NET Concentrator System
®
NCS
- 8 -
Moore Industries-International, Inc.
www.miinet.com
EMM Interface Module
The Ethernet and MODBUS Interface Module (EMM)
provides both MODBUS/TCP and RTU interfaces. It
replaces the legacy EIM and MIM Interface Modules,
combining the functionality of both EIM and MIM. It
also provides additional features such as acting as a
MODBUS master.
Simultaneous Dual MODBUS RTU and
Ethernet Communications
The
Interface Module
communicates data using dual
MODBUS RTU data links and standard Ethernet.
Dual MODBUS RTU Networks
—When the
Interface Module
uses MODBUS RTU for
communications, each of its two MODBUS ports
can be set up as a master or as a slave. The ports
can also be set up identically to provide network
redundancy. Up to 64 (32 per MODBUS port)
NCS
stations and/or third-party MODBUS devices can be
distributed throughout a plant multidropped on the
dual MODBUS RS-485 data links (without repeaters).
Depending on the type of expansion I/O modules
used, a station can accommodate just a few or as
many as 128 points when using expansion I/O. With
repeaters, additional
Interface Module
stations and
MODBUS devices can be added to a system.
Ethernet (IEEE 802.3) Communications
—The
number of
Interface Module
stations that can be used
on an Ethernet (MODBUS/TCP) network is limited
only by the architecture of a specific network (taking
into account the physical limitations of Ethernet).
Standard industrial Ethernet switches or hubs are
available to interconnect large numbers of
Interface
Module
stations. Ethernet switches also minimize
message collisions, improving determinism in the
Ethernet network
.
Data Logger
A user-configurable data logger stores up to 64,000
total samples in a circular First In, First Out (FIFO)
buffer in RAM. The most recent 18,000 samples
are stored in battery-backed RAM. The data log
is accessible as a .csv file (Microsoft
®
Excel
®
compatible) via the Ethernet interface.
I/O Modules
The EMM Interface Module integrates with any of the
NET Concentrator System’s analog, temperature,
discrete and relay I/O modules. Using just one
Interface Module with I/O modules, up to 128 signal
inputs and outputs can be transmitted long distances
on one low cost data link.
Configuration
The EMM stores web browser-based software
internally which is used to configure and retrieve
information for the NCS station. Operating parameters
can be changed over the intranet (or internet) from
any PC, with proper security password clearance. The
NCS station can also be set up using Intelligent PC
Configuration Software.
Transition from Legacy
NCS Devices
The EMM replaces the EIM (Ethernet Interface
Module) and MIM (MODBUS Interface Module). There
are a few minor differences to note which are detailed
in Appendix A.
Содержание NET Concentrator System AOM
Страница 33: ...NET Concentrator System NCS 33 Moore Industries International Inc www miinet com NCS as MODBUS Slave...
Страница 36: ...NET Concentrator System NCS 36 Moore Industries International Inc www miinet com NCS as MODBUS Master...
Страница 92: ...NET Concentrator System NCS 92 Moore Industries International Inc www miinet com Appendix B MODBUS Registers...