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Current Measurements ...................................................................................................................... 7-2

Measuring Large Voltages .................................................................................................................. 7-2

Adding More Analog Inputs ................................................................................................................ 7-2

Precautions - Noise, Ground Loops, and Overloads ........................................................................... 7-3

Chapter 8: Programmable Interval Timer ................................................................ 8-1

Operational Modes ............................................................................................................................. 8-1

Mode 0: Pulse on Terminal Count ............................................................................................... 8-1

Mode 1: Retriggerable One-Shot ................................................................................................. 8-1

Mode 2: Rate Generator .............................................................................................................. 8-2

Mode 3: Square Wave Generator ................................................................................................ 8-2

Mode 4: Software Triggered Strobe ............................................................................................. 8-2

Mode 5: Hardware Triggered Strobe ............................................................................................ 8-2

Programming ..................................................................................................................................... 8-2

Reading and Loading the Counters .................................................................................................... 8-4

Programming Examples .................................................................................................................... 8-4

Using Counter #0 as a Pulse Counter ......................................................................................... 8-4

Reading Counter #0 .................................................................................................................... 8-4

Programming Examples Using the A12DRV Driver ............................................................................. 8-4

Triggering A/D Conversions Periodically ............................................................................................. 8-5

Generating Square Waves of Programmed Frequency ....................................................................... 8-6

Measuring Frequency and Period ....................................................................................................... 8-6

Generating Time Delays .................................................................................................................... 8-6

Pulse on Terminal Count ............................................................................................................. 8-6

Programmable One-Shot ............................................................................................................. 8-6

Software Triggered Strobe ........................................................................................................... 8-6

Hardware Triggered Strobe .......................................................................................................... 8-7

Appendix A: Linearization ....................................................................................... A-1

Appendix B: Cabling and Connector Information ................................................. B-1

AD12-8 Output Connector Pin Assignments ...................................................................................... B-1

Appendix C: Basic Integer Variable Storage .......................................................... C-1

CE Declaration of Conformity

Summary of Contents for AD12-8

Page 1: ...Model AD12 8 Product Manual MANUAL NUMBER 00650 014 4C...

Page 2: ...ual in our online Support Library Thank you The information in this document is provided for reference only ICS Advent does not assume any liability arising from the application or use of the informat...

Page 3: ...Page iv This page intentionally left blank...

Page 4: ...ts which are not in an as new and re saleable condition are not eligible for credit return and will be returned to the customer Limited Warranty Effective April 1 1998 all products carry a 2 year limi...

Page 5: ...made by various manufacturers in performing warranty repairs and building replacement products If ICS Advent repairs or replaces a product its warranty term is not extended ICSAdvent will normally re...

Page 6: ...Cautions and Warnings are accented with triangular symbols The exclamation symbol is used in all cautions and warnings to help alert you to the important instructions The lightning flash symbol is us...

Page 7: ...Page viii This page intentionally left blank...

Page 8: ...O 1 5 Interrupt Channel 1 5 Programmable Timer 1 6 Environmental 1 6 How to remain CE Compliant 1 6 Chapter 2 Software 2 1 Software Provided 2 1 Backing up the Master Diskettes 2 1 Hard Disk Installat...

Page 9: ...er with Turbo Pascal 4 8 Using the Driver with QuickBASIC 4 8 Using the Driver with BASIC 4 9 Chapter 5 AD12 8 Driver Reference 5 1 Using the Driver 5 1 The Point List Concept 5 1 Other Software Featu...

Page 10: ...s 6 7 AD128_ResetListIndex 6 7 AD128_ClearPointList 6 7 AD128_DelPtListIndexes 6 8 AD128_SetSettleTime 6 8 AD128_GetNextPoint 6 8 AD128_GetIndexPoint 6 9 AD128_GetDirectPoint 6 9 AD128_IRQTerminate 6...

Page 11: ...and Loading the Counters 8 4 Programming Examples 8 4 Using Counter 0 as a Pulse Counter 8 4 Reading Counter 0 8 4 Programming Examples Using theA12DRV Driver 8 4 TriggeringA D Conversions Periodical...

Page 12: ...k Diagram 1 4 Figure 3 1 Option Selection Map 3 1 Figure 3 2 Standard BaseAddressAssignments for PC and PC XT Computers 3 3 Figure 3 3 BaseAddress Example 3 4 List of Tables Table 2 1 Configuration Fi...

