Manuale d’uso / di manutenzione del prodotto PC-LPM-16/PnP del fabbricante National Instruments
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PC-LPM-16/PnP User Manual Multifunction I/O Board for the PC November 1996 Edition Part Number 320287C-01 Copyright 1990, 1996 National Instruments Corporation.
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Important Information Warranty The PC-LPM-16 and PC-LPM-16PnP are warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period.
National Instruments Corporation v PC-LPM-16/PnP User Manual Table of Contents About This Manual Organization of This Manua l ........................................................................................ . ix Conventions Used in This Manua l .
T able of Contents PC-LPM-16/PnP User Manual vi National Instruments Corporation Analog Input Circuitry .................................................................................... 3-5 Data Acquisition Timing Circuitry ....................
T able of Contents National Instruments Corporation vii PC-LPM-16/PnP User Manual Glossary Index Figures Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware ..................................................
T able of Contents PC-LPM-16/PnP User Manual viii National Instruments Corporation Tables Table 4-1. Signal Connection Descriptions ............................................................ 4-3 Table C-1. Comparison of Characteristics .........
National Instruments Corporation ix PC-LPM-16/PnP User Manual About This Manual This manual describes the mechanical and electrical aspects of the PC-LPM-16PnP and contains information concerning its installation, operation, and programming.
About This Manual PC-LPM-16/PnP User Manual x National Instruments Corporation • Appendix C , Using Your PC-LPM-16 (Non-PnP) Board , describes the differences between the PC-LPM-16PnP and the PC-LPM-16 non-PnP boards, the PC-LPM-16 board configuration, and installing the PC-LPM-16 into your computer.
About This Manual National Instruments Corporation xi PC-LPM-16/PnP User Manual Non-PnP Non-PnP (non-Plug and Play) means that the board requires you to manually configure the product’s base address and interrupt level with switches and jumpers.
About This Manual PC-LPM-16/PnP User Manual xii National Instruments Corporation installation and configuration instructions, specification information about your DAQ hardware, and application hints.
National Instruments Corporation 1-1 PC-LPM-16/PnP User Manual Introduction Chapter 1 This chapter describes the PC-LPM-16/PnP, lists what you need to get started, software programming choices, and optional equipment, and explains how to unpack the PC-LPM-16/PnP.
Chapter 1 Introduction PC-LPM-16/PnP User Manual 1-2 National Instruments Corporation What You Need to Get Started To set up and use your PC-LPM-16/PnP board, you will need the following: ❏ PC-L.
Chapter 1 Introduction National Instruments Corporation 1-3 PC-LPM-16/PnP User Manual included with the NI-DAQ software kit. The LabWindows/CVI Data Acquisition Library is functionally equivalent to the NI-DAQ software.
Chapter 1 Introduction PC-LPM-16/PnP User Manual 1-4 National Instruments Corporation Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware Register-Level Programming The final option for programming any National Instruments DAQ hardware is to write register-level software.
Chapter 1 Introduction National Instruments Corporation 1-5 PC-LPM-16/PnP User Manual Optional Equipment National Instruments offers a variety of products to use with your PC-LPM-16/PnP board, inc.
Chapter 1 Introduction PC-LPM-16/PnP User Manual 1-6 National Instruments Corporation The mating connector for the PC-LPM-16/PnP is a 50-position, polarized, ribbon socket connector with strain relief. National Instruments uses a polarized (keyed) connector to prevent inadvertent upside-down connection to the PC-LPM-16/PnP.
National Instruments Corporation 2-1 PC-LPM-16/PnP User Manual Installation and Configuration Chapter 2 This chapter describes the installation and configuration of the PC-LPM-16PnP. For information on installing and configuring the PC-LPM-16, a non-PnP board, refer to Appendix C, Using Your PC-LPM-16 (Non-PnP) Board .
Chapter 2 Installation and Configuration PC-LPM-16/PnP User Manual 2-2 National Instruments Corporation Software Installation If you are using NI-DAQ, refer to your NI-DAQ release notes to install your driver software. Find the installation section for your operating system and follow the instructions given there.
