Moore Industries NET Concentrator System AOM, Руководство пользователя

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NET Concentrator System
®
NCS
- 6 -
Moore Industries-International, Inc.
www.miinet.com
NCS Concentrator System
Architectures
NET Concentrator System networks are made up of
one or more stand-alone stations consisting of one
Interface Module, combined with Input and/or Output
modules. The NCS will work in both
Peer-to-Host
Systems acting as a Slave or Master and in
Peer-to-Peer Systems . Each port of the Interface
Module can be configured independently to allow
multiple network architectures.
Peer-to-Host Systems
(NCS as MODBUS Slave)
Peer-to-Host systems provide a cost-effective method
to transfer monitoring and control signals to and
from a host DCS-, PLC- or PC-based system. In
this architecture, NET Concentrator System stations
are distributed along an Ethernet (MODBUS/TCP)
or MODBUS RTU serial network. Once the data
is delivered to the host system, third-party HMI or
SCADA software packages can be used to create user
interface strategies that may include data acquisition,
alarm summary and management, data logging and
reporting, historical data collection and trending, and
supervisory control functions.
Peer-to-Host Systems
(NCS as MODBUS Master)
One or both of the MODBUS RTU ports can be
configured as MODBUS master ports. This allows the
NCS to poll other MODBUS RTU slaves with all of the
network polling functions of a typical MODBUS master.
This mode is not available on the MODBUS/TCP port.
Peer-to-Peer Systems
(NCS as MODBUS Peer)
In this architecture, NCS stations are used to
“concentrate” analog and discrete monitoring
and control signals onto a digital data link. This
dramatically reduces the cost of transmitting multiple
signals long distances by eliminating the need for
costly point-to-point wiring.
Note:
MODBUS RTU Peer-to-Peer Systems can be
configured using NCS Config software.
Peer-to-Peer Systems using the MODBUS/TCP
(Ethernet) port require ICS Triplex ISaGRAF control
software (available from Moore Industries).
Matching Pairs*—NCS Peer-to-Peer Systems are
typically comprised of NCS station pairs, with the
signals from an Input Module within a station sending
signals to an Output Module within another station
(such as one on the opposite side of the data link).
Free Channel Mapping*—
Alternatively, each NCS
input/output channel in a Peer-to-Peer System can
be mapped (assigned) to any other channel within a
system.
Send One Signal to Multiple Locations*—
One
channel can also be assigned to any number of other
channels should multiple identical representations
of an input or output signal be required at different
locations.
Peer-to-Peer mode may be used on a single port,
leaving the other free for operation in Master or Slave
mode. Using both ports for Peer-to-Peer allows a
failover mechanism to be used which provides for
network redundancy. For more information on each
mode please see the relevant sections later in this
manual.
* Ethernet Peer-to-Peer Systems are accomplished using the EMM Interface Module
combined with ICS Triplex ISaGRAF control software (available from Moore Industries).
MODBUS RTU Peer-to-Peer Systems are configured via the EMM Interface Module internal
Internet Explorer Web browser or using the Moore Industries software package called NCS
Config.