Contec CNT24-4 User Manual

CNT24-4(PCI)

24Bit Up/Down Counter Board for PCI

User’s Guide

Copyright

Copyright 1997 CONTEC Co., LTD. ALL RIGHTS RESERVED
No part of this document may be copied or reproduced in any form

by any means without prior written consent of CONTEC Co., LTD.

CONTEC Co., LTD. makes no commitment to update or keep
current the information contained in this document. The
information in this document is subject to change without notice.

All relevant issues have been considered in the preparation of this
document. Should you notice an omission or any questionable
item in this document, please feel free to notify CONTEC Co.,
LTD.

Regardless of the foregoing statement, CONTEC assumes no
responsibility for any errors that may appear in this document nor
for results obtained by the user as a result of using this product.

Trademarks

MS, Microsoft, MS-DOS and Windows are trademarks of Microsoft
Corporation. Other brand and product names are trademarks of
their respective holder.

CNT24-4(PCI)

i

Product Configuration

- CNT24-4(PCI) Board…1

- CNT24-4(PCI) Setup Disk (3.5inch/1.44MB)…1

- User's Guide (this Booklet)…1

Unpacking:

This card is specially packed in an anti-static bag to prevent damage
in shipping.

Check the contents to make sure that you have everything listed
above. If you do not have all the items, contact your distributor
or CONTEC group office where you purchased.

Note!

Do not remove the board from its protective packaging until the
computer case is open and ready for installation. Electrical static
can cause damage to electrical components.

ii

CNT24-4(PCI)

Table of Contents

Copyright........................................................................... i

Trademarks........................................................................ i

Product Configuration......................................................ii

1. Introduction............................................................. 1

Features.........................................................................1

Limited Three-Year Warranty......................................2

How to Obtain Service..................................................2

Liability .........................................................................2

About the Manual .........................................................3

2. Setup....................................................................... 5

Component Locations....................................................... 5

Setting the Board ID........................................................ 6

Setting procedure..........................................................6

Setting the Interrupt Use................................................ 7

Setting up the Board

(For Use under MS-DOS or Windows 3.1)...................... 8

Procedure.......................................................................8

Checking resources.......................................................8

Obtaining resource information...................................9

Sample programs for MS-DOS.....................................9

Sample's Specification ................................................10

Setting up the Board (for Use under Windows 95)....... 14

Checking the OS version ............................................14

Procedure for use under Windows 95

version 4.00.950 or 4.00.950a.....................................15

Procedure for use under Windows 95

version 4.00.950B........................................................15

Method of installing two or more CNT24-4(PCI)

boards (for use under Windows 95 version 4.00.950

or 4.00.950a)................................................................16

Method of installing two or more CNT24-4(PCI)

boards

(for use under Windows 95 version 4.00.950B) .........18

Checking resources.....................................................19

CNT24-4(PCI)

iii

Support software.........................................................20

Setting up the Board (for Use under Windows NT) ..... 21

Procedure.....................................................................21

Checking resources.....................................................22

Support software.........................................................22

3. External Connection ................................................ 23

Connecting the Interface Connector..........................23

Connector........................................................................ 24

Optional Cable DT/B2.................................................26

External Connection ...................................................... 27

Output Circuit and Connecting Example..................29

Connecting Rotary Encoder........................................... 30

Measures Against Voltages............................................ 31

4. I/O Ports and Registers............................................ 33

I/O Port Bit Assignment................................................. 33

Data Setting ................................................................33

Count Value Flow........................................................34

Operation Command...................................................35

Output Command........................................................... 37

Count initial value

(Commands; CH0:00h, CH1:05h, CH2:0Ah, CH3:0Fh)

......................................................................................37

Operation Mode

(Command CH0:01h, CH1:06h, CH2:0Bh, CH3:10h)

......................................................................................37

Counter Operation Mode ............................................... 40

2-phase input...............................................................40

Single-phase input......................................................40

Single-phase input with gate control.........................41

Synchronization clear.................................................42

Asynchronization clear...............................................42

Count input multiplication.........................................43

Z-phase/CLR input

(Command CH0:02h, CH1:07h, CH2:0Ch, CH3:11h)

......................................................................................44

iv

CNT24-4(PCI)

Comparison register

(Command CH0:03h, CH1:08h, CH2:0Dh, CH3:12h)

......................................................................................45

Digital filter

(Command CH0:04h, CH1:09h, CH2:0Eh, CH3:13h)

......................................................................................46

Latch Count value (Command 14h)...........................48

Interrupt mask (Command 15h)................................48

Sense Reset (Command 16h)......................................49

Programmable time

(Command timer data:17h, Timer start:18h)............50

Timer interrupt frequency..........................................51

One-shot pulse (Command 19h).................................52

Input Command ............................................................. 53

Read count value

(Command CH0:00h, CH1:05h, CH2:0Ah, CH3:0Fh)

......................................................................................53

Status data

(Command CH0:01h, CH1:06h, CH2:0Bh, CH3:10h)

......................................................................................54

Interrupt mask (Command 15h)................................56

Sense port (Command 16h) ........................................56

Default Setting............................................................57

5. System Reference .................................................... 59

Specifications.................................................................. 59

Block Diagram................................................................ 60

6. Troubleshooting....................................................... 61

QUESTIONS: ................................................................. 61

Is the pilot light on?....................................................61

Did the system boot up?..............................................61

Does your program work?...........................................61

Does the sample program work?................................61

Is the input data accurate? .........................................62

Still have a problem? ..................................................62

7. Index......................................................................65

CNT24-4(PCI)

v

List of Figures

Figure 2.1. Component Locations ...............................................5

Figure 2.2. Board ID Settings (SW1) ..........................................6

Figure 2.3. Setting the Interrupt Use ...........................................7

Figure 2.4. Sample Programs on FD............................................ 9

Figure 2.5. CRT Display (CNTPCI01.C)...................................11

Figure 2.6. Flowchart (CNTPCI01.C) .......................................11

Figure 2.7. CRT Display (CNTPCI02.C)...................................12

Figure 2.8. CRT Display (CNTPCI03.C)...................................12

Figure 2.9. Flowcharts (CNTPCI03.C)...................................... 13

Figure 3.1. Connecting the Interface Connector........................23

Figure 3.2. CN1 Connector as Viewed from Back of Computer

................................................................................ 24

Figure 3.3. CN1 Pin Assignments.............................................24

Figure 3.4. CN2 Frontal View...................................................25

Figure 3.5. CN2 Pin Assignments.............................................25

Figure 3.6. Optional Cable DT/B2 ............................................26

Figure 3.7. 37-Pin D-Type Connector Pin Assignments............26

Figure 3.8. Digital Input............................................................ 27

Figure 3.9. Connecting to Open-collector Output Device..........27

Figure 3.10. TTL-Level Input Circuitry...................................... 28

Figure 3.11. Output Circuit and Connecting Example .................29

Figure 3.12. Photocoupler Input..................................................30

Figure 3.13. TTL Input ...............................................................30

Figure 3.14. Samples of Surge Voltage Protection.......................31

Figure 4.1. Output port ..............................................................33

vi

CNT24-4(PCI)

Figure 4.2. Input port................................................................ 33

Figure 4.3. Count Value Flow....................................................34

Figure 4.4. Counting Example with 2-phase Input .................... 40

Figure 4.5. Single-phase Counting Example..............................40

Figure 4.6. Example of Single-phase Input with Gate Control... 41

Figure 4.7. Example of Synchronization Clear..........................42

Figure 4.8. Example of Asynchronization Clear ........................42

Figure 4.9. Counting Example for Multiplied Count Inputs.......43

Figure 4.10. Number of Z-phase Inputs Available ZSE=0

(Positive Logic).......................................................44

Figure 4.11. Digital Filter ............................................................47

Figure 5.1. Block Diagram........................................................60

CNT24-4(PCI)

vii

List of Tables

Table 2.1. Sample's Specification ...............................................10

Table 4.1. Output Command ...................................................... 35

Table 4.2. Input Command.........................................................36

Table 4.3. Counter Operation Mode ...........................................38

Table 4.4. Switching Counting Direction.................................... 39

Table 4.5. Z-phase Input Mode...................................................44

Table 4.6. Digital Filter Clock Data............................................ 47

Table 4.7. Relationship between programmable timer interrupt

................................................................................ 51

Table 4.8. Relationship Between One-shot Pulse Width Data

and Pulse Width......................................................52

Table 4.9. Default Setting...........................................................57

Table 5.1. Specifications ............................................................59

viii

CNT24-4(PCI)

1. Introduction

Thank you for purchasing the CNT24-4(PCI).
The CNT24-4(PCI) is the PCI bus compatible. This board is
plugged into a PCI bus expansion slot on the motherboard in the
personal computer or into a PCI bus unit. You should read this
manual carefully to construct your system with the board by
creating its application programs and connecting the required
external devices to the board.

Features

- One board enables 24 bit up/down counts for four channels.

- Counts two phase signals from devices like a rotary encoder or a
linear gauge.

- Photocoupler insulated input or TTL level input for each channel.

- Generates interrupts or outputs signals by matching the count
value of each channel with the value set by the user.

- Periodically generates an interrupt using an internal
programmable timer.