Chapter 2 Installation and Configuration National Instruments Corporation 2-3 PC-LPM-16/PnP User Manual Base I/O Address and Interrupt Selection You can configure your PC-LPM-16PnP to use base addresses in the range of 100 to FFF0 hex. The PC-LPM-16PnP occupies 16 bytes of address space and must be located on a 16-byte boundary.
National Instruments Corporation 3-1 PC-LPM-16/PnP User Manual T heory of Operation Chapter 3 This chapter includes an overview of the PC-LPM-16PnP board and explains the operation of each functional unit making up the board. This chapter also explains the basic operation of the PC-LPM-16PnP circuitry.
Chapter 3 Theory of Operation PC-LPM-16/PnP User Manual 3-2 National Instruments Corporation Figure 3-1. PC-LPM-16PnP Block Diagram PC I/O Channel PC I/O Channel Interface Plug and Play .
Chapter 3 Theory of Operation National Instruments Corporation 3-3 PC-LPM-16/PnP User Manual PC I/O Channel Interface Circuitry The PC I/O channel interface circuitry consists of an address bus, a data bus, interrupt lines, and several control and support signals.
Chapter 3 Theory of Operation PC-LPM-16/PnP User Manual 3-4 National Instruments Corporation request lines available: IRQ3, IRQ4, IRQ5, IRQ6, IRQ7, and IRQ9.
Chapter 3 Theory of Operation National Instruments Corporation 3-5 PC-LPM-16/PnP User Manual Analog Input Circuitry The analog input circuitry consists of an input multiplexer, a jumper- selectable gain stage, and a 12-bit sampling ADC. The 12-bit output is sign-extended to 16 bits before it is stored in a 256-word deep FIFO memory.
Chapter 3 Theory of Operation PC-LPM-16/PnP User Manual 3-6 National Instruments Corporation ADC goes through a self-calibration cycle under software control. To properly use this ADC auto-calibration feature, you need an accurate input stage that does not introduce significant offset and gain errors.
Chapter 3 Theory of Operation National Instruments Corporation 3-7 PC-LPM-16/PnP User Manual Single-Channel Data Acquisition During single-channel data acquisition, the channel-select bits in Command Register 1 select the analog input channel before data acquisition begins.
Chapter 3 Theory of Operation PC-LPM-16/PnP User Manual 3-8 National Instruments Corporation Digital I/O Circuitry The PC-LPM-16PnP has 16 digital I/O lines that are TTL-compatible. Pins DIN<0..7> of the I/O connector are digital input lines, and pins DOUT<0.
Chapter 3 Theory of Operation National Instruments Corporation 3-9 PC-LPM-16/PnP User Manual Timing I/O Circuitry The PC-LPM-16PnP uses an MSM82C53 Counter/Timer integrated circuit for data acquisition timing and for general-purpose timing I/O functions.
Chapter 3 Theory of Operation PC-LPM-16/PnP User Manual 3-10 National Instruments Corporation Figure 3-6. Counter Block Diagram Each counter has a clock input pin, a gate input pin, and an output pin labeled CLK, GATE, and OUT, respectively.
National Instruments Corporation 4-1 PC-LPM-16/PnP User Manual Signal Connections Chapter 4 This chapter describes how to make input and output signal connections to your PC-LPM-16PnP board via the I/O connector. I/O Connector Figure 4-1 shows the pin assignments for the PC-LPM-16PnP I/ O connector.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-2 National Instruments Corporation Figure 4-1. PC-LPM-16PnP I/O Connector Pin Assignments +5 V GA TE2 CLK1 OUT1 OUT0 EXTINT* DOUT7 DOUT5 DO.
Chapter 4 Signal Connections National Instruments Corporation 4-3 PC-LPM-16/PnP User Manual Signal Connection Descriptions Table 4-1. Signal Connection Descriptions Pin Signal Reference Description 1–2 AIGND N/A Analog Input Ground—The pins are connected to the analog input ground signal.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-4 National Instruments Corporation 40 EXTCONV* DGND External Convert Signal—This input signal externally initiates an A/D conversion. 41 OUT0 DGND Output of Counter 0—This signal outputs the programmed waveform of counter 0.
