7 12V 87 LT 1 12V COMPONENT NOT FITTED i Fv ee BLUE CHIP TECHNOLOGY LIMITED DRAWING UPDATED TO CURRENT PCB RAISED TO REV C ISSUE OF PARTS LIST CHANGES FROM REV B MAIN AVENUE HAWARDEN INDUSTRIAL PARK DEESIDE CH5 3PP TEL 0244 520222 TELEX 61471 R10 IN PARALLEL WITH R11 AND R5 WITH R6 REPLACED BY RV5 amp RV4 SCALE A3 TITLE RESPECTIVELY A3 0 66 BLUE CHIP WATCHDOG CARD 1P6 ADDED CHK D CIRCUIT DIAGRAM own APPD DATE dwn APPD DATE own APPD DATE DRAWN Vue WD 1 REV C GM 18 01 91 MMe 89 04 19 DATE 89 04 19 DRAWING NUMBER WDO1CO0C2 ISS 2 1 2 3 4 5 6 7 8 9 10
5. 12V Minimum pulse frequency 240ppm Output Connections Single pole changeover relay polarity sensitive Relay link selectable Max Voltage range SOV D C 30V A C Max contact current 750mA resistive Cut out Temperature 37 C factory set Cut out Voltages 4 75V 5V 11 65V 12V Voltage Cut out Hysteresis 0 1V 5V 0 15 12V Max Power Dissipation 1 75W Blue Chip Technology Ltd 01271013 doc Specifications Page 3 1 2 Physical Specification Blue Chip Technology Ltd 01271013 doc Page 3 Page 4 Specifications Electromagnetic Compatibility EMC This product meets the requirements of the European EMC Directive 89 336 EEC and is eligible to bear the CE mark It has been assessed operating in a Blue Chip Technology Icon industrial PC However because the board can be installed in a variety of computers certain conditions have to be applied to ensure that the compatibility is maintained It meets the requirements for an industrial environment Class A product subject to those conditions The board must be installed in a computer system which provides screening suitable for the industrial environment Any recommendations made by the computer system manufacturer supplier must be complied with regarding earthing and the installation of boards The board must be installed with the backplate securely screwed to the chassis of the computer to ensure good metal to metal i e eart
6. 2 External Inputs The following configurations are suggested applications for the opto isolated inputs EXT1 and EXT2 The first set up fig 6 3 shows a volt free contact utilising the on board isolated 5V OV The second fig 6 5 has Voltage level input using an external power supply to drive the opto inputs N B The maximum current that can be drawn from pins 4 6 is 10mA per pin Whilst every effort has been taken to ensure that the information provided is accurate Blue Chip Technology cannot assume responsibility for any errors in this manual or their consequences Should any errors be detected the company would greatly appreciate being informed of them A policy of continuous product development is operated resulting in the contents of this document being subject to change without notice Page 26 Blue Chip Technology Ltd 01271013 doc Appendix A APPENDIX A Note Vievy board vvith back panel on RHS Address Settings for Port 300H se kleed o 10 20 40 80 100 200 Address Settings for Port 200H e BOCH 10 20 40 80 100 200 Address Settings for Port 204H s o HGH 10 20 40 80 100 200 Address Settings for Port 210H sold folate o 10 20 40 80 100 200 Blue Chip Technology Ltd 01271013 doc MSB MSB MSB MSB Page 27 Page 27 Page 28 Appendix A Address Settings for Port 220H s KEEN gt 10 20 40 80 100 200 Address Settings for Port 230H slo stolt
7. CLOSED RELAY INPUT NON INV Fig 6 4 Link settings on WD 1 card for Fig 6 3 setup R oN 0 Noa Cl Dal NNN Cal Call WEN CN CNN CN Cal GND GND NORMAL 1 5V FAIL 0 OV NORMAL 0 0V FAIL 1 5V Fig 6 5 Remote level inputs with INPUTI non inverting and INPUT inverting LINK FUNCTION POSITION INTERNAL 5V OPTO SOURCE INTERNAL 0V OPTO SOURCE NON INVERTING LEVEL INPUT NON INV INVERTING LEVEL INPUT Fig 6 6 Link settings on WD 1 card for Fig 6 5 setup 7 8 9 10 1 2 3 4 5 6 5v D7 eL sei POWERCHK A LS 2 R25 H Vee 800 06 o p 228 WATCHDUGOK o Am 88 Fz AALT 8 12 HEV SON Ko BDI Ese