Page 13: ...nable Input System Expansion The AD12 8 card may be used alone or it can support up to eight AT16 P or LVDT8 P analog input expansion cards An 8 bit standard LSTTL logic output from the AD12 8 is used...

Page 14: ...cycle c The writing of a command word to the card That is either updating the gain or channel selection multiplexer on the AT16 P expansion card or the AD12 8 multiplexer Utility Software Utility soft...

Page 15: ...1 2 5 10 25 50 100 200 500 and 1000 In addition these gains can be software programmed to provide individual gains on a channel by channel basis For thermocouple measurements a cold junction sensor i...

Page 16: ...ual 5 92 7 5 92 7 287387 7 67 57 7 705 2 17 55837 2 1387 7 7 8 5 7 219 57 5 6 03 5 66 2 8 2 08 21752 7 2 08 7 7 2 6 1 2 1387 23 23 23 23 08 6 7 08 1 6 7 1 1 1 17 55837 9 75 75 2 7 287387 7 287387 2 28...

Page 17: ...16 P 90 dB when gain 1 125 dB when gain 100 Throughput 35 microseconds maximum Reference Voltage Output Voltage 10 0VDC 0 1VDC at up to 220mA Digital I O Inputs Logic high 2 4 to 5 0 VDC at 0 4mA sour...

Page 18: ...n CE compliant only CE compliant parts may be used To keep a chassis compliant it must contain only compliant cards and for cards to remain compliant they must be used in compliant chassis Any modific...

Page 19: ...led A12DRV OBJ All forms of the driver were created using Turbo Assembler by Borland e Sample programs in QuickBASIC B Samples C C Samples and Pascal P Samples f A VisualBASIC Utility driver g A Micro...

Page 20: ...MPLES Contains the BASIC and QuickBASIC samples as well as the binary and linkable drivers VBWIN Contains the Windows Visual BASIC samples CPPWIN Contains the Windows C samples Configuration File The...

Page 21: ...ng or as a binary string A decimal string is any string of digits made up of the digits 0 through 9 as follows Decimal format DDDDD e g 768 Hexadecimal strings consist of a string of digits containing...

Page 22: ...channel is to have automatic gain ranging Note that the AIM 16 gain switches must be set for programmable gain for automatic gain ranging to work properly 0 1 2 3 4 5 6 7 The channel is to be set to t...

Page 23: ...of a DLL a GBL and a VisualBASIC sample Together these files allow you to access the port and main memory space in a fashion similar to BASIC QuickBASIC Pascal C C Assembly and most other stan dard la...

Page 24: ...values sent less intuitive All integers in BASIC are signed numbers wherein data are stored in two s complement form All bit patterns must be converted to and from this two s complement form if meanin...

Page 25: ...TER 1 FUNCTIONAL DESCRIPTION for an understanding of the counter timer configuration and to CHAPTER 8 PROGRAMMABLE INTERVAL TIMER for a description of applications Counter 0 is fully accessible to you...

Page 26: ...external interrupts The end of conversion interrupt is supported by the AD12 8 software drivers If you desire to use external interrupts then you must supply your own interrupt service routine NOTE T...

Page 27: ...ing is separate from I O addressing so there is no possible conflict with any add on memory that may be installed in your computer We urge that you carefully review the address assignment table before...

Page 28: ...be used together addresses overlap H 5DQJH 8VDJH QWHUQDO 6 VWHP 1RW 8VDEOH 7 DUG LVN DPH RQWURO 3DUDOOHO 3RUW 37 XV 0RXVH V QFKURQRXV RPPXQLFDWLRQV 20 V QFKURQRXV RPPXQLFDWLRQV 20 3URWRW SH DUG 7 DUG...

Page 29: ...ary representation from step 1 3 Note from FIGURE 3 3 that switch position A9 corresponds to the most significant bit in your binary representation For each bit in your binary representation if the bi...

Page 30: ...ows Calibration and Test All cards are calibrated prior to shipment However periodic calibration of AD12 8 is recom mended to retain full accuracy The calibration interval depends to a large extent on...

Page 31: ...range These settings are used by the calibration portion of the program 3 Use the arrow key to select option 7 Calibrate A D then press the ENTER key 4 Use the arrow key to select option 1 Adjust Off...

