Acromag IOS-484 User manual

IOS-484

Counter Timer Module

USER’S MANUAL

ACROMAG INCORPORATED Tel: (248) 295-0310

30765 South Wixom Road Fax: (248) 624-9234

P.O. BOX 437

Wixom, MI 48393-7037 U.S.A.

[email protected]

Data and specifications are subject to change without notice. 8500-850-B11C007

IOS-484 I/O Server Module User’s Manual Counter Timer Module

__________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

IMPORTANT SAFETY CONSIDERATIONS

You must consider the possible negative effects of power, wiring,

component, sensor, or software failure in the design of any type of

control or monitoring system. This is very important where property

loss or human life is involved. It is important that you perform

satisfactory overall system design and it is agreed between you and

Acromag, that this is your responsibility.

1.0 General Information

KEY IOS-484 COUNTER/TIMER FEATURES............

IOS MODULE Win32 DRIVER SOFTWARE…………

IOS MODULE LINUX SOFTWARE……………………

2.0 PREPARATION FOR USE

UNPACKING AND INSPECTION...…………………...

BOARD CONFIGURATION..........................………...

CONNECTORS........…………………………………….

IOS Field I/O Connector (P2)…....…………...

I/O Noise and Grounding Considerations.......

3.0 PROGRAMMING INFORMATION

IOS IDENTIFICATION SPACE.....…….………………

MEMORY MAP..............................................………...

Board Control Register.....................................

Interrupt Status/Clear Register........…………..

Counter Trigger Register..................................

Counter Stop Register...……………….………..

Counter Read Back Register....………………...

Counter Constant A Register.……………….....

Counter Constant B Register............................

Digital Input Register………..............................

Digital Output Register………...........................

Interrupt Vector Register………........................

COUNTER CONTROL REGISTER.............................

Quadrature Position Measurement…...............

Pulse Width Modulation......……...……...……...

Watchdog Timer Operation.……………...……..

Event Counting Operation..........................…...

Frequency Measurement Operation.................

Input Pulse Width Measurement……………….

Input Period Measurement.……………………..

One-Shot Pulse Mode.........……………………..

TABLE OF

CONTENTS

The information of this manual

may change without notice.

Acromag makes no warranty

of any kind with regard to this

material, including, but not

limited to, the implied

warranties of merchantability

and fitness for a particular

purpose. Further, Acromag

assumes no responsibility for

any errors that may appear in

this manual and makes no

commitment to update, or

keep current, the information

contained in this manual. No

part of this manual may be

copied or reproduced in any

form without the prior written

consent of Acromag, Inc.

IOS-484 I/O Server Module User’s Manual Counter Timer Module

___________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

PROGRAMMING EXAMPLES…………………………

Quadrature Position Measurement Example..

Pulse Width Modulation Example....…...……...

Watchdog Timer Operation Example...............

Event Counting Operation Example.................

Frequency Measurement Operation Example.

Input Pulse Width Measurement Example.......

Input Period Measurement Example................

One-Shot Pulse Mode Example........................

4.0 THEORY OF OPERATION

FIELD INPUT/OUTPUT SIGNALS…...………………..

Counter/Timers…………………...........………...

Digital I/O…………………….………………..……

5.0 SERVICE AND REPAIR

SERVICE AND REPAIR ASSISTANCE...…………...

PRELIMINARY SERVICE PROCEDURE...…………..

WHERE TO GET HELP..............................................

6.0 SPECIFICATIONS

PHYSICAL..................................................................

ENVIRONMENTAL....…….……………………………..

COUNTER/TIMERS……...............................…….…..

DIGITAL I/O………………………………………………

DRAWINGS

IOS-484 BLOCK DIAGRAM.........….…....

RS485 I/O CONNECTIONS……………….

Trademarks are the property of their respective owners.

TABLE OF

CONTENTS

IOS-484 I/O Server Module User’s Manual Counter Timer Module

__________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

The I/O Server Module (IOS) Series IOS-484 module provides support

for five independent 16-bit multifunction counter/timers. Each counter/timer

can be configured for quadrature position measurement, pulse width

modulated output, watchdog timer, event counter, frequency measurement,

pulse width measurement, period measurement, or one shot pulse output.