8. Microprocessor NMI Parity or I O Channel Check CTLR I CTLR 2 Interrupt Controllers IRQ 0 Timer Output 0 IRQ 1 Keyboard Output Buffer Full IRQ 2 Interrupt from CTLR 2 IRQ 8 Real time Clock Interrupt IRQ9 Software Redirected to INT OAH IRQ 2 IRQ 10 Reserved IRQ 11 Reserved IRQ 12 Reserved IRQ 13 Co processor IRQ 14 Fixed Disk Controller IRQ 15 Reserved IRQ 3 Serial Port 2 IRQ 4 Serial Port I IRQ 5 Parallel Port 2 IRQ 6 Diskette Controller IRQ 7 Parallel Port 1 Page 32 Appendix F APPENDIX F Temperature Calibration Procedure Detailed below is the test and calibration procedure carried out by Blue Chip Technology before despatch of the WD 1 card Equipment required Method PC Computer System DVM WD 1 Card Fit the WD 1 card into the computer Connect the DVM across the terminals on the WD 1 card marked TP1 MAX and TP3 GND Run the program TEMP BAS in either the Microsoft Basic A or GWBASIC environment Read the DVM and multiply this reading by 100 to obtain the temperature in degrees C Compare this result with that displayed on the PC monitor and adjust the potentiometer and adjust the potentiometer RV3 until these two measurements are the same to within 0 25 of a degree Check the DVM reading is unaltered and if unchanged the calibration is complete If however the DVM reading differs from that originally obtained repeat 4 until the two values compare Type CTRL and Break keys
9. channel is disabled for approximately 20 seconds This allows the time for the user coding to be installed and executed Using the file created by Save Options When option 3 is selected from the Setup Options menu it generates a file containing the current selection of options This file can be used later for installing the watchdog without operator intervention This is achieved by issuing the following commands WD filename Filename should be the name of the file to which the operator saved the details This installs the watchdog TSR without prompting or displaying anything other than a Watchdog Installed message The operator can also examined the options that have been set up in this file by typing WD filename E Blue Chip Technology Ltd 01271013 doc Page 25 Page 26 Application Notes 6 0 APPLICATION NOTES 6 1 Changeover Relay The following sections are intended to show some typical applications of the WD 1 card The relay output has two diodes which allows the relay output has two diodes which allows the relay and its connections and cabling to be scrutinised as well as providing remote PC fault indications This set up will require additional remote sensing circuitry Alternatively the contacts may be arranged to energise de energise a remote relay Both configurations are shown in fig 6 1 6 2 N B NEVER apply more than 50V DC or 30 AC to the relay contacts and never exceed more than 750mA resistive current 6
10. is also provided which de energises and thus changes over contacts in the event of a fault This is ideal for remote monitoring of the PC The relay outputs include diodes which allow the relay and its remote cable assemblies to be scrutinised for damage A fault condition Blue Chip Technology Ltd 01271013 doc Page 15 Page 16 Electrical Options can also generate an interrupt Any one interrupt from 2 to 7 may be selected using LKE This interrupt is used to activate the WD 1 TSR Pop up menu Or NN SOE SED LKE with interrupt 3 selected KEEN E det Ro A IN2 IN3 IN4 IN5 IN6 IN7 N B IN3 is selected at the Blue Chip Technology factory and the WD 1 TSR software defaults to this setting 3 9 Enabling Disabling Watchdog Functions All the aforementioned WD 1 facilities can be enabled disabled by writing a mask to the WD 1 card In addition the current PC status can be read from the WD 1 card Software details of both these actions can be found in section 4 Page 16 Blue Chip Technology Ltd 01271013 doc Operating Guide Page 17 4 0 OPERATING GUIDE 4 1 Programming Guide The following guides are applicable for Microsoft BASIC A or GWBASIC The following programming functions are essential for writing to and reading from the WD 1 card a INPUT X INP P Returns the byte from port P and assigns this value to the variable X b OUTPUT OUT BD Outputs the byte D to port P 4 2 Example Programs 4 2 1 Entering the Ba