- Each channel has a general input signal (including photocoupler
and TTL input).

Introduction

CNT24-4(PCI)

1

Introduction

Limited Three-Year Warranty

CONTEC Interface boards are warranted by CONTEC Co., LTD. to
be free from defects in material and workmanship for up to three
years from the date of purchase by the original purchaser.

Repair will be free of charge only when this device is returned
freight prepaid with a copy of the original invoice and a Return
Merchandise Authorization to the distributor or the CONTEC group
office, from which it was purchased.

This warranty is not applicable for scratches or normal wear, but
only for the electronic circuitry and original boards. The warranty
is not applicable if the device has been tampered with or damaged
through abuse, mistreatment, neglect, or unreasonable use, or if the
original invoice is not included, in which case repairs will be
considered beyond the warranty policy.

How to Obtain Service

For replacement or repair, return the device freight prepaid, with a
copy of the original invoice. Please obtain a Return Merchandise
Authorization Number (RMA) from the CONTEC group office
where you purchased before returning any product.

2

* No product will be accepted by CONTEC group without the

RMA number.

Liability

The obligation of the warrantor is solely to repair or replace the
product. In no event will the warrantor be liable for any incidental
or consequential damages due to such defect or consequences that
arise from inexperienced usage, misuse, or malfunction of this
device.

CNT24-4(PCI)

About the Manual

This manual consists of the following chapters:
Chapter 1 Introduction
Chapter 2 Setup

This chapter describes the procedures for setting up
the CNT24-4(PCI) board and setting its switches.

Chapter 3 Connecting the External Devices

This chapter explains how to connect external devices
to the board and gives notes on connecting them.

Chapter 4 I/O Ports and Registers

This chapter provides the assignment and definitions
of each I/O port bit used the board.

Chapter 5 Specifications

This chapter summarizes the hardware specifications
of the board and provides circuit block diagrams.

Chapter 6 Index

Introduction

CNT24-4(PCI)

3

Introduction

4

CNT24-4(PCI)

2. Setup

Component Locations

Figure 2.1. shows the names of major parts on the CNT24-4(PCI)
board.
Note that the switch setting shown below is the factory default.

• Interface connector
for TTL level input (CN2)

• Jumper for interrupt signal
resource settings

JP1
INT

USE

1 2 3

NOT USE

Setup

CNT24-4(PCI)

• Interface connector for
photocoupler resistance input
(CN1)

• BOARD ID Setting Switch

Figure 2.1. Component Locations

8

9

7

A

B

6

5

C

4

D

3

E

2

F

1

0

SW1

BOARD ID

JP1

BOARD ID

SW1

CNT24-4(PCI)

5

Setup

Setting the Board ID

If you install two or more CNT24-4(PCI) boards on one personal
computer, set their respective board IDs to distinguish them.
Assign a different value to each of the boards.

The board IDs from 0 to F can be set to identify up to sixteen
boards.

If only one board is used, the original factory setting (Board ID = 0)
should be used.

Setting procedure

To set the board ID, use the rotary switch on the board. Turn the
SW1 knob to set the board ID as shown below.

8

9

7

A

6

B

5

C

4

D

3

E

2

F

1

0

SW1

BOARD ID

( Same for match output :

BOARD ID = 0 )

Figure 2.2. Board ID Settings (SW1)

6

CNT24-4(PCI)

Setting the Interrupt Use

If you don't use the Interrupt function, to save the Interrupt
resources of PC, you can let recognize to the PC the CNT24-4(PCI)
as no-Interrupt function boards.

In case of interrupt use, this board is assigned the interrupt level
from PC.

Setup

Setup when interrupt is used

JP1
INT

USE

(Factory setting)

NOT USE

Setup when interrupt is not used

JP1
INT

USE

NOT USE

1 2 31 2 3

Figure 2.3. Setting the Interrupt Use

CNT24-4(PCI)

7

Setup

Setting up the Board

(For Use under MS-DOS or Windows 3.1)

The board setup method for the CNT24-4(PCI) is different
depending on each OS. Set up the board using the appropriate
method depending on the OS used. This section describes the
procedure and notes for using the board under MS-DOS or
Windows 3.1.

Procedure

(1) Set the board ID.
(2) Be sure to check that the personal computer is off, then plug

the board into a PCI bus slot in the personal computer.
(3) Turn the personal computer on to start up MS-DOS.
(4) Setting up the board is completed when MS-DOS gets and

running. When setting up the board has been completed,

be sure to check the assigned resources.

Checking resources

Before operating the CNT24-4(PCI) board, be sure to check the
personal computer resources (I/O addresses and interrupt level)
assigned to the board. For PCI compatible (Plug and Play
compliant) boards, free resources among the personal computer
resources are assigned automatically upon activation of the personal
computer. Follow the steps below to check the assigned resources.

(1) Run the resource check program "CNTPCI.EXE" stored in the

DOS directory on the supplied floppy disk (FD).
(2) Check the I/O addresses and interrupt level (IRQ) displayed on

the screen.
Once the CNT24-4(PCI) has been set up correctly, it can be used

under MS-DOS and Windows 3.1.

8

CNT24-4(PCI)

Obtaining resource information

You can get information on the personal computer resources
assigned to the CNT24-4(PCI) by accessing the PCI BIOS.
For the precise method, refer to the sample program stored in the
DOS directory on the supplied FD.

Sample programs for MS-DOS

The sample programs for using the CNT24-4(PCI) under MS-DOS
are written in Microsoft C.

Setup

DOS --- Samples --

DOS --- Samples --- 98 or PC ---

(1) CNTPCI.C Resource check program

CNTPCI.EXE

(2) CNTPCI01.C Count value of any Channel

CNTPCI01.EXE

(3) CNTPCI02.C 4 channel count value at the same time

CNTPCI02.EXE

(4) CNTPCI03.C Count value for every time period by timer interrupt

CNTPCI03.EXE

Figure 2.4. Sample Programs on FD

For details on I/O addresses, see Chapter 4 "I/O Ports and
Registers."

CNT24-4(PCI)

9

Setup

Sample's Specification

Table 2.1. Sample's Specification

Using channel 0ch 0ch - 3ch 0ch - 3ch
Operating mode *1 *1 *1
Input Z-phase/clear once in valid in valid
Digital filter 6.5µsec 100nsec *2 100nsec *2
Initial count value 0 0 0
Comparison count value 100 (64h) 100 (64h) 100 (64h)
One-shot pulse width
Timer value --- --- 1 second
Using connector CN1 CN1 CN1

*1 Set an operation mode Set an operation mode for input spcification.
Operation mode data example
8Ch : Photocoupler insulation, 2-phase input
9Bh : Photocoupler insulation, Single-phase input
8Bh : Photocoupler insulation, Gate control input
CCh : TTL level, 2-phase input
DBh : TTL level, Single-phase input
CBh : TTL level, Gate Control input
Other settings (Common) : Asynchronization clear, UP counting direction,
Z-phase positive logic, Single input multiplication.
The Sample program uses the 8C setting.
*2 In the CNTPCI02, CNTPCI03, the digital filter is not set and the default is 100nsec.
*3 To Output the signal to an external peripheral, CN1 must be connected.

Item Specification

CNTPCI01.C CNTPCI02.C CNTPCI03.C

104.4msec *3 --- ---

≠

10

Note!

Connect a signal appropriate for the input specification of an
external peripheral. To connect a rotary encoder, see Chapter 3.
"Connecting Rotary Encoder".

CNT24-4(PCI)

Setup

(1) Display count value of any channel (CNTPCI01.C)
This program displays the count value of the specified channel.

If the program is executed, the count value of the signal connected
to channel 0 is displayed.

The count comparison data is set at 100; matching with the count
value outputs the one-shot pulse to an external peripheral.

Pressing the ESC key terminates the program

CHANNEL DATA STATUS

CH0 0 7F

Figure 2.5. CRT Display (CNTPCI01.C)

START

Set I/O address

*********

Set channel

Initial setting

• Set operation mode

• Set Z-phase

• Set digital filter

• Reset sense bit

Set count data

(Lower)

(Middle)

(Upper)

Set count match data

(Lower)

(Middle)

(Upper)

1

1

Set one-shot

pulse width

Latch count value

Read count value

(Lower)
(Middle)
(Upper)

Calculate count value

Display
count value

Figure 2.6. Flowchart (CNTPCI01.C)

CNT24-4(PCI)

11

Setup

(2) Display 4 channel count values at the same time

(CNTPCI02.C)
This program displays the 4 channel count values at the same time.

When this program is executed, the signal count values (Decimal
and HEX) that are connected to channels 0 - 3 and their input status.

Pressing the ESC key terminates the program.

CHANNEL DATA STATUS

CH0 0 7F
CH1 0 7F000000
CH2 0 7F000000
CH3 0 7F000000

DATA(HEX)

000000

Figure 2.7. CRT Display (CNTPCI02.C)

(3) Display count value for every time period by timer interrupt

(CNTPCI03.C)
This program generates an interrupt every second using the timer

and displays the count value. If this program is executed, the
count values (HEX and decimal) of the signal that is connected to
channels 0 -3 are displayed. The interrupt level is IRQ5.

Pressing the ESC key terminates the program.

