Advantech PCL-720 Bedienungsanleitung
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Find the Advantech PCL-720 at our website: Click HERE
Model PCL-720
Digital I/O &
Counter Card
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PCL-720 Digital I/O and Counter Card
USER'S MANUAL
Thisdocumentationiscopyrighted1990byAdvantech
Co., Ltd. All rights are reserved. Advantech Co., Ltd.
Reserves the right to make improvements in the
products described in this manual at any time without
notice.
No part of this manual may be reproduced, copied,
translated or transmitted, in any form or by any means
withoutthe prior writtenpermissionofAdvantechCo.,
Ltd. Information provided in this manual is intended to
be accurate and reliable. However, Advantech Co.,
Ltd. assumes no responsibility for its use; nor for any
infringements of rights of third parties which may
result from its use.
PC-LabCard isa trademark of Advantech Co., Ltd. IBM
and PC are trademarks of international Business
Machines Corporation. MS-DOS is a trade mark of
Microsoft Corporation. BASIC is a trademark of
Dartmouth College. Intel is a trademark of Intel
Corporation.
Part No. 2003720000 Rev. C1
Printed in Taiwan Mar. 1990
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TABLE OF CONTENTS
CHAPTER 1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . 1
1.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2. Features, Application and Specifications . . . . . . . . . . . . . . 1
CHAPTER 2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2. Base Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3. Clock Frequency Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4. Installing into the PC . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 7
CHAPTER 3 SIGNAL CONNECTION . . . . . . . . . . . . . . . . . . . . . . . 9
3.1. Connector Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2. Timer/Counter Signal Pads . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3. Clock Source Pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4. Strobe of Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CHAPTER 4 PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1. Register Structure and Format . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2. Digital UO Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3. Programmable Interval Timer . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1. The Intel 8253 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.2. The Control Byte . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.3. Mode Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.4. Loading and Reading The Counters . . . . . . . . . . . 20
APPENDIX A I/O PORTADDRESS MAP . . . . . . . . . . . . . . . . . . . . . 23
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CHAPTER 1 GENERAL INFORMATION
1.1. Introduction
The PCL-720 Digital I/O and Counter Card is a PC add-on card that offers you
32 digital input channels, 32 digital output channels and 3 counter/timer
channels. All digital input and output channels are TTL/DTL compatible.
Each digital input or output channel corresponds to a certain bit of the I/O port
of the PC and it is very easy to program the function of this card.
To make your application easier, external daughter boards, PCLD-782, PCLD-
785 and PCLD-786, are designed to work with the digital input/output ports of
the PCL-720. The PCLD-782 is a 16-channel opto-isolated digital input board
which provides an easy way to input digital data to the PCL-720 when the
ground isolation is required The PCLD-785 is a 16-channel relay output board
which can be driven by the digital output of the PCL-720 card. The PCLD-786
is an SSR board which can control AC power up to8 channels.
An on-board Intel 8253 programmable interval timer provides three independent
16 bit down counters as timing sources for various applications. Also, a
breadboard area is available for customized interface circuits.
The PCL-720 (after rev. C) also offers on-board clock sources those are 1 MHz,
100 KHz and 10 KHz and these frequencies can be double, half or quartered by
setting jumpers.
1.2 Features, Application and Specifications
Features :
Ÿ32 digital input channels
Ÿ32 digital output channels
ŸHigh output driving capacity
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General Information PCL-720
ŸLowinput loading
Ÿ3-channelprogrammable intervaltimer
ŸOn-board crystalbased clocksource
ŸBreadboard area forcustomized circuits
Applications
ŸIndustrialON/OFF control
ŸContact closure monitoring
ŸSwitch panel status sense
ŸBCD interface
ŸDigital I/O control
ŸIndustrial automation
ŸLaboratory automation
ŸPeriod and pulse width measurement
ŸEvent and frequency counting
Specifications
ŸDimensions: 9" x 4.125"
22.8 cm x 10.48 cm
ŸBus : IBM PC bus
ŸSlot : One 62-pin slot
ŸI/O Port Address : Hex 200 - hex 3F8
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PCL-720 General Information
ŸBreadboard Area: 540 (30 X 18) plated-through "donuts"
holes, each with a.036' hole on 0.10"
centers.
ŸDigital Input
Input Low Level : Min. -0.5V, max. 0.8V
Input High Level: Min. 2.0V, max. 5.0V
Input Loading : Max 0.2 mA at 0.4V
Input Hysteresis : Typical 0.4V, min. 0.2V
ŸDigital Output
Output Low Level : Max. 0.5V at 24 mA
(sink) Max. 0.4V at 12 mA
Output High Level : Min. 2.0V at 15 mA
(source) Min. 2.4V at 3 mA
Driving Capacity : 15 TTL's at least
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CHAPTER 2 INSTALLATION
2.1. Initial Inspection
Inside the shipping container, you should find this operating manual and the
PCL-720 card.
The PCL-720 is carefully inspected both mechanically and electrically before
shipment. It should be free of marks and scratches and in perfect electrical
order on receipt.
Remove the PCL720 interface card from its protective packaging by grasping
the metal rear panel. Keep the anti-vibration package since it may be used to
return the card if it needs repair. The package may also be used if the card is
stored outside of the computer.
The board should be handled only by the edges. The integrated circuits on
the board can be damaged by static electric discharge. The package
2.2. Base Address Selection
Most of the peripheral devices and the interface adapters in the PC are
controlled and sensed using the digital input and output pens. These ports are
addressed using the I/O port address space of the 8088 or 80286
microcomputer.
The I/O port base address for the PCL-720 is selectable by the setting of a DIP
switch (SW1). Valid addresses are from hex 200 to hex 3F8. Refer to Figure
2.1 for the location of the DIP switch (SW1).
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Installation PCL-720
Figure 2.1 The PCL-720 Card
The required switch settings for various base addresses are illustrated
as below :
Note : - ON=0, OFF=1
- "X" means "don't care"
- 1..8 are switch positions
- A3..A8 correspond to address Lines of the PC bus. A9 is
hard-wired to be 1.
- * means factory setting
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PCL-720 Installation
---------------------------------------------
I/o port Switch position
address 1 2 3 4 5 6
(Hex) A8 A7 A6 A5 A4 A3
---------------------------------------------
200-207 0 0 0 0 0 0
208-20F 0 0 0 0 0 1
.
.
* 2A0-2A7 0 1 0 1 0 0
2A8-2AF 0 1 0 1 0 1
.
.
2E8-2EF 0 1 1 1 0 1
.
2F8-2FF 0 1 1 1 1 1
3E8-3EF 1 1 1 1 0 1
3F8-3FF 1 1 1 1 1 1
---------------------------------------------
2.3. Clock Frequency Setting
The PCL-720 offers on-board clock sources those are 1 MHz, 100 KHz and 10
KHz when a jumper is placed on the position marked "xl" of JP1. These
frequencies can be double, half or quartered by placing a jumper on position
"x2", "x1/2" or "xl/4" of the JP1. For example, a frequency source of 25 KHz
can be got from the pad marked "100K" when placing the jumper on position
"x1/4" of the JP1 as below.
oo x2
* oo xl * : Factory setting
oo x1/2
oo x1/4
JP1
2.4. Installing into the PC
POWERMUSTALWAYSBESWITCHEDOFFwhenremovingorinsertingthe
PCL-720 card and connecting or disconnecting cables.
Use a screw driver to remove the cover mounting screws from the rear of the
system unit.
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