11. 17 WR B7 A D5 k 805 TEMP 117 7 f pe u D Ee ADOSEL 86 222 Een ADEL D4 BD4 EXT as x 1 o a ASI st Dr EE ke 803 PC BUS D3 LS245 803 Ga MOUNTED 2 Ca 855 P dE Ze Dy Ku E TEMP 74 R20 ZN449 8D4 R24 2k cK B4 D2 A 802 ak7 H5 3 14 E 18 Vout c14 edi B3 BOS DI i gl BDI R9 es 3 sjrer PS A8 LT 3 17 a 100p a2 mm BDO RV3 R27 180k gt RVI 5k AG A9 ZT 10k Bi BD7 e 11 12V M 1 R25 R28 SV Vrefin Vretout E A PR vo p 2 AG AG BUSY GND 3908 814 LT Te ja i A i PC BUS Tow ADCSEL 1307 it to 1Qu y 4 18 1538 1 BUSY cred en ASE 1 PRISE 12 K 1 ne AG 3 17 1S14 3 E j POWEROK 3 R26 45v ZPOMEROK H 3 1Y3 E 4 291 RP2 T ak7 Won 8207 4 Le ac 5 6 J PAL16L8 TE ICS AO MASK A PC BUS A T sje ws C13 220p BDO auto wooc LKL L538 2 BDR 3 2 x Al BDIR ye ih MAN WATCHDOGOK 230077 515 Pr 801 i e A T 13 CIPA 6 wep DEN ki NE DE T RS345 741 E 7 13 BD2 fo of rees P R v Ri Fi s 7 np BL ES 10 L SP TIP172 8 12 BD3 a F S 1N4001 17 16 gre 5 AA i ZS 804 HETZIS 1612 LED H FALL D7 9 D Q LKF TIP1 3 7 8 LS3874 RELAY 1N4001 nl WATCHDOGOUT 805 S 73 OE ON E ZE D EXTI 11 OG V E 24 R50 j2708 eu LS14 5 me ei B05 121012 R22 R TRS R31 e R I gt njo Z1X300 12V 45v LS38 1 3 1k 1 807 105 c5 si Al 68k D Q 7 tre ep 13 CLK CLR 12 sl 20 11 2 gl LKB a Q GK ZS 2 1 2 cn BEEPER ALI j Ce RIA i OFF ON RS245 001 RS x 1S38 2 o 4541 a eg 7 L514 6 i TRI Fa FANOK Ps co
12. External Isolated 5V OV Inverting Configuration Non inverting The normal input voltage for the opto isolators is SV However higher input voltages can be used if the user changes the values of resistors R37 and R38 The value of these resistors must be calculated to ensure that the current passed through the opto isolator will drop 1 5V constantly Required resistance Input Voltage 1 5 0 01 Ohms The following table gives some typical examples using preferred resistor values Input Voltage Resistor Value Page 14 Blue Chip Technology Ltd 01271013 doc Electrical Options Page 15 3 7 Patch Inputs Two further link selectable TTL inputs are provided PTCH1 amp PTCH2 for additional internal PC monitoring These connections are made by directly soldering leads into the two solder holes adjacent to links LKC amp LKD These inputs MUST be TTL compatible 5V OV with logic I 5V providing a fail condition The linking arrangement shown below and the links to ground MUST be included if these additional inputs are not required Connection for Additional Patch Inputs Connection when Patch Inputs not required 3 8 Fault Indications In the event of a fault condition several actions may result A link selectable LKB buzzer is provided for annunciation in the immediate vicinity of the PC A link selectable LKF relay
13. RINT 515 INPUT Enter the base address in decimal BASE 520 INPUT ENTER THE MASK VALUE IN DECIMAL WDMASK 530 MASK BASE 540 OUT MASK WDMASK 550 STOP Page 20 Blue Chip Technology Ltd 01271013 doc 4 2 5 Operating Guide Page 21 Typical VVatchdog Reset Software This program is designed to generate the vvatchdog reset pulses used to confirm processor integrity This subroutine should be installed in the user s own software with GOSUB commands periodically inserted into the coding The amount of allowable coding between these GOSUB commands will be governed by the speed of the user s machine the type of coding and the user s application all of which must be considered before selecting the reset delay links LKN amp LKM on the WD 1 card 10 15 20 30 40 60 70 80 90 100 1000 1010 1020 1030 INPUT Enter the base address in decimal BASE REM Example of user coding X INP B WHILE this DO that OUT here value GOSUB 1000 CALL SUBROUTINE REM more user coding GOSUB 100 CALL SUBROUTINE REM WATCHDOG RESET GENERATING SOFTWARE WDOG BASE 2 OUT WDOG 0 RETURN Blue Chip Technology Ltd 01271013 doc Page 21 Page 22 Watchdog Software 5 0 WATCHDOG TSR SOFTWARE The Watchdog Terminate and Stay Resident TSR software is run by typing WD at the DOS prompt The operator is then presented with two menus of options as follows Exit without Installing Set Port Address Se
14. Selecting the Base Port Address uu aaa aaa neneve 6 22 engt E Te salet ea E E ene te 7 3 0 ELECTRICAL OP IONS aaa nanen nenes eve ne rere zene r eee zene teen ea 10 3 1 Input Output CGonpnechons nos 10 3 2 Watchdog Channel 11 3 3 Temperature Monitor 12 3 4 Fan Speed Monttor n nenen eee ee eve evente 13 3 5 Power Supply Monitor au uuua nana aaa nese eee vene eee eee eee eee 13 3 6 Opto Isolated External Inputs seeeeeeeeeeeeeeeeeeeee neresen 13 ef Patch INPULS sara hr sit edhe E EE 15 3 8 Fault Indications sssssueerereeere eee eee e eve rene eee eee 15 3 9 Enabling Disabling Watchdog Functions kana 16 4 0 OPERATING GUIDE 17 4 1 Programming Guide 17 4 2 Example Program ai iiodudsdu ndasi dd prite den 17 5 0 WATCHDOG TSR SOFTWARE our 22 6 0 APPLICATION NOTES aa aaa aaa nanen eee eee eee zere rere eee e eee ez eteree 26 6 1 Changeover Relay aa uuuaaaaaaa nanen sene e eee eee 26 6 2 External INputS ses uu catoruse akta die 26 APPENDIX OE sh nimin nd n EE dE hodhi EEN 27 APPENDIX Borcha St i verte shua risi stusrtristus iste LEELA 29 PG XT AT Port M Derisi sis ERE EA AE AREA RAE kriterin 29 VO Address E 29 Blue Chip Technology Ltd 01271013 doc Contents APPENDIXG am 30 PC XT Interrupt Map vase ise sans bane eee nenen eee eee vene nene 30 APPENDDED case sod s ndrin d pd pd vd tie 31 AT Interrupt Map 31 APPENDIX P unten tren int itet s r est tt 32 Temperature Calibration Procedure aa u