CHANNEL DATA

CH0 0
CH1 0000000
CH2 0000000
CH3 0000000

INTERRUPT COUNT 0TIME

DATA(HEX)

000000

12

Figure 2.8. CRT Display (CNTPCI03.C)

Note!

To terminate the program, press the ESC key. If the program is
terminated by another key, the interrupt routine is aborted and the
process stops.

CNT24-4(PCI)

Setup

START

Set segment

*********

base address

Set address

Initial setting

• Set operation mode

• Set Z-phase

• Reset sense bit

Set count data
(Lower)
(Middle)
(Upper)

Set count data
(Lower)
(Middle)
(Upper)

Interrupt process

Set IRQ5

1

1

Clear mask

Set timer data
(Lowest)
(Lower)
(Upper)
(Highest)

Start timer

Check sense port

Latch count value

Read count value

Calculate count value

Display
count value

Reset sense bit

N

END

Y

Set IMR

Stop timer

END

IRQ5

Save registar

*********

Input number of
timer count ups

Interrupt EQI process

Restore register

IRET

Figure 2.9. Flowcharts (CNTPCI03.C)

CNT24-4(PCI)

13

Setup

Setting up the Board

(for Use under Windows 95)

The board setup method for the CNT24-4(PCI) is different
depending on each OS. Set up the board using the appropriate
method depending on the OS used. This section describes the
procedure and notes for using the board under Windows 95.

Before the CNT24-4(PCI) can be used under Windows 95, have the
OS recognize the I/O addresses and interrupt level (IRQ) to be used
for the CNT24-4(PCI). Assigning the resources such as I/O
addresses and IRQ for a piece of hardware in Windows 95 is called
"installing the hardware." Use the appropriate procedure to install
the CNT24-4(PCI).

Checking the OS version

Note that the procedure for installing the CNT24-4(PCI) is different
depending on each version of Windows 95.

Check the version of Windows 95 on your system as follows before
installing the CNT24-4(PCI).

14

(1) Open [Control Panel] from [My Computer].
(2) Double-click on the [System] option to open the [System

Properties] property sheet.
(3) Check the "System:" number displayed on the [General] page.

System:

Microsoft Windows 95

4.00.950

The version numbers of Windows 95 include 4.00.950, 4.00,950a,
and 4.00.950B. The CNT24-4(PCI) setup method is different
depending on the version number of Windows 95.

CNT24-4(PCI)

Procedure for use under Windows 95 version 4.00.950 or

4.00.950a

(1) Set the board ID.
(2) Be sure to check that the personal computer is off, then plug

the board into a PCI bus slot in the personal computer.
(3) Turn the personal computer on to start up Windows 95.
(4) Windows 95 will come up with the [New Hardware] detection

dialog box. Select [Multimedia Device: Select which driver

you want to install for your new hardware.] and then [Driver

from disk provided by hardware manufacturer].
(5) In the [Install From Disk] dialog box, insert the supplied FD in

a drive, enter the drive name and directory name in the [Copy

Distributed File From] field, then click on [OK].
(6) Follow the instructions on the screen to complete installation

of the CNT24-4(PCI). After finishing installing the board, be

sure to check the assigned resources.

Procedure for use under Windows 95 version 4.00.950B

Setup

(1) Set the board ID.
(2) Be sure to check that the personal computer is off, then plug

the board into a PCI bus slot in the personal computer.
(3) Turn the personal computer on to start up Windows 95.
(4) Windows 95 will come up with the [New Hardware] detection

dialog box. In the [Device Driver Wizard] that appears next,

check that "CONTEC Co., Ltd. - Multimedia Device" has been

listed, then select [Next>].
(5) In the next dialog box, select [Specify Location...].

Insert the supplied FD in a drive, enter the drive name and

directory name (WIN95) in the [Location] field, then click on

[OK].
(6) In the next dialog box, check the "Updated driver found for

this device" message, then select [End]. This completes

installation of the CNT24-4(PCI). After finishing installing

the board, be sure to check the assigned resources.

CNT24-4(PCI)

15

Setup

Method of installing two or more CNT24-4(PCI) boards

(for use under Windows 95 version 4.00.950 or

4.00.950a)

Follow the procedure below to install two CNT24-4(PCI) boards for
use under Windows 95 version 4.00.950 or 4.00.950a.

(1) Check the board ID of the fi rst CNT24-4(PCI) board, plug it

into a PCI bus slot, then start up Windows 95 to install the first

board correctly.
(2) Check that the first CNT24-4(PCI) board has been set up

correctly, as described in "Checking resources." Be sure to

complete installation of the first board before trying to install

the second one.
(3) Exit Windows 95 and turn the personal computer off.
(4) Check the board ID of the second CNT24-4(PCI) board, then

plug it into a PCI bus slot. To the second board, assign a

board ID different from that assigned to the first board.
(5) Turn the personal computer on again to start up Windows 95.
(6) Windows 95 will come up with the [New Hardware] detection

dialog box. In [Multimedia Device: Select which driver you

want to install for your new hardware.], select [Select from

List].

16

(7) The [Select Hardware Type] dialog box will then appear.

In [Select Hardware Type to Install], select [Other Devices].
(8) In the [Select Device] dialog box that appears, select

[CONTEC] from [Manufacturers] and select [CONTEC Co.,

Ltd. - CNT24-4(PCI)] from [Models].
(9) The [Change System Settings] dialog box appears. Follow

the messages to restart the computer.
(10) When Windows 95 is restarted, installation of the second

CNT24-4(PCI) board is completed. Check the assigned

resources again.

CNT24-4(PCI)

Notes!

Setup

For installing the third board and later, follow the same steps as
those for installing the second one. Before you can install the
third board or later, all of the already installed CNT24-4(PCI)
boards must be in the PCI bus slots.

- The second CNT24-4(PCI) board cannot be installed normally

unless the resources (I/O addresses and interrupt level) to be
used for the board cannot be allocated. Before trying to install
the second board, check free resources on the personal computer.

- The resources used for each CNT24-4(PCI) board do not depend

on the location of the PCI bus slot or the board itself. If you
remove two or more CNT24-4(PCI) boards which have already
been installed and then re-mount one of them on the computer,
therefore, it is unknown which one of the sets of resources
previously assigned to the two boards is assigned to the re­mounted board. In this case, check the resource settings again.

CNT24-4(PCI)

17

Setup

Method of installing two or more CNT24-4(PCI) boards
(for use under Windows 95 version 4.00.950B)

Follow the procedure below to install two CNT24-4(PCI) boards for
use under Windows 95 version 4.00.950B.

(1) Check the board ID of the first CNT24-4(PCI) board, plug it

into a PCI bus slot, then start up Windows 95 to install the first

board correctly.
(2) Check that the first CNT24-4(PCI) board has been set up

correctly, as described in "Checking resources." Be sure to

complete installation of the first board before trying to install

the second one.
(3) Exit Windows 95 and turn the personal computer off.
(4) Check the board ID of the second CNT24-4(PCI) board, then

plug it into a PCI bus slot. To the second board, assign a

board ID different from that assigned to the first board.
(5) Turn the personal computer on again to start up Windows 95.
(6) The OS will then automatically install the second board.

When the installation has been completed, check the assigned

resources again.

18

For installing the third board and later, follow the same steps as
those for installing the second one. Before you can install the
third board or later, all of the already installed CNT24-4(PCI)
boards must be in the PCI bus slots.

CNT24-4(PCI)

Notes!

- The second CNT24-4(PCI) board cannot be installed normally

unless the resources (I/O addresses and interrupt level) to be
used for the board cannot be allocated. Before trying to install
the second board, check free resources on the personal computer.

- The resources used for each CNT24-4(PCI) board do not depend

on the location of the PCI bus slot or the board itself. If you
remove two or more CNT24-4(PCI) boards which have already
been installed and then re-mount one of them on the computer,
therefore, it is unknown which one of the sets of resources
previously assigned to the two boards is assigned to the re­mounted board. In this case, check the resource settings again.

Checking resources

Before operating the CNT24-4(PCI) board, be sure to check the PC
resources (I/O addresses and interrupt level) assigned to the board.
For PCI compatible (Plug and Play compliant) boards, free
resources among the PC resources are assigned automatically upon
activation of the personal computer. Follow the steps below to
check the assigned resources managed by the OS.

(1) Double-click on the [System] option in [Control Panel] to open

the [System Properties] property sheet. Select the [Device

Manager] tab.

Setup

(2) Click on the [Multi function adapter] folder.
(3) Click on the [CONTEC Co., Ltd. - CNT24-4(PCI)] folder to

display its properties.
(4) Select the [Resources] tab to check the device type, resource

settings, and the conflicting device list.
(5) If you want to change a resource setting, uncheck the [Use

automatic settings] option in advance. To change the I/O

address range (Input/Output Range), change the configuration

name in the [Setting based on:] field. Since the interrupt

level (Interrupt Request) cannot be changed, use the assigned

IRQ.
Once the CNT24-4(PCI) has been installed correctly, it can be used

under Windows 95.

CNT24-4(PCI)

19

Setup

Support software

CONTEC provides the following driver software for Windows 95:

API-CNT(98/PC)W95 Ver. 2.3 or later

These pieces of driver software support up to four CNT24-4(PCI)
boards.