Chapter 4 Signal Connections National Instruments Corporation 4-5 PC-LPM-16/PnP User Manual The connector pins can be grouped into categories of analog input signal pins, digital I/O signal pins, and timing I/O signal pins. Signal connection guidelines for each of these groups follow.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-6 National Instruments Corporation Figure 4-2. Analog Input Signal Connections Digital I/O Signal Connections See Table 4-1 for the digital I/O pin descriptions. The following specifications and ratings apply to the digital I/O lines: • Absolute maximum +7.
Chapter 4 Signal Connections National Instruments Corporation 4-7 PC-LPM-16/PnP User Manual Figure 4-3. Analog Input Signal Connections Figure 4-3 shows the connections of the digital input port and digital output port. Digital input applications include receiving TTL signals and sensing external device states such as the switch in Figure 4-3.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-8 National Instruments Corporation fuse in series. Both fuses are self-resetting; simply remove the circuit causing the heavy current load and the fuse will reset itself. Power Rating The following table shows the maximum current for each power line at the I/O connector.
Chapter 4 Signal Connections National Instruments Corporation 4-9 PC-LPM-16/PnP User Manual Figure 4-4. EXTCONV* Signal Timing General-Purpose Timing Signal Connections and General-Purpose Counter.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-10 National Instruments Corporation Figure 4-5. Event-Counting Application with External Switch Gating Perform pulse-width measurement by level gating to trigger the counter. Apply the pulse to be measured to the counter GATE input.
Chapter 4 Signal Connections National Instruments Corporation 4-11 PC-LPM-16/PnP User Manual duration. In this case, program the counter to count falling edges at the CLK input while the gate is applied. The frequency of the input signal then equals the count value divided by the gate period.
Chapter 4 Signal Connections PC-LPM-16/PnP User Manual 4-12 National Instruments Corporation MSM82C53 digital input specifications (referenced to DGND): •V IH input logic high voltage 2.2 V min •V IL input logic low voltage 0.8 V max • Input load current ± 10.
National Instruments Corporation A-1 PC-LPM-16/PnP User Manual Specifications Appendix A This appendix lists the PC-LPM-16PnP specifications. These specifications are typical at 25 ° C unless otherwise specified. The operating temperature range is 0 ° to 70 ° C.
Appendix A Specifications PC-LPM-16/PnP User Manual A-2 National Instruments Corporation Gain error (relative to calibration reference) After calibration 0 to 5 V and ± 5 V range ............... ± 1.0 LSB typ, ± 2.0 LSB max All other ranges ..
Appendix A Specifications National Instruments Corporation A-3 PC-LPM-16/PnP User Manual Timing I/O Number of channels ........................... 3 counter/timers (1 dedicated to analog input) Resolution .........................................
Appendix A Specifications PC-LPM-16/PnP User Manual A-4 National Instruments Corporation Bus Interface Type.................................................... Slave Power Requirement +5 VDC ( ± 10%).................................. 50 mA typ +12 VDC ( ± 5%).
Appendix A Specifications National Instruments Corporation A-5 PC-LPM-16/PnP User Manual sum of quantization uncertainty and A/D conversion error does not exceed a given amount. Integral nonlinearity in a ADC is an often ill-defined specification that is supposed to indicate a converter’s overall A/D transfer linearity.
Appendix A Specifications PC-LPM-16/PnP User Manual A-6 National Instruments Corporation To illustrate these definitions, Figure A-1 shows a portion of the analog-input-to-digital-output transfer curve for an ideal, ADC overlaid on the transfer curve of a hypothetical, typical, ADC.
© National Instruments Corporation B-1 PC-LPM-16/PnP User Manual Appendix B MSM82C53 Data Sheet This appendix contains a manufacturer data sheet for the M SM82C53* CMOS programmable int erval timer (OKI Semiconductor) . This timer is used on the PC-LPM-16PnP board.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-2 © National Instruments Corporation.
Appendix B MSM82C53 Data Sheet © National Instruments Corporation B-3 PC-LPM-16/PnP User Manual.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-4 © National Instruments Corporation.