15. Technology Ltd 01271013 doc Page 11 Page 12 Electrical Options The watchdog channel has an additional link LKL This link allows the watchdog facility to be installed automatically from start up after a preset delay to allow the system to access its software This is offered for applications where processor integrity is imperative Alternatively the watchdog facility may be installed manually i e through the WD 1 TSR software The link arrangement is as shown below Manual Set Up Automatic Set Up 3 3 Temperature Monitor The WD 1 temperature sensing circuitry serves two purposes First it provides a fault indication of the ambient temperature exceeds a precept value 37 C Second it provides an accurate temperature measurement This value is displayed in the WD 1 TSR status window and an example program can be found in section 4 2 3 showing how this value can be read The temperature sensor can be located off the WD 1 card and at a specified location within the PC using the 3 way molex connector Pin details of P3 are given below gt pasa jo aw pz Jo Toun OA Page 12 Blue Chip Technology Ltd 01271013 doc Electrical Options Page 13 3 4 Fan Speed Monitor In order to use this facility a special fan vvith a pulsed sensor output is required such as a hall effect Possible sources of such fans are ETRI and PAPST However if in doubt contact Blue Chip Technology Sales Department The fai
16. US BIT EXTERNAL INPUT 2 STATUS BIT N B All above functions are 1 Fail 0 OK ADC BUSY BIT 0 BUSY 1 NOT BUSY 6 ADC Value D7 D6 D5 D4 D3 D2 Di DO ADDRESS XX1H R O ADC VALUE Blue Chip Technology Ltd 01271013 doc Page 9 Page 10 Electrical Options 3 0 ELECTRICAL OPTIONS 3 1 Input Output Connections Two 8 way Klippon screw terminals are provided on the PC rear panel of the board for external connections The terminals are labelled in the following diagram Connector P1 TOP gt pPw Jo TL RelyCommon eC Relay Normally Closed CO Relay Normally Open po EXT pte I pp fo EXTipt JI PLP fo EKA I p PI expe PP pp jo ERE JI pp fo FEXTwe I ooo Pio NG PNG RS i Pan lo ENG Ai ppm 10 fint f PNG le SPE do MANG E IN ENE Page 10 Blue Chip Technology Ltd 01271013 doc Electrical Options Page 11 3 2 Watchdog Channel The vvatchdog channel is designed to monitor integrity by periodically receiving a reset signal from the system An example program for generating such a signal can be found in section 4 2 5 The interval between these reset signals is link selectable as indicated below Should the WD 1 card fail to receive a watchdog reset at any time during the reset period then a fault signal will be generated Delay time 20 ms Blue Chip
17. WD 1 Multi Function Watchdog Card Blue Eis Technology User Manual WD 1 User Manual Document Part N 0127 1013 Document Reference 0127 1013 Doc Document Issue Level 1 0 Manual covers PCBs identified WD 1 Rev C All rights reserved No part of this publication may be reproduced stored in any retrieval system or transmitted in any form or by any means electronic mechanical photocopied recorded or otherwise without the prior permission in writing from the publisher For permission in the UK contact Blue Chip Technology Information offered in this manual is correct at the time of printing Blue Chip Technology accepts no responsibility for any inaccuracies This information is subject to change without notice All trademarks and registered names acknowledged Blue Chip Technology Ltd Chowley Oak Tattenhall Chester Cheshire CH3 9EX Telephone 01829 772000 Facsimile 01829 772001 Amendment History Issue Issue Amendment Details Level Date 21 06 89 First draft 1 0 14 8 97 SEJ Window front cover and logo See ECN 981086 Contents INTRODUCTION usina angeles aa pa e 1 OUTLINE DESCRIPTION reen een 1 1 0 SPEGIFIGATIONS iinan neudoratese cantata nije 2 1 1 Electrical Specification aaa aaa aaa e eee vene 2 1 2 Physical Specification aaa uu uaaaaaaaaa aaa e eee eee vene 3 Electromagnetic Compatibility EM 4 EMG Specificati OM asocia 5 2 0 USER ADJUST MEN T Sauna aaa ana anen nene ere renerne 6 2 1