Note that, when API-CNT(98/PC)W95 is used, development
languages that can be used are only 32-bit versions. Neither driver
can be supported by any language dedicated to 16-bit applications.

20

CNT24-4(PCI)

Setting up the Board

(for Use under Windows NT)

The board setup method for the CNT24-4(PCI) is different
depending on each OS. Set up the board using the appropriate
method depending on the OS used. This section describes the
procedure and notes for using the board under Windows NT.

Before the CNT24-4(PCI) can be used under Windows NT, have the
OS recognize the I/O addresses and interrupt level (IRQ) to be used
for the CNT24-4(PCI). Assigning the resources such as I/O
addresses and IRQ for a piece of hardware in Windows NT is called
"installing the hardware."

Installing the CNT24-4(PCI) board requires separately priced
CONTEC driver software "API-CNT(98/PC)NT." Follow the
procedure below to install the board.

Procedure

(1) Set the board ID.
(2) Be sure to check that the personal computer is off, then plug

the board into a PCI bus slot in the personal computer.

Setup

(3) Turn the personal computer on to start up Windows NT .
(4) When Windows NT has been started, run SETUP.EXE for

API-CNT(98/PC)NT. For details on SETUP.EXE, refer to the

API-CNT(98/PC)NT manual.
(5) When SETUP.EXE has been terminated, run CONFIG.EXE

for API-CNT(98/PC)NT. For details on CONFIG.EXE, refer

to the API-CNT(98/PC)NT manual.
You have now finished installing the CNT24-4(PCI) board. When

setting up the board has been completed, be sure to check the
assigned resources.

CNT24-4(PCI)

21

Setup

Checking resources

Before operating the CNT24-4(PCI) board, be sure to check the
personal computer resources (I/O addresses and interrupt level)
assigned to the board. For PCI compatible (Plug and Play
compliant) boards, free resources among the personal computer
resources are assigned automatically upon activation of the personal
computer. Follow the steps below to check the assigned resources
managed by the OS.

(1) Open [Windows NT Diagnostic Program] from [Management

(2) Select [Resources] (IRQ/port settings). Check the type and

Once the CNT24-4(PCI) has been installed correctly, it can be used
under Windows NT.

Support software

CONTEC provides the following driver software for Windows NT:

Tools].

settings of resources assigned to the API-CNT(98/PC)NT and

the conflicting device list.

22

API-CNT(98/PC)NT Ver. 2.3 or later

This driver software supports up to four CNT24-4(PCI) boards.

CNT24-4(PCI)

3. External Connection

Connecting the Interface Connector

To input external pulse signals, use the interface connector on the
board. Use CN1 for the photocoupler insulated input. For TTL
level input, connect CN2 to an external device by connecting the
optional cable to CN2.

Matched pulse output is output from CN1. (Photocoupler insulated
open collector output)

External Connection

Note!

Figure 3.1. Connecting the Interface Connector

See Chapter 3 "Option cable DT/B2" for further information.

CNT24-4(PCI)

23

External Connection

Connector

Connecting the CNT24-4(PCI) board to external devices is via one
37-pin female D-Type connector (CN1) and one 30-pin male
connector (CN2).

37
36

21
20

Figure 3.2. CN1 Connector as Viewed from Back of

Count-equal
Plus Output

19
18

17
3

2
1

Computer

Plus Common
General-purpose Input
OUT Z/CLR

CH3

OUT B/DOWN
OUT A/UP
Not Connected
General-purpose Input
OUT Z/CLR

CH2

OUT B/DOWN
OUT A/UP
Plus Common 2
Not Connected
Minus Common
CH3 Output
CH2 Output
CH1 Output
CH0 Output
Plus Common

• Installed connector
37-pin D-Type connector (female)

• Suitable cable
17JE-23370-02(D8C) (male)
(DDK)
FDCD-37P (male)
(HIROSE)
DC-37P-N (male)
(Japan Aviation Electronics)

19

37

P3P
P3U
P3Z
P3B
P3A
N.C.
P2U
P2Z
P2B
P2A
P2P
N.C.
OUTN
OUT3
OUT2
OUT1
OUT0
OUTP

18

36

17

35

16

34

15

33

14

32

13

31

12

30

11

29

10

28

9

27

8

26

7

25

6

24

5

23

4

22

3

21

2

20

1

N.C.

Not Connected

P1P

Plus Common 1

P1U

General-purpose Input

P1Z

OUT Z/CLR

P1B

OUT B/DOWN

P1A

OUT A/UP

N.C.

Not Connected

P0U

General-purpose Input

P0Z

OUT Z/CLR

P0B

OUT B/DOWN

P0A

OUT A/UP

P0P

Plus Common 0
N.C.
N.C.
N.C.

Not Connected

N.C.
N.C.
N.C.
N.C.

CH1

CH0

24

Note!

Each channel has an independent Plus Common.

Figure 3.3. CN1 Pin Assignments

CNT24-4(PCI)

External Connection

Note!

A15

B15 B14

A13

A14

B13

• Installed connector
PS-30PE-D4T1PN1(JAE)

• Suitable cable

PS-30SEN-D4P1-1C(JAE)

(Japan Aviation Electronics)

A3

B3

A2 A1

B1B2

Figure 3.4. CN2 Frontal View

Not Connected
General-purpose Input
OUT Z/CLR

CH1

OUT B/DOWN
OUT A/UP
Ground
General-purpose Input
OUT Z/CLR

CH0

OUT B/DOWN
Not Connected
General-purpose Input
OUT Z/CLR

CH3

OUT B/DOWN
OUT A/UP

CH2

+5V

N.C.
T1U
T1Z
T1B
T1A
GND
T0U
T0Z
T0B
N.C.
T3U
T3Z
T3B
T2A
Vcc

A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15

B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
B14
B15

T0A

OUT A/UP

N.C.

Not Connected

GND

Ground

GND

Ground

GND

Ground

GND

Ground

GND

Ground

GND

Ground

GND

Ground

T3A

OUT A/UP

GND

Ground

T2U

General-purpose Input

T2Z

OUT Z/CLR

T2B

OUT B/DOWN

Vcc

+5V

The VCC and GND signals are used for all four channels.

CH0

CH3

CH2

Figure 3.5. CN2 Pin Assignments

CNT24-4(PCI)

25

External Connection

Optional Cable DT/B2

Note!

1
2
3

17
18
19

30-pin header connector
(Connector to CN2)

37-pin D-Type connector
(Connector to external equipment)

Figure 3.6. Optional Cable DT/B2

Not connected
OUT A/UP
OUT B/DOWN

CH0

OUT Z/CLR
General-purpose Input
Ground
OUT A/UP
OUT B/DOWN

CH1

OUT Z/CLR
General-purpose Input
Not connected
Not connected

Ground

GND
GND
GND
GND
GND
GND
GND

GND

N.C.

T0A
T0B
T0Z

T0U
T1A

T1B

T1Z

T1U
N.C.
N.C.

1

20

2

21

3

22

4

23

5

24

6

25

7

26

8

27

9

28

10

29

11

30

12

31

13

32

14

33

15

34

16

35

17

36

18

37

19

+5V

Vcc

+5V

Vcc
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.

OUT A/UP

T2A

OUT B/DOWN

T2B

OUT Z/CLR

T2Z

General-purpose Input

T2U

Ground

GND

OUT A/UP

T3A

OUT B/DOWN

T3B

OUT Z/CLR

T3Z

General-purpose Input

T3U

Not connected

N.C.

Each channel has an independent Plus Common.

20
21

36
37

Not connected

CH2

CH3

26

Figure 3.7. 37-Pin D-Type Connector Pin Assignments

CNT24-4(PCI)

External Connection

You are now ready to connect the I/O cables to the board if you
have not already done so. Connecting the CNT24-4(PCI) to
external devices is via the 37-pin D-SUB I/O connector on the
board. Figure 3.8. shows Digital input circuits. Figure 3.9.
shows an example of connecting this board to open-collector output
device.

2.2k

Ω

Photocoupler

220

BOARD

Ω

Digital output

Plus common

+5V

External Connection

Input Terminal

External Signal Output

Figure 3.8. Digital Input

400Ω

R

Plus common
+12V

External Signal
Output

2.2k

Ω

Photocoupler

220Ω

Input Terminal

Figure 3.9. Connecting to Open-collector Output Device

CNT24-4(PCI)

27

External Connection

Notes!

- The general input signal uses the same circuit structure. (the
photocoupler uses TLP 521.)

- To use external power (other than 5V), insert a current limiting
resistor at the R position.

<Calculating R (current limiting resistor)>
Assume external power is PV, then

P - 5 P - 5

20

If P=12, use a 350 < R < 470 ohm resistor.

LS244

< Rk Ω <

Vcc

+5V

15

Diode

Diode

BOARD

Input Terminal

GND

Digital output

External Signal
Output

28

Figure 3.10. TTL-Level Input Circuitry

Notes!

- The general input signal uses the same circuit structure.

- The cable should be 1.5m or less.

- To prevent malfunction caused by noise, separate the circuit as
much as possible from other signal cables and noise sources.