Appendix B MSM82C53 Data Sheet © National Instruments Corporation B-5 PC-LPM-16/PnP User Manual.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-6 © National Instruments Corporation.
Appendix B MSM82C53 Data Sheet © National Instruments Corporation B-7 PC-LPM-16/PnP User Manual.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-8 © National Instruments Corporation.
Appendix B MSM82C53 Data Sheet © National Instruments Corporation B-9 PC-LPM-16/PnP User Manual.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-10 © National Instruments Corporation.
Appendix B MSM82C53 Data Sheet © National Instruments Corporation B-11 PC-LPM-16/PnP User Manual.
Appendix B MSM82C53 Data Sheet PC-LPM-16/PnP User Manual B-12 © National Instruments Corporation.
National Instruments Corporation C-1 PC-LPM-16/PnP User Manual Using Your PC-LPM-16 (Non-PnP) Board Appendix C This appendix describes the differences between the PC-LPM-16PnP and the PC-LPM-16 non-PnP boards, the PC-LPM-16 board configuration, and installing the PC-LPM-16 into your computer.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-2 National Instruments Corporation Data FIFO Size 16 words 512 words 256 words Dummy reads to A/D and FIFO high-byte an.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board National Instruments Corporation C-3 PC-LPM-16/PnP User Manual To determine which PC-LPM-16 board you have, refer to the Assembly Number row in Table C-1 and compare it to the assembly number displayed on your circuit board (see Figure C-1).
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-4 National Instruments Corporation Configuration and Installation of the PC-LPM-16 (non-PnP) Board Configuration The PC-LPM-16 contains three jumpers and one DIP switch to configure the PC bus interface and analog input settings.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board National Instruments Corporation C-5 PC-LPM-16/PnP User Manual Figure C-1. PC-LPM-16 Parts Locator Diagram 1W 3 2 Switch U26 3W 2 4W 1 5 Serial Num.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-6 National Instruments Corporation Base I/O Address Selection The base I/O address for the PC-LPM-16 is determined by the switches at position U26 (see Figure C-2). The switches are set at the factory for the base I/O address hex 260.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board National Instruments Corporation C-7 PC-LPM-16/PnP User Manual Each switch in U26 corresponds to one of the address lines A9 through A5. Slide the switch to the side labeled A9 to A5 to select a binary value of zero for the corresponding address bit.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-8 National Instruments Corporation possible switch settings, the corresponding base I/O address, and the base I/O address space used for that setting.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board National Instruments Corporation C-9 PC-LPM-16/PnP User Manual Note: Base I/O address values hex 000 through 0FF are reserved for system use. Base I/O address values hex 100 through 3FF are available on the I/O channel.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-10 National Instruments Corporation Figure C-3. Interrupt Jumper Setting IRQ5 (Factory Setting) If you do not want to use interrupts, set the jumper on W3 as shown in Figure C-4.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board National Instruments Corporation C-11 PC-LPM-16/PnP User Manual Figure C-5. Bipolar Input ( ± 5 V) Jumper Configuration (Factory Setting) Bipolar Input Selection 2 ( ± 2.5 V) Select the bipolar ( ± 2.
Appendix C Using Y our PC-LPM-16 (Non-PnP) Board PC-LPM-16/PnP User Manual C-12 National Instruments Corporation Unipolar Input Selection 2 (0 to 5 V) Select the unipolar (0 to 5 V) input configuration by using the same setting as the ± 5 V range setting shown in Figure C-5.
National Instruments Corporation D-1 PC-LPM-16/PnP User Manual Register-Level Programming Appendix D This appendix describes in detail information related to register-level programming the PC-LPM-16/PnP.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-2 National Instruments Corporation Register Size The PC-LPM-16/PnP registers are 8-bit registers.
Appendix D Register -Level Programming National Instruments Corporation D-3 PC-LPM-16/PnP User Manual Register Description Format The remainder of this appendix discusses each of the PC-LPM-16/PnP registers in the order shown in Table D-1. Each register group is introduced, followed by an individual register description.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-4 National Instruments Corporation Command Register 1 Command Register 1 indicates the input channel to be read and the interrupt enable bits.