18. aaaaaaaaaaaaanaaannnnnnne enen 32 01271013 doc Blue Chip Technology Ltd Introduction INTRODUCTION The WD 1 card provides PC users with a way of ensuring the integrity of their machine in critical applications The card is set to port 300 Hex Providing you do not have any other cards set to this address you can immediately run the TSR software see Section 5 If you have other cards set to 300 Hex you must read section 2 1 Some features of the card however such as using the watchdog or reading the temperature require a more detailed understanding of the card and the relevant sections in this document should be read carefully The card s features are briefly discussed below and are highlighted in Figure 1 1 All 4 supply rails are continually monitored via IC1 This chip detects undervoltage Ve rails and overvoltage Ve rails and generates a fail signal if either of these conditions occurs A fan fail detection circuit is provided which requires the use of a replacement fan The fan generates a string of pulses whose frequency is proportional to the speed of the fan These pulses feed into a monostable circuit which generates a fail signal if the frequency of the pulses falls below a preset value The temperature detection circuit performs two tasks Firstly an LM35 temperature IC generates a voltage proportional to temperature This voltage is compared to a pre set voltage using IC2 and generates a fail signal if t
19. access the ADC and provide a temperature reading Program TEMP BAS Provided on Demonstration Disk REM READING THE TEMPERATURE PROGRAM INPUT Enter the base address in decimal BASE SCON BASE 1 START CONVERSATION CONTROL BIT ADDRESS ADCSEL BASE 1 ADC SELECT CONTROL BIT ADDRESS STATUS BASE STATUS REGISTER ADDRESS OUT SCON 0 START THE CONVERSATION IF INP STATUS AND amp H40 lt 1 GOTO 100 LOOP UNTIL ADC NOT BUSY C INP ADCSEL ELSE READ THE ADC TEMP C 4 CONVERT TO TEMP IN DEGREES C PRINT The temperature is TEMP degrees C FOR I 1 TO 100 NEXT DELAY GOTO 90 REPEAT N B This program will run continually and can be halted by pressing the Control CTRL and Break keys at the same time Blue Chip Technology Ltd 01271013 doc Page 19 Page 20 Operating Guide 4 2 4 Writing a Mask to the WD 1 Card This program will write a mask to the WD 1 card to enable disable the functions The program is designed to load in the decimal value of the mask byte The bit assignment of each function is listed below LDataBit Function Value Do Power 4 D3 en pe Pasi 164 To determine the value of the mask byte add the corresponding numbers of the functions to be enabled Example If the Power and Patch2 are to be enabled then the value written to the mask is 129 i e 128 1 Program MASK BAS Provided on Demonstration Disk 500 REM WRITING A MASK TO WD 1 510 PRINT P
20. again would then switch back to Disabled and so on The operator should select which of the watchdog inputs is to be enabled If the operator wants to enter a message which will be displayed if that input fails then the option is selected and M entered The operator will then be prompted by Message The message should be entered and terminated by pressing Return Selecting the M option automatically enables the appropriate input When the operator has enabled all of the required inputs and entered any messages Option 0 should be selected in order to return to the Setup Options Menu Blue Chip Technology Ltd 01271013 doc Page 23 Page 24 Watchdog Software 3 Save Options This option is selected when the operator wishes to make a copy on disk of all the options selected This copy can then be used to configure the software automatically without operator intervention When the option is selected the operator is prompted with Filename The filename should then be entered terminated by pressing Return The filename can be any legal MS DOC file specification Details of how to use this file are given at the end of the user instructions 4 Switch Bell On When this option is selected if a fault occurs and the TSR pops up the terminal bell will sound to alert the user If this option is not selected then no bell will sound 5 Interrupt No 3 This selects the number of hardware interrupt that the Watchdog car