Important Note: The following IOS model are accessories to the IOS

Server Models: IOS-7200, IOS-7200-WIN, IOS-7400, and IOS-7400-WIN;

which are cULus Listed. This equipment is suitable for use in Class I,

Division 2, Groups A, B, C, and D or non-hazardous locations only.

MODEL

Counters

I/O Type

OPERATING TEMPERATURE

RANGE

IOS-484

5 16-bit

RS485/RS422

-40C to +85C

TTL/Differential I/O –The IOS-484 model has only RS485/RS422 I/O

available. Mixed TTL and RS485/RS422 I/O are available on the IOS-

483. The IOS-482 Counter/Timer I/O is available as TTL only.

Quadrature Position Measurement –Three input signals can be used

to determine bi-directional motion. The sequence of logic high pulses

for two input signals, A and B, indicate direction and a third signal

(index) is used to initialize the counter. X1, X2, and X4 decoding is also

implemented. X1 decoding executes one count per duty cycle of the A

and B signals, while X2, and X4 execute two and four counts per duty

cycle, respectively.

Pulse Width Modulation –Each counter can be programmed for pulse

width modulation. The duration of the logic high and low levels of the

output signal can be independently controlled. An external gate signal

can also be used to start/stop generation of the output signal.

Watchdog Timer –Each counter can be configured as a countdown

timer for implementation as a watchdog timer. A gate-off signal is

available for use to stop the count down operation. Interrupt generation

upon a countdown to zero condition is available.

Event Counter –Each counter can be configured to count input pulses

or events. A gate-off signal is provided to control count-up or count

down with each event. Interrupt generation upon programmed count

condition is available.

Frequency Measurement –Each counter can be configured to count

how many active edges are received during a period defined by an

external count enable signal. An interrupt can be generated upon

measurement complete.

Conduction Cooled Module - I/O modules employ advanced thermal

technologies. A thermal pad and module cover wicks heat away from

the module and transfers the energy to a heat spreading friction plate.

Heat moves to the enclosure walls where it is dissipated by the external

cooling fins.

1.0 GENERAL

INFORMATION

Table 1.1: The IOS-484

module temperature range

KEY IOS-484

COUNTER/TIMER

FEATURES

IOS-484 I/O Server Module User’s Manual Counter Timer Module

___________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

Pulse-Width or Period Measurement –Each counter can be

configured to measure pulse-width or waveform period. In addition, an

interrupt can be generated upon measurement complete.

One-Shot and Repetitive One-Shot –A one-shot pulse waveform may

also be generated by each counter. The duration of the pulse and the

delay until the pulse goes active is user programmable. A repetitive

one-shot can be initiated with repetitive trigger pulses.

Programmable Interface Polarity –The polarities of the counter’s

external trigger, input, and output pins are programmable for active high

or low operation.

Internal or External Triggering –A software or hardware trigger is

selectable to initiate quadrature position measurement, pulse width

modulation, watchdog countdown, event counting, frequency

measurement, pulse-width measurement, period measurement, or one

shot.

Digital I/O –The IOS-484 has 3 RS485/RS422 outputs and 1

RS485/RS422 input available for use.

Acromag provides a software product (sold separately) to facilitate the

development of Windows Embedded Standard applications interfacing with

I/O Server Modules installed on Acromag Industrial I/O Server systems.

This software (Model IOSSW-DEV-WIN) consists of a low-level driver and

Windows 32 Dynamic Link Libraries (DLLS) that are compatible with a

number of programming environments including Visual C++, Visual

Basic.NET, Borland C++ Builder and others. The DLL functions provide a

high-level interface to the IOS carriers and modules eliminating the need to

perform low-level reads/writes of registers, and the writing of interrupt

handlers.