CNT24-4(PCI)

External Connection

Output Circuit and Connecting Example

When the count value of each channel and the user set value match,
the circuit outputs a matched signal for one shot (1 pulse). The
signal output part uses the open collector method by photocoupler
insulation. As a result, an external power source is needed to run
the board output.

Note!

Vcc

1kΩ

1k

Photocoupler

Photocoupler

Ω

18k

Ω

Plus common

Load

Output pin

Minus common

Load

External Power
Supply
DC5V~12V

Figure 3.11. Output Circuit and Connecting Example

The board's output transistor does not have a surge voltage
protection circuit. As a result, to run inductive loads (for example,
relays and lamps), install surge voltage protection at the loading
side. See "Appendix C: Surge Voltage" for further information.

CNT24-4(PCI)

29

External Connection

Connecting Rotary Encoder

Note!

Encoder

Shield

Power
source

A-phase

B-phase

Z-phase

0V

(Connector pin number)
CH0 : 8 CH2 : 27
CH1 : 18 CH3 : 37

CH0 : 9 CH2 : 28

R

CH1 : 14 CH3 : 33
CH0 : 10 CH2 : 29

R

CH1 : 15 CH3 : 34
CH0 : 11 CH2 : 30

R

CH1 : 16 CH3 : 35

A-phase

B-phase

Z-phase

Plus Common

CN1

CNT24-4(PCI)

To use the photocoupler with 12V, 400Ω resistors are needed at R.
For 5V, no resistor is needed.

Figure 3.12. Photocoupler Input

Power
source

(Connector pin number)
CH0 : 9 CH2 : 28

CN2

Encoder

A-phase

B-phase

Z-phase

0V

CH1 : 14 CH3 : 33

CH0 : 10 CH2 : 29
CH1 : 15 CH3 : 34

CH0 : 11 CH2 : 30
CH1 : 16 CH3 : 35

1-7, 13, 32

A-phase

B-phase

Z-phase

GND

CN2

CNT24-4(PCI)

30

Note!

Shield

Option Cable

Convert the connector to a 37 pin connector using the optional
cable. The following shows the pin numbers of the 37 pin
connector.

Figure 3.13. TTL Input

CNT24-4(PCI)

Measures Against Voltages

When connecting a load which may generate a surge voltage or
current, for example an inductive load (relay coil) or incandescent
lamp, to one-shot output lines, suitable protection measures are
required to prevent damage to the output stage or a malfunction due
to noise. Instantaneously interrupting current flowing through a
coil including a relay causes the sudden generation of a high­voltage pulse. If its voltage exceeds the withstand voltage of the
transistor, the performance of the transistor may be degraded or it
may be damaged. To prevent this, be sure to connect a surge
absorption element when driving an inductive load including a relay
coil. Examples of measures against surge voltages are as shown in
the Figure 3.14. below.

External Connection

Note!

Figure 3.14. Samples of Surge Voltage Protection

The protection circuit will not be effective unless it is installed less
than 50cm from the load and contact.

CNT24-4(PCI)

31

External Connection

32

CNT24-4(PCI)

4. I/O Ports and Registers

I/O Port Bit Assignment

This board occupies consecutive I/O addresses for two ports.
Each I/O port has a register; the register is assigned by a command.
To set the register, execute an OUT command for the port (+0) to be
set, and enable the register. Then, execute an OUT command to
load data into the register for output, or to read the +1 port for input.
That is, for either input or output, first execute an OUT command to
enable the register, then output data to the register, or read the
register on the +1 port.

To set a register, execute an OUT command every time for the
output port (+0).

The following Figure 4.1. and Figure 4.2. show the I/O port bit
allocation.

D6 D5 D4 D3 D2 D1 D0

Base Address

D7

+0
+1
+2
+3

Command output (select register)

Setting data output

Not use
Not use

I/O Ports and Registers

Figure 4.1. Output port

D6 D5 D4 D3 D2 D1 D0

Base Address

D7

+0
+1
+2
+3

Impossible

Data / status read

Not use
Not use

Figure 4.2. Input port

Data Setting

To set 8 bit data, execute an OUT command for the +0 port and
output data to the +1 port. To set 24 bit data, execute an OUT
command for the 0 port and output data three times to the + port.
In this case, the data is set from the lower bite, the middle byte and
the upper byte. Data of 24 bits is read from the lower byte, the
middle byte and the upper byte.

Similarly, to set 32 bit data, output data four times to the +1 port.

CNT24-4(PCI)

33

I/O Ports and Registers

Count Value Flow

Set count
initial value

Command
CH0 : 00h
CH1 : 05h
CH2 : 0Ah
CH3 : 0Fh

Set comparison
register

Command
CH0 : 03h
CH1 : 08h
CH2 : 0Dh
CH3 : 12h

24bit
up / down
counter

24bit
comparator

Comparison
Register

Latch
count value
(Command 14h)

Count value
coincidence

Figure 4.3. Count Value Flow

Read
Regisster

Coincidence signal

Sense port
(Command 16h)

Interrupt mask
(Command 15h)

Status data

Command
CH0 : 01h
CH1 : 06h
CH2 : 0Bh
CH3 : 10h

Output one-shot pulse
(Command 19h)

Read
Counter value

Command
CH0 : 00h
CH1 : 05h
CH2 : 0Ah
CH3 : 0Fh

34

CNT24-4(PCI)

I/O Ports and Registers

Operation Command

Table 4.1. Output Command

Command [h] D7 D6 D5 D4 D3 D2 D1 D0 Function (bit)

00 CH0 Count initial value CH0 Count initial value (24)
01 RESET SEL ZSEL UD/AB DIR SEL2 SEL1 SEL0 CH0 Operation mode (8)
02 No used ZE1 ZE0 0 CH0 Z-phase/CLR input (3)
03 CH0 count compare value CH0 Comparison register (24)
04 No used Clock data for digital filter CH0 Digital filter (4)
05 CH1 Count initial value CH1 Count initial value
06 RESET SEL ZSEL UD/AB DIR SEL2 SEL1 SEL0 CH1 Operation mode
07 No used ZE1 ZE0 0 CH1 Z-phase/CLR input
08 CH1 count compare value CH1 Comparison register
09 No used Clock data for digital filter CH1 Digital filter
0A CH2 Count initial value CH2 Count initial value
0B RESET SEL ZSEL UD/AB DIR SEL2 SEL1 SEL0 CH2 Operation mode

0C No used ZE1 ZE0 0 CH2 Z-phase/CLR input
0D CH2 count compare value CH2 Comparison register
0E No used Clock data for digital filter CH2 Digital filter
0F CH3 Count initial value CH3 Count initial value

10 RESET SEL ZSEL UD/AB DIR SEL2 SEL1 SEL0 CH3 Operation mode

11 No used ZE1 ZE0 0 CH3 Z-phase/CLR input

12 CH3 count compare value CH3 Comparison register

13 No used Clock data for digital filter CH3 Digital filter

14 No used CH3 LT CH2 LT CH1 LT CH0 LT Latch count value (4)

15 No used TIME CH3 CH2 CH1 CH0 nterrupt latch (5)

16 No used TIME CH3 CH2 CH1 CH0 Sense set (5)

17 Programmable timer setting data Timer data (32)

18 No used START Timer start (1)

19 One-shot pulse width data One-shot pulse (8)

CNT24-4(PCI)

35

I/O Ports and Registers

Table 4.2. Input Command

Command [h] D7 D6 D5 D4 D3 D2 D1 D0 Function (bit)

00 CH0 read count value CH0 Read count value (24)
01 AI Z A B 1 U/D EQ U CH0 Status data (8)
05 CH1 read count value CH1 Read count value (24)
06 AI Z A B 1 U/D EQ U CH1 Status data (8)
0A CH2 read count value CH2 Read count value (24)
0B AI Z A B 1 U/D EQ U CH2 Status data (8)
0F CH3 read count value CH2 Read count value (24)
10 AI Z A B 1 U/D EQ U CH2 Status data (8)
15 0 0 0 TIME CH3 CH2 CH1 CH0 Interrupt mask (5)
16 0 0 0 TIME CH3 CH2 CH1 CH0 Sense port (5)

36

CNT24-4(PCI)

I/O Ports and Registers

Output Command

Count initial value
(Commands; CH0:00h, CH1:05h, CH2:0Ah, CH3:0Fh)

To set a count initial value, execute an OUT command for the
output port (+0) and set output port +1. The count data is 24 bit
data. Output the data eight times, eight bits at time. After the
last eight bits have been output, all data (24 bits) is loaded as the
count initial value.

The following sample program shows how to set the count initial
value 100 (64h) in CH0.

OUT Address+0h, 00h (CH0: Select count data)
OUT Address+1h, 64h (Lower bits)
OUT Address+1h, 00h (Middle bits)
OUT Address+1h, 00h (Upper bits)

Operation Mode
(Command CH0:01h, CH1:06h, CH2:0Bh, CH3:10h)

D6 D5

D7

01h/06h/0Bh/10h UD/ABSEL SEL2

D4

D3 D2 D1

SEL1

D0
SEL0DIRRESET ZSEL

Execute an OUT command for output port +0, then set an operation
mode on output port +1.

RESET Clears the 24 bit up-down counter to "00000h."
During RESET=0, counting is disabled.