21. d will use The software can use interrupt numbers 2 to 7 with 3 being the default Selecting this option increases the Interrupt No displayed up to 7 and after 7 goes back to 2 6 Install Watchdog TSR Option 6 should be selected when all other required options have been selected The TSR will now be installed and the operator will be returned to the DOS prompt When the Watchdog TSR is installed After the watchdog TSR is installed it will automatically pop up when one or more of the watchdog inputs develops a fault Two options are then available Firstly Q for quit this takes you out of the TSR without doing anything The watchdog will not respond to future faults and the current fault will not be cleared This option should be avoided Masking out the fault is available by typing TM This disables the faulty input and re enables the watchdog card without the faulty input Q to quit can then be safely selected Page 24 Blue Chip Technology Ltd 01271013 doc Watchdog Software Page 25 The watchdog TSR can also be popped up by typing CTRL ALT W This can be typed at any time including when another program is executing This has the same options as above but with a further option to Kill the watchdog TSR Killing involves removing the watchdog TSR software from memory and disabling the watchdog card The TSR is killed by typing CTRL K Using the Processor Watchdog On installing the TSR software the watchdog
22. e mm 10 20 40 80 100 200 Page 28 Blue Chip Technology Ltd 01271013 doc Appendix B Page 29 APPENDIX B PCIXTIAT Port Map VO Address Map Address 000 01F 020 03F 040 05F 060 06F 070 07F 080 09F 0A0 OBF OFO OF1 OF8 OFF 1F0 1F8 200 207 278 27F 2F8 2FF 300 31F 360 36F 378 37F 380 38F 3A0 3AF 3B0 3BF 3C0 3CF 3D0 3DF 3F0 3F7 3F8 3FF DMA Controller 1 8237A 5 Interrupt Controller 1 8259A Timer 8254 Keyboard Controller 8742 Control Port B RTC and CMOS RAM NMI Mask Write DMA Page Register Memory Mapper Interrupt Controller 2 8259 Clear NPX 80287 Busy Reset NPX 80287 Numeric Processor Extension 80287 Hard Disk Drive Controller Reserved Reserved for Parallel Printer Port 2 Reserved for Serial Port 2 Reserved Reserved Parallel Printer Port 1 Reserved for SDLC Communications Bisynchronous 2 Reserved for Bisynchronous I Reserved Reserved Display Controller Diskette Drive Controller Serial Port I Blue Chip Technology Ltd 01271013 doc Page 29 Page 30 Appendix C APPENDIX C PC XT Interrupt Map Number NMI NRO u Page 30 Usage Parity Timer Keyboard Reserved Asynchronous Communications Secondary SDLC Communications Asynchronous Communications Primary SDLC Communications Fixed Disk Diskette Parallel Printer Blue Chip Technology Ltd 01271013 doc Appendix D Page 31 APPENDIX D AT Interrupt Map Level Function
23. h contact Most EMC problems are caused by the external cabling to boards Itis important that any external cabling to the board is totally screened and that the screen of the cable connects to earth at both ends of the cable Itis recommended that round screened cables with braided wire screen are used in preference to those with foil screen and drain wire With the terminal block connection to the card there is no space available for an earth point on the board mounting bracket It is recommended that the screen be connected to the metal body of the PC and hence earth by the shortest possible pig tail The BCT Icon chassis has these available adjacent to the expansion area Unscreened cable will not be adequate unless it is contained wholly within the cabinetry housing the industrial PC and carefully routed Page 4 Blue Chip Technology Ltd 01271013 doc Specifications Page 5 e Ensure that the screen of the external cable is bonded to a good RF earth at the remote end of the cable Failure to observe these recommendations may invalidate the EMC compliance Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures EMC Specification A Blue Chip Technology Icon industrial PC fitted with this card meets the following specification Emissions EN 55022 1995 Radiated Class A Conducted Class A amp B Immunit