Page 32: ...r program using the supplied drivers AD12 8 Register Address Map The AD12 8 uses eight consecutive addresses in I O space as follows 5 67 5 5 66 5 81 7 21 5 7 81 7 21 6 5 66 RZ WH ELW LJLWDO 2XWSXW 6...

Page 33: ...igital output lines whose primary purpose is to select one of eight gains on the AT16 P analog input expansion card Status Register The Status register provides information about the operation of the...

Page 34: ...AD11 is the most significant bit Base 1 Write A write to this location starts an A D conversion The data written is irrelevant This causes the EOC bit of the status register to go high until the conve...

Page 35: ...ten first followed by the most significant byte When reading the current count of the counter is read The type of transfer is also set by the control byte Additional information about the type 8253 co...

Page 36: ...3URJUDP RXQWHU 3URJUDP RXQWHU 5HDG DFN RPPDQG RW0 RW1 These bits select the read write mode of the selected counter 5 5 RXQWHU 5HDG ULWH XQFWLRQ RXQWHU DWFK RPPDQG 5HDG ULWH 6 WH 5HDG ULWH 06 WH 5HDG...

Page 37: ...es which are defined as follows task The number of the task to perform A reference with a list of tasks for each driver are provided in CHAPTER 5 AD12 8 DRIVER REFERENCE parameters This is an array of...

Page 38: ...les as desired for the function you wish to perform See CHAPTER 5 DRIVER REFERENCE for details on each task D Make the call to the driver passing the offset of each parameter a12drv FP_OFF task FP_OFF...

Page 39: ...river globally at the beginning of the program type param_array array 1 5 of integer var params param_array task status integer C Declare the driver function as external in using a prototype declarati...

Page 40: ...explicitly pass the offset of the array variable CALL A12DRV TASK VARPTR PARAM 1 STAT F To use the program and driver in the environment you must link a Quick Library Perform the following command fro...

Page 41: ...at offset 0 within the defined segment 40 DRIVER 0 50 BLOAD a12drv bin DRIVER Make your assignment to these variables as desired for the function you wish to perform See CHAPTER 5 DRIVER REFERENCE fo...

Page 42: ...ample the order could be 15 12 12 11 9 127 1 1 0 etc The order that point addresses are installed in the point list is the order in which you call the driver to install them Each new entry is appended...

Page 43: ...e buffered TASK 17 Fetch Multiple Points High Performance point list and gains are used but function assignments are not Task Reference Task 0 Initialize This task provides the driver with information...

Page 44: ...Codes status 0 No error status 1 Invalid task number task 17 or driver not initialized status 2 Invalid base address params 0 0x3f8 or 0x200 status 3 Card does not respond status 15 Voltage range not...

Page 45: ...not initialized status 3 Card does not respond Example int task params 5 status these are globally declared variables task 1 a12drv FP_OFF task FP_OFF params FP_OFF status call the driver Task 2 Fetc...

Page 46: ...1 Invalid task number task 17 or driver not initialized status 5 Invalid point address or index Example int task params 5 status these are globally declared variables task 3 params 0 6 fetch point ad...

Page 47: ...best resolution Input params 0 First point in point address range params 1 Last point in point address range params 2 Gain code to assign Output Data None Error Codes status 0 No error status 1 Inval...

Page 48: ...int address then the driver will install them in descending order 3 Point addresses that are not on a 16 boundary 0 16 32 48 etc are only meaningful if one or more AT16 Ps or LVDT8 Ps are attached Inp...

Page 49: ...2 Gain code used ERROR CODES status 0 No error status 1 Invalid task number task 17 or driver not initialized status 3 Card does not respond status 5 Invalid point address or index Example int task pa...

Page 50: ...t list by TASK 11 SUBTASK 1 2 This task uses two buffers a data buffer and a point gain buffer Both buffers should be integer buffers of the same length The number of conversions must not exceed the l...

Page 51: ...be reset to the beginning of the point list by TASK 11 2 The initial call to SUBTASK 1 passes a pointer to a data buffer to store he conversion This buffer is used as temporary storage by the driver...

Page 52: ...s 4 Segment of the packed data buffer address params 5 A D Trigger mode 2 Check for end of interrupt scan 3 Return unpacked data params 1 Offset of data buffer params 2 Offset of point gain buffer par...

Page 53: ...d counts to be multiplied by 16 if using the bipolar mode and multiplied by 8 if using a unipolar mode 2 Curves are assigned to a point address by calling SUBTASK 2 with the ASCII code of one of the c...