Appendix D Register -Level Programming National Instruments Corporation D-5 PC-LPM-16/PnP User Manual Command Register 1 (Continued) 6 CNTINTEN Counter Interrupt Enable Bit—With this bit, the counter 2 output can cause interrupts. The power-on value is 0.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-6 National Instruments Corporation Command Register 1 (Continued) If SCANEN* is cleared, analog channels MA<3..0> through channel 0 are sampled. Sampling order, whether from channel 0 to MA<3.
Appendix D Register -Level Programming National Instruments Corporation D-7 PC-LPM-16/PnP User Manual Command Register 2 Command Register 2 contains only one bit that enables the auto-calibration operation of the ADC.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-8 National Instruments Corporation Command Register 2 (Continued) Bit Name Description 0 CALEN Calibration Enable Bit—If this bit is set, the auto- calibration of the 12 bit ADC is enabled.
Appendix D Register -Level Programming National Instruments Corporation D-9 PC-LPM-16/PnP User Manual Command Register 3 Command Register 3 contains other range setting configuration bits. Address: 05 (hex) Type: Write-only Word Size: 8-bit Bit Map: Bit Name Description 7–2 0 Reserved Bits—These bits must be set to zero.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-10 National Instruments Corporation Status Register 1 Status Register 1 indicates the status of the current A/D conversion. The bits in this register determine if a conversion is being performed, if data is available, if any errors have been found, and the interrupt status.
Appendix D Register -Level Programming National Instruments Corporation D-11 PC-LPM-16/PnP User Manual Status Register 1 (Continued) Bit Name Description 3 EXTINT* External Interrupt Status Bit—This bit reflects the status of the EXTINT* signal on the I/O connector.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-12 National Instruments Corporation 0 DAVAIL Data Available Bit—This bit indicates whether conversion output is available. If this bit is set, the ADC is finished with the last conversion and the result can be read from the FIFO.
Appendix D Register -Level Programming National Instruments Corporation D-13 PC-LPM-16/PnP User Manual Status Register 2 Status Register 2 contains supplementary error information. This register is only on the PC-LPM-16PnP. Address: 01(hex) Type: Read-only Word Size: 8-bit Bit Map: Bit Name Description 7–2 X Don’t care bits.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-14 National Instruments Corporation Analog Input Register Group The three registers that make up the Analog Input Register Group control the analog input circuitry and can be used to read the FIFO.
Appendix D Register -Level Programming National Instruments Corporation D-15 PC-LPM-16/PnP User Manual A/D FIFO Low-Byte Register and A/D FIFO High-Byte Register The 13-bit A/D conversion results are sign-extended to 16-bit data in two’s complement format and are stored in a 16-word deep A/D FIFO buffer.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-16 National Instruments Corporation A/D FIFO Low-Byte Register and A/D FIFO High-Byte Register (Continued) Bit Name Description High Byte 7–0 D<15.
Appendix D Register -Level Programming National Instruments Corporation D-17 PC-LPM-16/PnP User Manual A/D Clear Register Write to this register to reset the ADC. This operation clears the data FIFO. All error bits in the Status Register are cleared as well.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-18 National Instruments Corporation Counter/Timer (MSM82C53) Register Group The five registers making up the Counter/Timer Register Group access the onboard MSM82C53 counter/timer.
Appendix D Register -Level Programming National Instruments Corporation D-19 PC-LPM-16/PnP User Manual Counter 0 Data Register Use the Counter 0 Data Register to load and read back contents of MSM82C53 counter 0. Address: Base address + 08 (hex) Type: Read-and-write Word Size: 8-bit Bit Map: Bit Name Description 7–0 D<7.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-20 National Instruments Corporation Counter 1 Data Register Use the Counter 1 Data Register to load and read back contents of MSM82C53 counter 1. Address: Base address + 09 (hex) Type: Read-and-write Word Size: 8-bit Bit Map: Bit Name Description 7–0 D<7.