24. he temperature has exceeded 37 C Secondly this voltage is amplified and converted to a digital form via the ADC IC4 This converts this signal into a temperature value which can be displayed to the PC monitor Blue Chip Technology Ltd 01271013 doc 10 Introduction The vvatchdog channel includes a timer circuit whose timing period can be selected by the user The channel should be sent a pulse at regular intervals via the user software to indicate processor activity If the timer circuit fails to receive a pulse within the selected time period then a fault condition will be generated Use of this facility will require the user to insert the appropriate watchdog coding into his software The board is equipped with two opto inputs which can be arranged to assess various types of input signal A full description of this facility can be found in section 3 6 and application notes are given in section 6 Two additional TTL type inputs are provided for monitoring internal TTL level signals Caution should be taken to ensure correct signal compatibility All the above fail signals feed into a logic circuit which allows user to select which functions are required This selection deselection is performed by writing a masking byte to a port The address of this port is given section 2 along with its bit assignment details The current PC status can be accessed at any time by reading a port byte Details of this port can again be found in sect
25. ion 2 In the event of a fault condition the aforementioned circuit will de energise the relay activate the buzzer and generate an interrupt This interrupt is link selectable and is used to activate the pop up menu software The WD 1 has an IBM PC XT AT 386 Model 30 62 way compatible bus In addition to the TSR Software several BASIC programs are provided in the text and on the disk 01271013 doc Blue Chip Technology Ltd Outline Description Page 1 OUTLINE DESCRIPTION This card is designed to continually monitor essential PC functions such as temperature processor operating povver supplies and fan speed In addition the WD 1 has the facility to monitor two remote inputs by means of opto isolated inputs Each of the above functions can be enabled disabled to suit user requirements The card is equipped with a buzzer a relay for remote sensing and software which provides a pop up menu in the event of fault condition This menu displays the current PC status and allows the user to take appropriate action Blue Chip Technology Ltd 01271013 doc Page 1 Page 2 1 0 1 1 Page 2 Specifications SPECIFICATIONS Electrical Specification Input Connections Two opto inputs for external monitoring invert non invert link selectable Input Voltage range 3 5V 8V SV typical External opto power supply EXT INT link selectable Voltage range 3 5V 8V SV typical Sensed Fan Input Voltage Range 3 5V
26. l speed is preset to 240ppm pulses per minute i e 240rpm for a lppr fan The range of input voltages is 3 5V to 12V Connections to the fan are made via the molex header P2 as shown below EEE KE o k Pez o Sensor input from fan pov aaan Lera lo ov 3 5 Power Supply Monitor The WD 1 card senses all four supply rails 5V 5V 12V 12V The card generates a fail signal is any rail falls below 4 75V 11 65 5V 12V or rises above 4 75 11 65V 5V 12V The fail signal is cleared when the voltage rises or falls to 4 85 11 80V and 4 85V 11 80V respectively N B All the above voltage values are preset to within a tolerance of 0 03V 5V and 0 05V 12V 3 6 Opto lsolated External Inputs Two opto inputs are provided on the WD 1 card for additional monitoring of remote equipment such as power supplies relays etc These inputs can be configured for voltage level SV typically or volt free contact inputs Examples of these arrangements can be found in section 6 The opto inputs provide a link selectable internal isolated 5V OV or external 5V OV opto supply links LKM amp LKN The outputs of the opto isolators are also link selectable for inverting and no inverting input set ups links LKG amp LKH Blue Chip Technology Ltd 01271013 doc Page 13 Page 14 Electrical Options Internal External Ve Internal Isolated 5V OV Internal External Ve