Page 54: ...sors with 392 alpha and u for sensors with 385 alpha 9 TASK 10 does not initiate any conversions but sets up functions that will be performed automatically whenever conversion are done using tasks 6 7...

Page 55: ...tus 16 Invalid curve Example int task params 5 status these are globally declared variables task 10 linearize the passed value params 0 1 manual linearization subtask params 1 t for t type thermocoupl...

Page 56: ...ple and hold settle time Notes 1 SUBTASK 5 is provided to set the sample and hold settle time High speed 80286 80386 and 80486 computers often will start a conversion before the sample and hold has ha...

Page 57: ...range If a value greater than eight bits is sent the driver will only send the lower eight bits Input params 0 Value to output Output Data None Error Codes status 0 No error status 1 Invalid task num...

Page 58: ...r Setup Load the given counter timer with a count value and mode Notes 1 For a complete discussion of the counter timers see CHAPTER 8 PROGRAMMABLE INTERVAL TIMER Input params 0 counter number 0 1 or...

Page 59: ...task 17 or driver not initialized status 8 Invalid counter not 0 1 or 2 Example int task params 5 status these are globally declared variables task 15 params 0 1 counter 1 a12drv FP_OFF task FP_OFF pa...

Page 60: ...tatus call the driver Task 17 High Speed Conversions Multiple Point Addresses Fetch multiple conversions from the point list using pipelining features of the AD12 8 Notes 1 The point list is used to d...

Page 61: ...f conversions completed The buffers will contain the conversions and the point gain data respectively Error Codes status 0 No error status 1 Invalid task number task 17 or driver not initialized statu...

Page 62: ...ter timer number is not 0 1 or 2 9 Invalid mode The counter timer mode does not fall within the range of 0 through 5 10 Interrupt process already set The interrupt process can only be set up once A su...

Page 63: ...d to use it then use auto configura tion when you initialize the driver All points will be set up for gain and curves and installed in the point list Using the Driver The following are the steps that...

Page 64: ...return an error if you attempt to convert a point before setting it up with a call to AD128_SetPointConfig Install the desired points into the point list There is a single point list in the system The...

Page 65: ...fered data acquisition using interrupts AD128_PollScan Performs buffered data acquisition using polling AD128_PostProcess Processes and returns data from a batch process AD128_FetchLastGain Fetches th...

Page 66: ...ntConfig Function Initializes a range of points for curve scaling gain and units Syntax Visual BASIC AD128_SetPointConfig Byval start as Integer Byval stop as Integer Byval curve as Integer Byval low...

Page 67: ...than pass zero for the hi and low parameters If a curve is desired then it is recommended that you do not use scaling If values are passed for hi and low then the driver will scale the results after...

Page 68: ...t up for a given point Syntax Visual BASIC AD128_FetchPointConfig Byval addr as integer curve as Integer low as Single hi as Single units as Integer gain as Integer as Integer C int PASCAL AD128_Fetch...

Page 69: ...t error AD128_ResetListIndex Function Resets the point list index pointer to the first point in the point list Syntax Visual BASIC AD128_ResetListIndex as Integer C int PASCAL AD128_ResetListIndex Not...

Page 70: ...ge for the gain used in the preceding conversion the sample and hold circuitry many need extra time to sample This is normally in cases when the gains vary widely from channel to channel Symptoms of a...

Page 71: ...ed then the fifth entry in the point list is converted Error Codes INVALID_PTR One or more of the return pointers is invalid LIST_ERROR The point location was not found POINT_UNINSTALL The next point...

Page 72: ...or equal to the values you passed to AD128_IRQScan then the process is complete Error Codes INVALID_PTR One or more of the return pointers is invalid AD128_SUCCESS Operation was performed without erro...

Page 73: ...n the hWnd parameter than the driver will post a message to that window upon completion of all conversions If you do not wish to use this feature pass a 0 in Visual BASIC or a NULL in C Alternatively...

Page 74: ...e call to AD128_PostProcess should have identical values for scans convs and index as the call to AD128_ PollScan Error Codes LIST_EMPTY The point list is empty INVALID_CONV The scans and or convs par...

Page 75: ...CTIVE The card does not respond no EOC AD128_SUCCESS Operation was performed without error AD128_FetchLastGain Function Fetches the last gain code used for a given point Syntax Visual BASIC AD128_Fetc...