0 : Clear counter
1 : Count

CNT24-4(PCI)

37

I/O Ports and Registers

The counter is zero-cleared when one Z-phase input is enabled;
this bit changes to 0 (RESET=0) and one Z-phase input is again
enabled.

SEL : Switches the pulse input for the counter.

ZSEL : Selects logic for Z-phase input

UD/AB, SEL2-SEL0 :

Table 4.3. Counter Operation Mode

UD/AB DIR SEL2 SEL1 SEL0 Operation mode

0

0

0

0

0

0

1

0

0

0 : Photocoupler insulation input
1 : TTL level input

0 : Positive logic (HIGH active)
1 : Negative logic (LOW active)

Set the counter operation mode

0

0

0

0

0

1

1

0

See 2-phase input, Asynchronization clear,

Table4.4. Double multiplication mode

1

0

1

1

0

1

0

1

1

1

2-phase input, Synchronization clear,

0

Single multiplication mode
2-phase input, Synchronization clear,

1

Double multiplication mode
2-phase input, Synchronization clear,

0

Quadruple multiplication mode
2-phase input, Asynchronization clear,

0

Single multiplication mode

1

2-phase input, Asynchronization clear,

0

Single multiplication mode
Single-phase input, Asynchronization clear,

1

Quadruple multiplication mode
Single-phase input with gate control,

1

Asynchronization clear, Double multiplication mode
Single-phase input with gate control,

1

Asynchronization clear, Double multiplication mode

38

CNT24-4(PCI)

DIR : Switches

The rotary encoder counting direction.

Table 4.4. Switching Counting Direction

I/O Ports and Registers

Note!

DIR

0 DOWN UP
1 UP DOWN

Rotary encoder rotation

Clockwise Counterclockwise

In the default setting, all of channels are set 00h.

CNT24-4(PCI)

39

I/O Ports and Registers

Counter Operation Mode

2-phase input

The 2-phase input inputs two different pulses when there is 90
degree difference between the A-phase (forward signal) and the
B-phase (following signal).

Inputting a Z-phase pulse clears the counter if there is a Z-phase
(base position signal).

A-phase
(A-phase/UP)

B-phase
(B-phase/DOWN)

Z-phase
(Z-phase/CLR)

Counting

Figure 4.4. Counting Example with 2-phase Input

Single-phase input

For a single-phase input, the counter counts up with an UP pulse
and counts down with a DOWN pulse. If UP and DOWN pulses
occur at the same time or both pulses are LOW, the counter will not
count properly.

UP pulse
(A-phase/UP)

DOWN pulse
(B-phase/DOWN)

Counting

Figure 4.5. Single-phase Counting Example

Note!

This is a counting operation when DIR=1. If DIR=0, the counter
counts down with the rising edge of an UP pulse and counts up with
the rising edge of a DOWN pulse.

40

0 1 2

5

6

7

8

7

6

CNT24-4(PCI)

I/O Ports and Registers

Single-phase input with gate control

Inputting a gate control signal starts/stops the counter and a single­phase pulse. A clear signal clears the counter to zero.

Single pulse
(A-phase/UP)

Gate control
signal
(B-phase/DOWN)

no count

Note!

Couting

7

6 9

8

Figure 4.6. Example of Single-phase Input with Gate

Control

This is a counting operation when DIR=1. If DIR=0 and the gate
control signal (B-phase/DOWN) is HIGH, the counter counts down
with the rising edge of a single-phase pulse (A-phase/UP).
If DIR=0 and the gate control signal is LOW, the counter stops.

CNT24-4(PCI)

41

I/O Ports and Registers

Synchronization clear

If DIR=1, ZSEL=1, the B-phase input is LOW and the Z-phase
input is HIGH, the counter is cleared with the rising edge of an
A-phase input, and the counter starts counting with the rising edge
of an A-phase input after the Z-phase input changes to LOW.

A-phase
(A-phase/UP)

B-phase
(B-phase/DOWN)

Z-phase
(Z-phase/CLR)

Counting

2 0 11

Figure 4.7. Example of Synchronization Clear

DIR=0 and a B-phase is LOW, the counter starts counting down
with a rising edge of an A-phase input. If ZSEL=0, the Z-phase
input is available only when it is LOW.

Asynchronization clear

If DIR=1, ZSEL=1, regardless of the input state of the A-phase and
B-phase inputs, the counter is zero-cleared when a Z-phase input
changes to HIGH, and regardless of the Z-phase input state, the
counter starts counting with the next rising edge of the A-phase
input.

A-phase
(A-phase/UP)

B-phase
(B-phase/DOWN)

Z-phase
(Z-phase/CLR)

Counting

Figure 4.8. Example of Asynchronization Clear

2

3

11

0

42

If DIR=0 and the B-phase is LOW, the counter starts counting down
with the falling edge of the A-phase input. If ZSEL=0, the
Z-phase input is available only when it is LOW.

CNT24-4(PCI)

I/O Ports and Registers

Count input multiplication

To set the count input multiplication as double or quadruple, more
precise counting is available.

- Double-phase input

- Single-phase input

For single-phase input, only the single multiplication mode is
available. (There is no double or quadruple multiplication.)

- Single-phase input with gate control

Figure 4.9. Counting Example for Multiplied Count Inputs

CNT24-4(PCI)

43

I/O Ports and Registers

Z-phase/CLR input

(Command CH0:02h, CH1:07h, CH2:0Ch, CH3:11h)

02h/07h/0Ch/11h

D7

D6 D5

D4

D3 D2 D1

D0

ZE0 0ZE1Not used

Output a command to output port +0 and set the number of Z-phase
inputs on output port +1.

ZE1, ZE0 : Select Z-phase input mode.

Table 4.5. Z-phase Input Mode

ZE1 ZE0 State

0 1 Disable Z-phase input if there is no Z-phase input.

* 1 0 Only the next Z-phase input is available.

1 1 Every Z-phase input is available.

* mark is the default setting.

- Disabled Z-phase input

- Only next Z-phase input is available

44

- Every Z-phase input is available

Figure 4.10. Number of Z-phase Inputs Available ZSE=0

(Positive Logic)

CNT24-4(PCI)

I/O Ports and Registers

Notes!

- The default is "only the next Z-phase input is available." (04h)

- If ZSEL=1 (negative logic), a LOW Z-phase input is available.

- If the Z-phase/CLR input is not used, set ZE1=0 and ZE0=1
(Disable Z-phase input).

- If "only the next Z-phase input is available" is set and the
counter is zero-cleared with the Z-phase input, and if the counter
is cleared with RESET=0, "only the next Z-phase input is
available" will be set with the RESET=0.

Comparison register

(Command CH0:03h, CH1:08h, CH2:0Dh, CH3:12h)

The counter value of the corresponding channel and the data in the
comparison register are compared. If they match, the status bit
"EQ" is set to 0. (As long as they match, the bit remains 0.) This
register is cleared when the bus is reset.

Output the command on the output port +0 and set the comparison
data on the output port +1. The comparison data is 24 bit data.
Output the data three times, eight bits at a time, from the lower bits,
the middle bits and the upper bits.

The following sample program shows how to set the counting
comparison value 1000 (3E8h) to CH1.

OUT Address+0h, 03h (CH1 : Select comparison register)
OUT Address+1h, E8h (Lower bits)
OUT Address+1h, 03h (Middle bits)
OUT Address+1h, 00h (Upper bits)

In addition, a particular setting can output a one-shot pulse.
(For more details, see "One-shot Pulse" description.)

CNT24-4(PCI)

45

I/O Ports and Registers

D

4

D

0

Digital filter

(Command CH0:04h, CH1:09h, CH2:0Eh, CH3:13h)

Note!

04h/09h/0Eh/13h

D7

D6 D5

D3 D2 D1

Digital filter clock dataNot used

The digital filter filters noise on the counter pulse input (A, B or Z­phase signals ). The digital filter clock data determines the
sampling clock frequency of the filter. The filter samples with the
sampling clock; if it detects HIGH (or LOW) signals for four
consecutive clocks, it outputs a HIGH (or LOW) signal and sends
the signal to the counter circuit.

Output a command to output port +0 and set the sampling
frequency on the output port +1. The range is 100nsec -1056.1
usec.

Since external input signals (except the general input signal) are
read into the internal counter through the digital filter, these signals
are read after a four clock delay of the sampling frequency. With
the default setting, external input signal is read with 400nsec delay.

46

CNT24-4(PCI)

I/O Ports and Registers

External
input signal

External
input signal

PC
input signal

Digital
Filter

4 clock of the sampling frequency

in valid

valid

PC
input signal

Figure 4.11. Digital Filter

Table 4.6. Digital Filter Clock Data

D3 D2 D1 D0 Clock frequency Input frequency numbers

0 0 0 0
0 0 0 1 6.5µsec 15
0 0 1 0
0 0 1 1 32.1µsec 3
0 1 0 0
0 1 0 1 211.3µsec 470Hz
0 1 1 0
0 1 1 1 236.9µsec 420
1 0 0 0
1 0 0 1 825.7µsec 121
1 0 1 0
1 0 1 1 851.3µsec 117
1 1 0 0
1 1 0 1 1030.5µsec 96
1 1 1 0
1 1 1 1 1056.1µsec 94

* The accuracy is 0.01% of the setting frequency.

