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72-UMM-DLL: 产品描述CONTROLLERS MicroDAC LT (Optomux); 文件大小729KB，共2页; 制造商Grayhill; 官网地址http://www.grayhill.com

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72-UMM-DLL概述

CONTROLLERS MicroDAC LT (Optomux)

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System 50

CONTROLLERS

MicroDAC LT (Optomux)

FEATURES

• Each Unit Controls/Monitors up to

32 Analog (G5 Only) and/or Digital

I/O Modules

• Executes On-Board Programs

Created With Borland C

• Network up to 64 MicroDAC LTs

per Host Serial Port, Spanning as

Much as 4000 Feet

• Communicate Over RS-422 /485 at

Speeds From 1200 Baud to

115.2 KB

• 100% Optomux Compatible, With

Expanded Command Set

• I/O Update Rates of 500 µSec per

32 Digital I/O, and 10 mS per

Analog Input or 2 Analog Outputs

• 64-Bit Floating Point Math

APPLICATIONS

and control the outputs. In addition to simple

ON/OFF instructions, commands are included

which permit you to:

• Sample analog signals at 10 mS per input

• Flag values above or below prescribed levels

• Capture min/max values

• Calculate the average input signal levels

• Provide linearized thermocouple and

RTD temperature values

• Determine the width of input pulses

• Count pulses at frequencies up to 1000Hz

• Detect rising or falling edges

• Latch momentary input events

• Set the level of analog outputs

• Provide delayed-on or delayed-off outputs

Even while an Embedded Control Program

(ECP) is running on MicroDAC LT, any

Optomux

™

command it receives from the host

will be processed as usual, which allows you to

delegate some or all of the control and data

acquisition responsibility from the host computer.

This reduces communications time and

improves system response.

For embedded or stand-alone applications,

downloaded ECP routines can be initiated on

power-up.

Libraries and the appropriate download utility

are included with the ECP Programmers

Manual.

GENERAL DESCRIPTION

MicroDAC LT is a low cost version of MicroDAC

for customers who don't need all of the features

of MicroDAC. Missing are the battery back-up

for the RAM memory, real-time clock, RS-232,

and SBX ports. The DIN Rail Mountable metal

enclosure is optional. ECP routines written for

MicroDAC can be easily transferred to

MicroDAC LT and vice versa. By combining

MicroDAC, MicroDAC LT and ProMux the

cost/performance of a distributed control or

data acquisition network is optimized for price

and performance.

System 50

COMMUNICATIONS

The host computer and MicroDAC LT(s)

communicate serially over one or two pair of

twisted wires per RS-422/485 in a multi-drop

configuration. They use Optomux

™

ASCII

format to code the command and the response

messages. Application programs running on

the host computer issue commands and then

await responses from the MicroDAC. The

communications speed is selectable between

1.2 and 115.2 KBaud. Each controller on the

network is assigned a unique base address.

The entire network can span 4000 feet.

SOFTWARE

Software drivers are available which simplify

the task of interfacing host programs written in.

Visual Basic or C to the MicroDAC network.

Sample programs, set-up and debug utilities

are included on the disk with the drivers.

Interface drivers for most third party software

packages are available through their

distributors. Our MicroDAC DDE Server

dramatically simplifies data sharing between

MicroDACs and Windows applications, such

as Microsoft Excel (see Controller Software).

Our DLL will assist you in building custom

Windows Man-Machine Interfaces or control

programs using Visual Basic, Visual C/C

, or

Borland compilers.

ANALOG & DIGITAL I/O

MicroDAC LT connects directly to any 8,16,24,

or 32 module mounting rack with a 50-pin

header. If connected to a G5 rack, any

combination of analog and digital I/O modules

may be used. Standard and Mini racks permit

only a combination of digital modules. MicroDAC

LTs can be networked to a host PC which

execute programs that monitor the input signals

EMBEDDED CONTROL PROGRAMS

By specifying MicroDAC LT(s) with the optional

64KB of flash memory, you can develop and

download C language programs to any of the

networked controllers.

With optional enclosure.

System 50

Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com

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72-UMM-DLL概述

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