Toshiba T300MVi - Manual (Page 14)

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1. Introduction
The TOSVERT-300MVi Multiprotocol Ethernet and Modbus RTU Interface
allows information to be transferred seamlessly between the drive and various
fieldbus networks with minimal configuration requirements. In addition to the
connection to the ASD, the unit provides a 10/100BaseT Ethernet port, one
RS485 port, and one RS232 port. These various communication ports operate
independently, and are configurable along with the unit’s internal point
database via a standard web browser.
The unit currently provides support for the following popular protocols:
 Modbus RTU (RS485 master & slave)
 Modbus RTU (RS232 master & slave)
 Modbus TCP/IP (slave)
 Ethernet/IP (server)
Before using the Multiprotocol Ethernet and Modbus RTU Interface, please
familiarize yourself with the product and be sure to thoroughly read the
instructions and precautions contained in this manual. In addition, please make
sure that this instruction manual is delivered to the end user of the interface,
and keep this instruction manual in a safe place for future reference or unit
inspection.
The TOSVERT-300MVi Multiprotocol Ethernet and Modbus RTU Interface
provides simultaneous support for many different communication protocols,
allowing complex interchanges of data between otherwise incompatible
networks. At the heart of the interface is an element called the “point
database”. The point database is entirely user-configurable, and provides the
mapping information that allows requests from the various supported networks
to be interpreted and stored in a common format. This allows data to be routed
from any supported network to any other supported network.
Although the interface is hosted by and always in communication with the
TOSVERT-300MVi drive into which it is installed, from a programming
perspective the drive is just another “network” with which the interface board
can communicate, and its configuration is therefore treated as such. Although
this may appear unusual at first glance, maintaining this paradigm provides the
benefit of uniform overall configuration and therefore comprehension of the
entire network architecture. This advantage will especially become apparent
when more than one network is simultaneously connected to the interface.
In addition to the point database’s mapping capabilities, it also provides the
added benefit of “data mirroring”, whereby current copies of point values
(populated by a “source port” designation) are maintained locally within the
interface itself. This greatly reduces the request-to-response latency times on
the various networks, as requests (read or write) can be entirely serviced