Acromag provides a software product (sold separately) consisting of

Linuxsoftware. This software (Model IOSSW-API-LNX) is composed of

Linux libraries designed to support applications accessing I/O Server

Modules installed on Acromag Industrial I/O Server systems The software is

implemented as a library of ―C‖ functions which link with existing user code

KEY IOS-484

COUNTER/TIMER

FEATURES

IOS MODULE Win32

DRIVER SOFTWARE

IOS MODULE LINUX

SOFTWARE

2.0 PREPARATION

FOR USE

IOS-484 I/O Server Module User’s Manual Counter Timer Module

__________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

Upon receipt of this product, inspect the shipping carton for evidence of

mishandling during transit. If the shipping carton is badly damaged or water

stained, request that the carrier's agent be present when the carton is

opened. If the carrier's agent is absent when the carton is opened and the

contents of the carton are damaged, keep the carton and packing material

for the agent's inspection.

For repairs to a product damaged in shipment, refer to the Acromag

Service Policy to obtain return instructions. It is suggested that salvageable

shipping cartons and packing material be saved for future use in the event

the product must be shipped.

This board is physically protected with packing material and electrically

protected with an anti-static bag during shipment. However, it is

recommended that the board be visually inspected for evidence of

mishandling prior to applying power.

Power should be removed from the board when installing IOS modules,

cables, termination panels, and field wiring. Refer to the following

discussion for configuration and assembly instructions. Model IOS-484

Counter/Timer Boards have no jumpers or switches to configure—all

configuration is through software commands.

P2 provides the field I/O interface connector for mating IOS modules to the

carrier board. P2 is a 50-pin female receptacle header (AMP 173279-3 or

equivalent) which mates to the male connector of the carrier board (AMP

173280-3 or equivalent). This provides excellent connection integrity and

utilizes gold-plating in the mating area. The field and logic side connectors

are keyed to avoid incorrect assembly.

P2 pin assignments are unique to each IOS model (see Table 2.1) and

normally correspond to the pin numbers of the field-I/O interface connector

on the carrier board (you should verify this for your carrier board).

UNPACKING AND

INSPECTION

WARNING: This board

utilizes static sensitive

components and should

only be handled at a static-

safe workstation.

BOARD

CONFIGURATION

CONNECTORS

IOS Field I/O Connector (P2)

IOS-484 I/O Server Module User’s Manual Counter Timer Module

___________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

Description

Number

Description

Number

RS485/RS422

In1_A+

In4_B-

In1_A-

In5_B+

In2_A+

In5_B-

In2_A-

In1_C+

In3_A+

In1_C-

In3_A-

In2_C+

In4_A+

In2_C-

In4_A-

In3_C+

In5_A+

In3_C-

In5_A-

In4_C+

In1_B+

In4_C-

In1_B-

In5_C+

In2_B+

In5_C-

In2_B-

DIn1+

In3_B+

DIn1-

In3_B-

Out5+

Out1+

Out5-

Out1-

DOut1+

Out2+

DOut1-

Out2-

DOut2+

Out3+

DOut2-

Out3-

DOut3+

Out4+

DOut3-

Out4-

D.N.C.1

In4_B+

GND

Table 2.1: IOS-484 Field I/O

Pin Connections

The IOS-484 has 5

RS485/RS422 16-bit counters

available.

Additionally, it has 1 RS485

Digital Input and 3 RS485

Digital Outputs. The Digital

I/O’s are emphasized in bold

italics.

1. Do Not Connect: Pin has

direct connection to FPGA.

Reserved for programming

purposes. (TDI#) Pin has

active pull-up.

IOS-484 I/O Server Module User’s Manual Counter Timer Module

__________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

The IOS-484 is non-isolated between the logic and field I/O grounds

since output common is electrically connected to the IOS module ground.

Consequently, the field I/O connections are not isolated from the carrier

board and backplane. Two ounce copper ground plane foil has been

employed in the design of this model to help minimize the effects of ground

bounce, impedance drops, and switching transients. However, care should

be taken in designing installations without isolation to avoid noise pickup

and ground loops caused by multiple ground connections.

To minimize high levels of EMI the signal ground connection at the field

I/O port (pin 50) should be used to provide a path for induced common-

mode noise and currents. The ground path provides a low-impedance path

to reduce emissions.