Appendix D Register -Level Programming National Instruments Corporation D-21 PC-LPM-16/PnP User Manual Counter Mode Register The Counter Mode Register determines the operation mode for each of the three counters on the MSM82C53 chip.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-22 National Instruments Corporation Counter Mode Register (Continued) 5–4 RL<1..0> Read/Write Select Bits—These bits select data written to or read from a counter, or these bits send a Counter Latch command.
Appendix D Register -Level Programming National Instruments Corporation D-23 PC-LPM-16/PnP User Manual Counter Mode Register (Continued) 3–1 M<2..0> Counter Mode Select Bits—These bits select the counting mode of the selected counter. The following table lists six available modes and the corresponding bit settings.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-24 National Instruments Corporation Timer Interrupt Clear Register Write to the Timer Interrupt Clear Register to clear the interrupt request asserted when a low pulse is detected on the counter 2 output.
Appendix D Register -Level Programming National Instruments Corporation D-25 PC-LPM-16/PnP User Manual Digital Input Register Read the Digital Input Register to return the logic state of the I/O connector’s eight digital input lines. Address: Base address + 05 (hex) Type: Read-only Word Size: 8-bit Bit Map: Bit Name Description 7–0 D<7.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-26 National Instruments Corporation Programming Considerations Following are programming instructions for operating the circuitry on the PC-LPM-16/PnP. To program the PC-LPM-16/PnP, you must write to and read from the various registers on the board.
Appendix D Register -Level Programming National Instruments Corporation D-27 PC-LPM-16/PnP User Manual This sequence leaves the PC-LPM-16/PnP circuitry in the following state: • Counter 0 output is high. • Multichannel scan is disabled. • All interrupts are disabled.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-28 National Instruments Corporation Analog Input Circuitry Programming Sequence 1. Initiate an A/D conversion. A low to high transition on OUT0 or on EXTCONV* initiates A/D conversion.
Appendix D Register -Level Programming National Instruments Corporation D-29 PC-LPM-16/PnP User Manual A/D FIFO Output Binary Modes The A/D conversion result stored in the A/D FIFO is a 16-bit two’s complement value. It is made of 13-bit magnitude and 3-bit sign extension.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-30 National Instruments Corporation Clearing the Analog Input Circuitry Write to the A/D Clear Register to clear the analog input circuitry, which leaves the analog input circuitry in the following state: • Analog input error flag OVERFLOW is cleared.
Appendix D Register -Level Programming National Instruments Corporation D-31 PC-LPM-16/PnP User Manual after getting the required number of conversions. The number of conversions in a single data acquisition operation in this case is unlimited. Counter 0 is clocked by a 1 MHz clock upon start up.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-32 National Instruments Corporation during the programming. Write 0 to the A/D Clear Register to empty the FIFO (8-bit write), then read the low and high bytes from the A/D FIFO (PC-LPM-16 only).
Appendix D Register -Level Programming National Instruments Corporation D-33 PC-LPM-16/PnP User Manual Programming Multiple A/D Conversions Using External Timing You can use the external timing signal EXTCONV* for multiple A/D conversions. A low-to-high transition of EXTCONV* initiates an A/D conversion.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-34 National Instruments Corporation service the data acquisition, perform the following sequence until you have read the desired number of conversion results: 1. Read the Status Register 2.
Appendix D Register -Level Programming National Instruments Corporation D-35 PC-LPM-16/PnP User Manual UP/DOWN bit in Command Register 2 is cleared—the software uses the following scan sequence: channel 3, channel 2, channel 1, channel 0, channel 3, channel 2, channel 1, channel 0, channel 3, and so on.
Appendix D Register -Level Programming PC-LPM-16/PnP User Manual D-36 National Instruments Corporation Programming the MSM82C53 Counter/Timer Counters 0, 1, and 2 of the MSM82C53 counter/timer (except the CLK0 signal of counter 1) are available for general-purpose timing applications.
National Instruments Corporation E-1 PC-LPM-16/PnP User Manual Customer Communication Appendix E For your convenience, this appendix contains forms to help you gather the information necessary to help us solve your technical problems and a form you can use to comment on the product documentation.