Page 76: ...mmable by jumper selection on the card See CHAPTER THREE HARDWARE CONFIGURATION AND INSTALLATION for details Error Codes INVALID_PTR The gain code pointer is invalid AD128_SUCCESS Operation was perfor...

Page 77: ...he error decreases for example at 10KHz the error is only 0 3 The frequency range for this function is 0 001 to 100kHz Error Codes AD128_SUCCESS Operation was performed without error INVALID_PTR The p...

Page 78: ...buffer was empty 16 INVALID_PTR A pointer passed to the driver for returning data was not a valid pointer 17 GAIN_ERROR A gain code passed to the driver was not between zero and eight 18 UNIT_ERROR A...

Page 79: ...ombination the common mode limit is 10V It s important to understand the difference between input types how to use them effectively and how to avoid ground loops Misuse of inputs is the most common di...

Page 80: ...area with plated through holes that allow insertion of shunt resistors If an AT16I P multiplexer expansion card is being used pre wired pads are provided on the AT16I P If all the inputs are 4 20mA ra...

Page 81: ...loose and short to high voltages c Use isolation amplifiers and transformers where necessary There are two types of ground connections on the rear connector of AD12 8 These are called Power Ground and...

Page 82: ...ter 2 are used to initiate A D conversions if the TMR EXT jumper is in the TMR position Operational Modes The 8253 modes of operation are described in the following paragraphs to familiarize you with...

Page 83: ...s and decre ments by two for the second part of the wave form Mode 4 Software Triggered Strobe This mode sets the output high and when the count is loaded the counter begins to count down When the cou...

Page 84: ...HU 3URJUDP RXQWHU 3URJUDP RXQWHU 5HDG DFN RPPDQG RW0 RW1 These bits select the read write mode of the selected counter 5 5 RXQWHU 5HDG ULWH XQFWLRQ RXQWHU DWFK RPPDQG 5HDG ULWH 6 WH 5HDG ULWH 06 WH 5H...

Page 85: ...ion that you intend to perform You have a choice of loading reading a the high byte of the count or b the low byte of the count or c the low byte followed by the high byte Programming Examples Using C...

Page 86: ...erval timer is to provide start pulses for periodic sampling The TMR EXT jumper should be in the TMR position You can set up an output frequency by using Task 14 to load Counters 1 and 2 with the requ...

Page 87: ...The counter is then read and the change in counts is a linear function of the duration of the gate input signal If Counter 0 receives 10 microsecond duration clock pulses 100 KHz the maximum pulse du...

Page 88: ...mable One Shot except that when the counter is triggered by the gate going high the counter output immediately goes high then goes low for one clock period at timeout producing a negative going strobe...

Page 89: ...ternal Win32IRQ dll index 1 function DetectIRQ Boolean stdcall external Win32IRQ dll index 2 function SendEOI Boolean stdcall external Win32IRQ dll index 3 In C the library file Win32IRQ lib must firs...

Page 90: ...ogram needs to continue running while waithing for DetectIRQ a separate thread should be spawned from which to call DetectIRQ The return result is TRUE if an IRQ was successfully detected on the given...

Page 91: ...OLY and ENTER at the command line The program will then prompt you for the desired order of the polynomial then the number of pairs that you wish to use to generate the polynomial You then enter the d...

Page 92: ...0 for the negative side and a QUALITY of 0 005131 for the positive side Thus by using two polynomials you have made the positive side very accurate and dramatically improved the negative side Accuracy...

Page 93: ...W RU RXWSXW 75 287 RXQWHU 2XWSXW 1 RZ HYHO QDORJ URXQG 95 9 P UHIHUHQFH RXWSXW 9 9 3RZHU IURP WKH RPSXWHU XV 75 7 RXQWHU DWH 75 7 RXQWHU DWH 75 287 RXQWHU 2XWSXW 17 QWHUUXSW LQSXW SRVLWLYH HGJH WULJJH...

Page 94: ...nsigned numbers in the range 32 768 to 65 535 If you wish to input or output an unsigned integer greater than 32 767 then it is necessary to work out what its 2 s complement signed equivalent is For e...

Page 95: ...995RadiatedRFFieldImmunity EN61000 4 4 1995EFTImmunityforACandI OLines EN 60950 1992 Safety of InformationTechnology Equipment Thetechnicaldocumentationrequiredtodemonstratethisproductmeetstherequirem...

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