70M-OSW1 Grayhill, Inc, 70M-OSW1 Datasheet - Page 7

• Manufacturer Part Number: 70M-OSW1
• Description: Opendac I/o System Low Cost Remote I/o System
• Manufacturer: Grayhill, Inc

OpenDAC
NETWORK INTERFACES
OpenLT
FEATURES
• Each Unit Controls/Monitors up to 32
• Executes On-Board Programs Created
• Network up to 64 OpenLTs per Host Serial
• Communicate Over RS422 /485 at
• 100% Optomux Compatible, With
• I/O Update Rates of 500 µSec per 32
• 64-Bit Floating Point Math
• DIN Rail or Panel Mountable
• CE Certified
APPLICATIONS
GENERAL DESCRIPTION
The OpenLT
slave that responds to Optomux
from the master or host PC. The 72-OPT-4100
version has memory for Embedded Control
Programs (ECPs) which are control or data
acquisition routines which run locally on the
OpenLT
from the host. ECP routines written for MicroDAC
can be easily transferred to OpenLT
versa. By combining MicroDAC, OpenLT
ProMux
control or data acquisition network is optimized
for price and performance.
Analog and/or Digital I/O using OpenLine
Modules
With Borland C
Port, Spanning as Much as 4000 Feet
Speeds from 9600 Baud to 115.2 KB
Expanded Command Set
Digital I/O, and 2 mS per Analog Input
or 2 Analog Outputs
6
Distributed Processing: Remote I/O
Central Processing: Remote I/O
®
™
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: [phone] • Fax: [phone] • www.grayhill.com
the cost/performance of a distributed
and off-load some responsibilities
Stand Alone Control
™
Local Control & I/O
™
(Optomux)
Optomux
SCADA
RTU
™
controller is a remote
OpenDAC
™
commands
™
and vice
®
™
I/O System
and
ANALOG & DIGITAL I/O
OpenLT
OpenLine
Any combination of OpenLine
I/O modules may be used. OpenLTs
networked to a host PC which execute programs
that monitor the input signals and control the
outputs. In addition to simple ON/OFF
instructions, commands are included which
permit you to:
• Sample analog signals at 2 mS per input
• Flag values above or below prescribed levels
• Capture min/max values
• Calculate the average input signal levels
• Provide linearized thermocouple and
• 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
COMMUNICATIONS
The host computer and OpenLT(s)
communicate serially over one or two pair of
twisted wires per RS-422/485 in a multi-drop
configuration. They use Optomux
to code the command and the response
messages. Application programs running on
the host computer issue commands and then
await responses from the OpenLT
communications speed is selectable between
9.6 and 115.2 KBaud. Each controller on the
network is assigned a unique base address.
The entire network can span 4000 feet.
Diagnostic LEDs show traffic on the network.
RTD temperature values
®
®
®
connects directly to one or two
racks (part number 70LRCK16-48).
®
analog and digital
™
ASCII format
™
OPENLT
™
can be
. The
®
™
UNIT ON OPENDAC
EMBEDDED CONTROL PROGRAMS
By specifying OpenLT(s)
KB of flash memory, you can develop and
download C language programs to any of the
networked controllers.
Even while an ECP is running on OpenLT
Optomux
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.
SOFTWARE
Software drivers are available which simplify
the task of interfacing host programs written in
Visual Basic or C to the Optomux 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
Optomux DDE Server dramatically simplifies
data sharing between OpenLTs
applications, such as Microsoft EXCEL (see
Controller Software). Our DLL will assist you in
building custom Windows Man-Machine
Interfaces using Visual Basic, Visual C/C
Borland compilers.
™
command it receives from the host
®
SYSTEM
®
with the optional 64
™
and Windows
®
++
, any
, or