Fax-on-Demand is a 24-hour information retrieval system containing a library of documents on a wide range of technical information. You can access Fax-on-Demand from a touch-tone telephone at (512) 418-1111. You can submit technical support questions to the applications engineering team through e-mail at the Internet address listed below.
Technical Support Form Photocopy this form and update it each time you make changes to your software or hardware, and use the completed copy of this form as a reference for your current configuration.
PC-LPM-16/PnP Hardware and Software Configuration Form Record the settings and revisions of your hardware and software on the line to the right of each item. Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your current configuration.
Documentation Comment Form National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs.
National Instruments Corporation G-1 PC-LPM-16/PnP User Manual Glossary Symbols ˚ degrees – negative of, or minus Ω ohms / per % percent ± plus or minus + positive of, or plus square root of.
Glossary PC-LPM-16/PnP User Manual G-2 National Instruments Corporation A A amperes AC alternating current ACH analog input channel signal A/D analog-to-digital ADC A/D converter AI analog input A.
Glossary National Instruments Corporation G-3 PC-LPM-16/PnP User Manual CTR counter D DAQ data acquisition DC direct current DMA direct memory access E EISA Extended Industry Standard Architecture.
Glossary PC-LPM-16/PnP User Manual G-4 National Instruments Corporation ISA Industry Standard Architecture L LED light emitting diode LSB least significant bit M m meter MB megabytes of memory MSB.
Glossary National Instruments Corporation G-5 PC-LPM-16/PnP User Manual T TTL transistor-transistor logic V V volts VDC volts direct current VI virtual instrument V IH volts, input high V IL volts, input low V in volts in V OH volts, output high V OL volts, output low a.
© National Instruments Corporation I -1 PC-LPM-16/PnP User Manual Index Numbers +5 V signal (table), 4-4 +12 V signal (table), 4-3 -12 V signal (table), 4-3 A ACH<0.
Index PC-LPM-16/PnP User Manual I -2 © National Instruments Corporation B base I/O address selection PC-LPM-16, C-5 to C-9 example switch settings (figure), C-7 PC bus interface factory settings (tab.
Index © National Instruments Corporation I -3 PC-LPM-16/PnP User Manual switch settings with corresponding base I/O address (table), C-8 to C-9 block diagram, revised, C-4 interrupt selection, C-9 to C-10 disabling interrupts (figure), C-10 IRQ5 factory setting (figure), C-10 overview, C-4 to C-5 parts locator diagram, revised, C-5 PC-LPM-16PnP.
Index PC-LPM-16/PnP User Manual I -4 © National Instruments Corporation digital I/O circuitry, 3-8 programming digital I/O circuitry, D-35 DISABDAQ bit, D-7, D-33 documentation conventions used in manual, x-xi National Instruments documentation, xi-xii organization of manual, ix-x related documentation, xii DOUT<0.
Index © National Instruments Corporation I -5 PC-LPM-16/PnP User Manual interrupt selection PC-LPM-16, C-9 to C-10 disabling interrupts (figure), C-10 IRQ5 factory setting (figure), C-10 PC-LPM-16PnP, 2-3 I/O connector exceeding maximum ratings (warning), 4-1 pin assignments (figure), 4-2 J jumper settings.
Index PC-LPM-16/PnP User Manual I -6 © National Instruments Corporation Plug and Play compatibility, 2-2 to 2-3 power connections, 4-7 power rating (table), 4-8 power requirement specifications, A-4 programming.
Index © National Instruments Corporation I -7 PC-LPM-16/PnP User Manual power rating (table), 4-8 signal descriptions (table), 4-3 to 4-4 timing connections, 4-8 to 4-12 data acquisition timing conne.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il National Instruments PC-LPM-16/PnP è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del National Instruments PC-LPM-16/PnP - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso National Instruments PC-LPM-16/PnP imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul National Instruments PC-LPM-16/PnP ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il National Instruments PC-LPM-16/PnP, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del National Instruments PC-LPM-16/PnP.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il National Instruments PC-LPM-16/PnP. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo National Instruments PC-LPM-16/PnP insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