0.1µsec

25.7µsec

204.9µsec

230.5µsec

819.3µsec

844.9µsec

1024.1µsec

1049.7µsec

about under 1MHz

3.5

480Hz

430

122

118

97

95

Notes!

- The default is 100nsec setting.

- Some noise causes more than a four clock delay of the set
frequency.

- If the level changes faster than the sampling clock frequency that
has been set, the level change is invalid and there is no count.
Latch count.

CNT24-4(PCI)

47

I/O Ports and Registers

Latch Count value (Command 14h)

D4

D3 D2 D1

CH3 LTNot used CH2 LTCH1 LT CH0 LT

14h

D7

D6 D5

The counter value of the corresponding channel is latched in the
read-out register.

Output 14h to the output port +0 and set the data latch on output
port +1. Data is latched by setting an appropriate bit to "1."
By setting all bits, all channels can be latched at the same time.

Note!

The default is not latched (00h).

Interrupt mask (Command 15h)

D6 D5

D7

15h TIMENot used CH2

Output 15h to output port +0 and set the mask on output port +1.
By setting an appropriate bit to "1," the interrupt is disabled.

TIME : Setting this bit to "1" disables the interrupt that

CH3-CH0 : These bits correspond to the channels. Setting these

D4

D3 D2 D1

signals that the programmable timer has elapsed for
the predetermined time. Setting this bit to "0",
enables the interrupt.

bit to "1," enables the interrupt that notifies the count
match. Setting these bits "0," enables the interrupt.

CH1

D0

D0
CH0CH3

48

Notes!

- In the default setting, all of the four channels and the timer are
disabled (1Fh).

- However, to mask a channel or the timer will not effect the
function of setting/resetting the related status.

CNT24-4(PCI)

Sense Reset (Command 16h)

I/O Ports and Registers

D6 D5

D7

Not used

16h TIME

D4

D3 D2 D1

CH2

CH3

CH1

D0

CH0

When the counts of the channels match or the timer count is up, the
corresponding bit changes "1" If this bit is "1", the interrupt does
not occur with the next count match or the timer count is up.
Outputting 16h to output port +0 and outputting "1" to the
corresponding bit of output port +1 clear the sense bit. The next
interrupt signal can be generated.

TIME : Resets the sense bit when the progr ammable timer

count is up.

CH3-CH0 : Resets the sense bit for count match of the channels.

CNT24-4(PCI)

49

I/O Ports and Registers

Programmable time

(Command timer data:17h, Timer start:18h)

D7

17h

D6 D5

D4

Programable timer data

D3 D2 D1

D0

18h

D7

D6 D5

D4

D3 D2 D1

Not used START

D0

The programmable timer generates an interrupt with a frequency
that has been set in the 32 bit data. To generate an interrupt by the
timer, set the 32 bit data, then set the START bit to "1".

To set the programmable timer, output 17h to output port +0 and set
the timer data on output port +1. Since the timer data is 32 bit data,
output the data four times, eight bits at a time, from the lower bits to
the upper bits. The range is 1msec - 200sec.

To start the timer, output the timer start command (18h) and set the
corresponding bit on output port +1. Setting the bit to "0" stops
the timer.

Table 4.8. shows the relationship between the programmable timer
data and the timer interrupt frequency.

Example : The following program sample show how to set the
programmable timer to 1 second.

OUT Address+0h, 17h (Select timer setting)
OUT Address+1h, FFh (Lowest bits)
OUT Address+1h, 2Ch (Lower bits)
OUT Address+1h, 31h (Upper bits)
OUT Address+1h, 01h (Highest bits)
OUT Address+0h, 18h (Select timer start)
OUT Address+1h, 1h (Timer start)

50

Note!

In the default setting, the timer is disabled.

CNT24-4(PCI)

Timer interrupt frequency

The timer interrupt frequency is obtained from following
equation :

I/O Ports and Registers

( Timer Data x 50 + 50) x 10 = Timer interrupt frequency (msec)

32 bits (converted to decimal)

-6

Table 4.7. Relationship between programmable timer

interrupt

Programmable timer data (Hex) Timer interrupt

High byte Low byte frequency

0 0 0 0 4 E 1 F 1msec
0 0 0 3 0 D 3 F 10msec
0 0 1 E 8 4 7 F 100msec
0 1 3 1 2 C F F 1sec
0 2 6 2 5 9 F F 2sec
0 3 9 3 8 6 F F 3sec
0 4 C 4 B 3 F F 4sec
0 5 F 5 E 0 F F 5sec
0 7 2 7 0 D F F 6sec
0 8 5 8 3 A F F 7sec
0 9 8 9 6 7 F F 8sec
0 A B A 9 4 F F 9sec
0 B E B C 1 F F 10sec
1 1 E 1 A 2 F F 15sec
1 7 D 7 8 3 F F 20sec
2 3 C 3 4 5 F F 30sec
2 F A F 0 7 F F 40sec
3 B 9 A C 9 F F 50sec
7 7 3 5 9 3 F F 100sec
B 2 D 0 5 D F F 150sec
E E 6 B 2 7 F F 200sec

* The accuracy is 0.01% of the setting frequency.

CNT24-4(PCI)

51

I/O Ports and Registers

One-shot pulse (Command 19h)

D6 D5

D7

19h One-shot pulse width data

D4

D3 D2 D1

D0

When the counter values on the channels and the value in the
comparison register match, a one-shot pulse is output to each
channel. The pulse width is common to all channels and
determined by the data that is set. The range is 0msec -

104.45msec.

To set the pulse width, output the command (19h) to output port +0
and set the pulse width on output port +1. The one-shot width is
obtained from the following equation:

Pulse width data x 409.6 = Pulse width (used)

8 bits (converted to decimal)

Table 4.8. Relationship Between One-shot Pulse Width

Data and Pulse Width

One-shot pulse width data

D7 D0 [h] Pulse width

0 0 0 0 0 0 0 0 00h 0
0 0 0 0 0 0 0 1 01h
0 0 0 0 0 0 1 0 02h About 819.2µsec
0 0 0 0 0 0 1 1 03h About 1.23msec
0 0 0 0 1 1 0 0 0Ch About 4.92msec
0 0 0 1 1 0 0 1 19h About 10.24msec
0 0 1 1 0 0 0 1 31h About 20.07msec
0 1 0 0 1 0 0 1 49h About 29.9msec
0 1 1 0 0 0 1 0 62h About 40.14msec
0 1 1 1 1 0 1 0 7Ah About 49.97msec
1 0 0 1 0 0 1 1 93h About 60.2msec
1 0 1 0 1 0 1 1 ABh About 70.04msec
1 1 0 0 0 1 0 0 C4h About 80.28msec
1 1 0 1 1 1 0 0 DCh About 90.11msec
1 1 1 1 0 1 0 1 F5h About 100.35msec
1 1 1 1 1 1 1 1 FFh About 104.45msec

About 409.6µsec

52

Notes!

- The default is "Pulse width = 0 (00h)" (not output).

- The pulse width may fluctuate depending on the connection load
specification.

CNT24-4(PCI)

Input Command

Read count value

(Command CH0:00h, CH1:05h, CH2:0Ah, CH3:0Fh)

By reading the read-out register of the corresponding channel the
count can be read.

To read the count, output the command to output port +0 and read
input port +1 three times (lower, middle, and upper bits).

The default of the read-out register is not determined.
The following sample program shows how to read the CH2 counter

value :

OUT Address+0, 0Ah (Select CH2 count data)
IN Address+1, (Lower bits)
IN Address+1, (Middle bits)
IN Address+1, (Upper bits)

Note!

First set the CH2 data latch to "1."

I/O Ports and Registers

CNT24-4(PCI)

53

I/O Ports and Registers

Status data
(Command CH0:01h, CH1:06h, CH2:0Bh, CH3:10h)

D6 D5

01h/06h/0Bh/10h AI Z A B

D7

D4

D3 D2 D1

U/D EQ

1

D0

U

To monitor signal input, counting direction, count match and
invalid input, output a command to output port +0 and read input
port +1.

AI : This bit changes to "1" (pulse invalid input) if A-phase and

B-phase change at the same time for 2-phase input or if the
UP pulse and DOWN pulse change at the same time.

1 : Invalid input
0 : No invalid input

Z : This bit shows the Z-phase input status

<Positive logic>
1 : Z-phase input status "1"
0 : Z-phase input status "0"
<Negative logic>
1 : Z-phase input status "0"
0 : Z-phase input status "1"

A : This bit shows the A-phase input status

1 : A-phase input status "1"
0 : A-phase input status "0"

B : This bit shows the B-phase input status

1 : B-phase input status "1"
0 : B-phase input status "0"

54

U/D : Counting direction status

This status bit shows the counting direction of the current.

0 : Counting up
1 : Counting down

EQ : Detected match

0 : Counter value and register value matched.
1 : Counter value and register value did not match.

CNT24-4(PCI)

Notes!

I/O Ports and Registers

U : Shows the general input status

1 : General input status "1"
0 : General input status "0"

- The default changes depending on the external connection status.

- Since the status data of A-phase, B-phase and Z-phase is the data
after the filtering process, it has a 4 clock delay in the frequency
that has been set.