EIA RS485/RS422 communication distances are generally limited to less

than 4000 feet. To minimize transmission-line problems, all nodes

connected to the cable must use minimum stub length connections. The

optimal configuration for the RS485/RS422 bus is a daisy-chain connection

from node 1 to node 2 to node 3 to node n. The bus must form a single

continuous path, and the nodes in the middle of the bus must not be at the

ends of long branches, spokes, or stubs. See RS485 I/O Connections for

example connection and termination practices.

Transmission line signal reflections can be minimized with proper

termination. The EIA RS485/RS422 standard allows up to 32

driver/receivers to be connected to a single bus. Termination resistors

should only be used at the two extreme ends of the bus and not at each of

the nodes of the bus. Termination resistors are not provided on the IOS-

484. They can be added to the field wiring as near to the IOS module as

possible.

CONNECTORS

I/O Noise and Grounding

Considerations

IOS-484 I/O Server Module User’s Manual Counter Timer Module

___________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

This Section provides the specific information necessary to program and

operate the IOS-484 module.

Each IOS module contains identification (ID) information that resides in

the ID space per the IOS module specification. This area of memory

contains 32 bytes of information at most. Both fixed and variable

information may be present within the ID space. Fixed information includes

the "IOS" identifier, model number, and manufacturer's identification codes.

Variable information includes unique information required for the module.

The IOS-484 ID space does not contain any variable (e.g. unique

calibration) information. ID space bytes are addressed using only the odd

addresses in a 64 byte block (on the ―Big Endian‖ VMEbus). Even

addresses are used on the ―Little Endian‖ PC ISA or PCI buses.

The IOS-484 ID Space is shown in Table 3.1. Note that the base-

address for the IOS module ID space (see your carrier board instructions)

must be added to the addresses shown to properly access the ID

information. Execution of an ID Space Read operation requires 0 wait

states.

Hex Offset

From ID Base

Address

Numeric

Value

(Hex)

Field Description

Acromag ID Code

IOS Model Code1

Not Used

(Revision)

Reserved

Not Used

Total Number of ID

PROM Bytes

CRC

18 to 3E

Not Used

3.0 PROGRAMMING

INFORMATION

IOS Identification

Space

(Read Only)

Table 3.1: IOS-484 ID Space

Identification (ID)

1. The IOS model number is

represented by a two-digit

code within the ID space. The

IOS-484 is represented by 47

Hex.

IOS-484 I/O Server Module User’s Manual Counter Timer Module

__________________________________________________________________

_________________________________________________________________________________________

Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:solutions@acromag.com http://www.acromag.com

This board is addressable in the IOS space to monitor and control the

status and configuration of up to five 16-bit counter/timers. Additionally,

there are Digital I/O available for use. The IOS-484 has one RS485/RS422

digital input and three RS485/RS422 digital outputs. All the Digital I/O’s are

controlled by the Digital Registers. The I/O space may be as large as 64,

16-bit words (128 bytes) using address lines A1..A6, but the IOS-484 uses

only a portion of this space.

The memory space address map for the IOS-484 is shown in Table 3.2.

Note that the base address for the IOS-484 in memory space must be

added to the addresses shown to properly access the IOS-484 registers.

Accesses are generally performed on a 16-bit basis (D0..D15), but 8-bit

(D0..D8) (EO) accesses are possible in most cases.

HIGH

Base

Addr.+

HIGH Byte

D15 D08

LOW Byte

D07 D00

LOW

Base

Addr.+

Board Control Register

Counters Interrupt Status/Clear

Counter Trigger Register

Counter Stop Register

Counter 1 Control Register

Counter 2 Control Register

Counter 3 Control Register

Counter 4 Control Register

Counter 5 Control Register

↓

Not Used1

↓

Counter 1 Read Back Register

Counter 2 Read Back Register

Counter 3 Read Back Register

Counter 4 Read Back Register

Counter 5 Read Back Register

↓

Not Used1

↓

MEMORY MAP

Table 3.2: IOS-484 Memory

Map

1. The IOS-484 will return 0 for

all addresses that are "Not

Used".

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