27. se Address Before any read or write instructions can be performed the base address must be entered This value MUST coincide vvith that set on the card by links LKA Program BASEADD BAS Provided on Demonstration Disk 10 REM WD 1 BASE ADDRESS PROGRAM 20 CLS CLEAR SCREEN 30 INPUT ENTER BASE ADDRESS OF WD 1 CARD IN DECIMAL BASE 40 REM BASE IS THE BASE ADDRESS FOR ALL I O OPERATIONS Blue Chip Technology Ltd 01271013 doc Page 17 Page 18 4 2 2 Operating Guide Reading the VVD 1 Status The following program will access the status byte and indicate its present logic level N B Logic I indicates fault Program STAT BAS Provided on Demonstration Disk 200 210 215 216 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 390 400 410 Page 18 REM Reading the status Program PRINT PRINT INPUT Enter the base address in decimal BASE PRINT BASE PRINT PRINT Function Status STATUS BASE Status Register Address A INP STATUS Read the Status STAT 1 READ A PRINT A LEV A AND STAT IF LEV gt 0 THEN LL 1 ELSE LL 0 PRINT LL STAT STAT 2 IF STAT lt 33 GOTO 260 END REM Data String DATA POWEROK DATA WDOGOK DATA TEMPOK DATA EXT10K DATA EXT2OK DATA FANOK Blue Chip Technology Ltd 01271013 doc 4 2 3 Operating Guide Page 19 Reading the Temperature The following program will
28. t Mask Options Save Options Switch Bell on Interrupt No 3 Install Watchdog TSR Du P GA HA ra CO The operator can select an option from the menu by Typing the number of that option or Moving the Bar onto the desired option using the cursor keys and then selecting that option by hitting Return or pressing the Space Bar The Setup Options perform the follovving functions 0 Exit without Installing Returns to DOS without installing the watchdog TSR software 1 Set Port Address This option is used to change the port address of the watchdog card from its default of 300 Hex The existing port address is displayed and the operator is prompted for the new address The new address is entered in hexadecimal Page 22 Blue Chip Technology Ltd 01271013 doc Watchdog Software Page 23 2 Set Mask Options This option leads to the use of the second menu on the screen the Mask Options Menu From this menu the operator can disable and enable any of the six watchdog inputs The Mask Options Menu appears as follows 0 Back to Setup Menu 1 Temperature Disabled 2 Fan Disabled 3 Power Supply Disabled 4 Watchdog Disabled 5 External 1 Disabled 6 External 2 Disabled The operator selects the option using the same method used for the previous menu When an option is selected the menu is updated to show its current status For example if input 3 power supply was disabled then selecting Option 3 would enable it Selecting Option 3
29. to stop the program T Comparator emp ADCand Fan Fail Monitor Sensor ADjust SP Fan Input ja Opto in External Input VVatchdog Timer ih Opto in Power Supply 27 Relay H Remote Output E d 000000000 Monitor i 3 E LED Function Select Disable Address Select Bus Interface Logic UO Fig 1 Block Diagram BR ON gt 0 No an O A Lo TYPICAL REMOTE RELAY DN Cl Cl Dal DN ll WENN ON ON Cl DN Cl Cal E Fig 6 1 Using RLI to drive remote relays BR ON 0 No A x TYPICAL FAULT DETECTION CIRCUIT NON DN CNN Dall WEN CNN CNN CN CN Fig 6 2 Using RLI vvith fault detection circuitry NORMALLY OPEN FAIL CLOSED O O 2 YL RL1 Q Q NORMALLY CLOSED Z FAIL OPEN Li o o O O Le Li RL2 Fig 6 3 Remote relays with RL1 normally open and RL2 normally closed LINK FUNCTION POSITION INTERNAL 5V INTERNAL OV NORMALLY OPEN RELAY INPUT NORMALLY
30. y EN 50082 2 1995 incorporating Electrostatic Discharge EN 61000 4 2 Performance Criteria B Radio Frequency Susceptibility ENV 50140 Performance Criteria A Fast Burst Transients EN 61000 4 4 Performance Criteria B Blue Chip Technology Ltd 01271013 doc Page 5 Page 6 User Adjustments 2 0 USER ADJUSTMENTS 2 1 Selecting the Base Port Address The board may be located in any 62 pin slot in the PC mother board but must be set up to appear at a specified position or address in the port map Available positions are shown in the IBM PC Technical Reference Guide However for those vyho do not possess a copy of this document a good place is the location normally allocated to the prototyping card as supplied by IBM This address is 300 Hex or 768 decimal All Blue Chip Technology cards are preset to this address at the factory However no two devices should be used while set to the same address since contention will occur and neither board will work If your machine contains a card with a conflicting address then another reasonably safe address is 200 to 21F Hex A set of links is provided on the board to set the base address of the board within the IBM PC port map The address is in binary with the presence of a link representing a 0 and the absence of a link representing a 1 To set the base address to 768 Decimal 300 Hex set the following pattern on the links as indicated below Page 6 Blue Chip Technology Ltd
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