- Z-phase logic is set by the ZSEL of the operation mode setting.

CNT24-4(PCI)

55

I/O Ports and Registers

Interrupt mask (Command 15h)

D6 D5

D7

15h TIMENot used CH2

This shows the interrupt mask register status.
TIME and CH3 - CH0 monitor the current interrupt mask status that

has been output to the interrupt mask set port. TIME corresponds
to the programmable timer and CH3-CH0 corresponds to each
channel. If these bits are "1," the interrupt is masked and an
interrupt signal is not output.

To monitor the mask status, output 15h to the output port +0 and
read the input port +1.

0 : Masked
1 : Not masked

Note!

The default is 1Fh.

Sense port (Command 16h)

D6 D5

D7

16h TIMENot used CH2

This shows the channel count match and count-up. To monitor the
sense port, output 16h to output port +0 and read input port +1.

TIME : This bit is set to "1" when the time set in the

program mable timer has elapsed.

CH3-CH0 : For any channel between CH3-CH0, when a value

in the up/down counter and the comparison register
matches, the bit for the channel is set to "1." The
interrupt channel is determined by executing
counting on multiple channels and generating an
interrupt on the "matched" signal.
0 : Count did not match - Timer continues counting
1 : Count matches - Timer stops counting

Notes!

- The default is 00h.

- If an interrupt is e nabled and generated and the TIME bit or one
of the CH3 to CH0 bits changes to "1" reset the corresponding
sense bit to enable the next interrupt. For details on sense bit
resetting, see "Sense Bit Reset" of the output port.

D4

D4

D3 D2 D1

CH1

D3 D2 D1

CH1

D0
CH0CH3

D0

CH0CH3

56

CNT24-4(PCI)

I/O Ports and Registers

Default Setting

The power on or a reset signal will reset this board to the default
settings.

Table 4.9. Default Setting

Item Default setting
Operation mode 00h
Z-phase/CLR input 04h
Comparison register 0
Read register unfixed
24-bit up/down counter 000000h
Digital filter 00h (0.1µsec)
Status data 7Bh (not connected for external)
Latch count value 00h
Interrupt mask 1Fh (all disable)
Sense port 00h
Timer data 00000000h
Timer start 00h (stop timer)
One-shot pulse 00h (not output)

CNT24-4(PCI)

57

I/O Ports and Registers

58

CNT24-4(PCI)

5. System Reference

Specifications

Table 5.1. Specifications

Item Specification
Number of Channels 4Channels
Count Format Up/Down binary count
Max. Count Value FFFFFFh
Input Format Opto-isolated or TTL-level
Input Signal OUT A (Up) 1 per channel

Internal Resistance Photo. : 220

Maximum Input Photo. : 500KHz (Duty : 50%)
Frequency TTL. : 1MHz (Duty : 50%)

Counter InputCount-equal OutputGeneral

Interrupt Interrupt signal is generated when timer is up or

Interrupt Level IRQ 3 - 7, 9 - 12, 14, 15
External Power 5 - 12VDC 10%, 400mA (Min. )
Photocoupler Input 15 - 25mA
Current
Digital Filter 100nsec - 1056.1µsec

Timer 1msec - 200sec
Number of Channels 4
Output Format Photo-coupler open-collector output
Output Voltage Max. 35VDC, 50mA (per channel)
Output Signal Width 0 - 104.45msec (all channels)
External Power 5 - 12VDC
I/O Address 8 bits x 4 ports
Dimensions 179.0 x 107.0 x 18.5 mm
Power Consumption 5VDC, 400mA (Max.)
Operation Temperature 0 - 50°C
Relative Humidity 20 - 90%

System Reference

OUT B (Down) 1 per channel
OUT Z (CLR) 1 per channel
Digital Input 1 per channel

Ω

TTL. : 1 LEVEL

the comparison value and the counter value of
the corresponding channel watch

(each channel can be set independently)

CNT24-4(PCI)

59

System Reference

Block Diagram

The following is a block diagram of the CNT24-4(PCI) interface
board.

PCI Bus

System
clock
20MHz

Sampling clock 16-bit counter
for digital filter

24-bit read register

24-bit counter

Selector

PCI Bus Interface

24-bit comparator

24-bit compare register

One-shot pulse output

Digital filter

CNT24-4(PCI)

Photocoupler
resistance input
(4channels)

TTL level input

Buffer

(4 channels)

One-shot pulse output
(4 channels)
(photocoupler open
collector output)

60

Figure 5.1. Block Diagram

CNT24-4(PCI)

6. Troubleshooting

If you are having trouble with your board or program, answer the
following questions to see if you can find the problem.

QUESTIONS:

STEPS TO TAKE

Is the pilot light on?

The system must be turned on and the power supply must be
working. Check the main power switch and the power supply.

Did the system boot up?

If the board has been installed and the system did not boot, check
the following:

- Make sure the board has been inserted firmly. Pull it out and try
to reboot. If your system reboots, then re-insert the board and
try to boot again.

- Check that cables attached to your other boards fit tightly.

Troubleshooting

Does your program work?

If the system booted and your program does not work, check the
following:

- Rotary switches have been set correctly for the desired base
address.

- Selected base address doesn't conflict with another peripheral
device or card installed in the computer.

- Selected interrupt levels don't conflict with interrupts required by
other devices or cards.

- Try one of the sample programs provided on the disk and see if it
works.

Does the sample program work?

Check the following:

- Signals are connected to the correct pins.

CNT24-4(PCI)

61

Troubleshooting

- Pin connections on the I/O cables are secure.

- Signals are present at the external connectors.

- Try using the CNT24-4(PCI) board with other non-essential
boards removed. Remove other boards one by one, checking the
CNT24-4(PCI) for successful operation after each board is
removed.

Is the input data accurate?

If you believe something is wrong with either the input data or the
output data, check the following:

- Environmental noise. Move the equipment and cables away
from sources of electrical noise. Try an isolated power source.

- Dirty connector edge. Clean the edge.

- External connectors fit tightly. Separate and reattach external
cables.

Still have a problem?

Contact CONTEC group office where you purchased as shown in
the last page of this manual.

Note!

Before you call, make a list of the following information. Our
technical representatives will need the following information to help
you.

62

1. Your name, company, and phone number.

2. The brand and type of computer you are using (e.g. IBM-AT,

Compaq 386).

CNT24-4(PCI)

Troubleshooting

3. DOS Version.

4. Name of the CONTEC board that you are using.

5. Names of other boards in the computer.

6. I/O addresses for the CONTEC board and all other boards.

7. Interrupt levels for the CONTEC board and all other boards.

8. DMA channels for the CONTEC board and all other boards

(if applicable).

9. The programming language that you are using (and the version

number).

CNT24-4(PCI)

63

Troubleshooting

10. Different I/O addresses you have tried.

11. Are you using your own program or a CONTEC sample

12. List AUTOEXEC.BAT.

13. List CONFIG.SYS.

program.

64

CNT24-4(PCI)

7. Index

Index

B

Block Diagram, 60
Board ID, 6, 15, 16, 18

C

Component Locations, 5

D

DT/B2, 23, 26

F

Features, 1

I

I/O Port Assignment, 33
I/O Ports, 33
Interface Connector, 23
Introduction, 1

R

Registers, 33

S

Setup, 5
Specification, 59
Support software, 20, 22
System Reference, 59

T

Trouble shooting, 61

W

Warranty, 2
Windows 3.1, 8
Windows 95, 14
Windows NT, 21

M

MS-DOS, 8

O

Obtain Service, 2

CNT24-4(PCI)

65

A-41-781

000707 [971007]

LZC6961

CONTEC Group

JAPAN : Headquarters

CONTEC CO., LTD.
3-9-31, Himesato, Nishiyodogawa-ku, Osaka 555-0025, Japan
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

U.S.A. : CONTEC MICROELECTRONICS U.S.A. INC.

2161 O’ Toole Ave. Suite I, San Jose, CA95131, U.S.A.
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

EUROPE : CONTEC MICROELECTRONICS EUROPE B.V.

Binnenweg 4, 2132 CT, Hoofddorp, The Netherlands
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

KOREA : HYOJIN CONTEC CO., LTD.

KI-IM Bldg.#399, Shindolim-Dong, Kuro-ku, Seoul 152-070,Korea
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

CHINA : INTERNATIONAL CONTEC TECHNOLOGY CO., LTD.

B-809, Hua Tong Building, No. B19, Che Gong Zhuang West Road,
Hai Dian District, Beijing 100044, China
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

SHANGHAI CONTEC MICROELECTRONICS CORPORATION.
No. 481, Gui Ping Road, Cao He Jing,Hi-Tech Park, Shanghai 200233, China
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

SHENYANG CONTEC MICROELECTRONICS CO., LTD.
No. 169, Qingnian Street, Shenhe District, Shenyang 110015, China
Tel : [phone] Fax : [phone]

TAIWAN : MACROMATE CORP.

8F, Universal Center, No.179,Sec.1, Ta-Tung Road, Hsi-Chih, Taipei Hsien, Taiwan
R.O.C.
Tel : [phone] Fax : [phone]
E-mail : [e-mail]

A-46-368 Ver. 2003. 07. 28