ProSoft Technology 5201-MNET-ASCII - Manual (Page 10)

Functional Overview MNET ♦ ProLinx Gateway
Driver Manual Modbus TCP/IP Interface Module
Page 10 of 78 ProSoft Technology, Inc.
September 1, 2010
1.1 Modbus TCP/IP (MNET) Port
The gateway supports a client connection on the TCP/IP network to interface
with processors (and other server based devices) using a user constructed
command list of up to 100 entries. The gateway’s internal database is used as
the source for write commands to the remote processors. Data collected from the
processors using read commands is placed in the gateway’s database.
Data in the gateway’s internal database is accessible for read and write
operations by any node on the network supporting the MBAP (Service Port 502)
or MNET (Service Ports 2000/2001) TCP/IP protocols. The MBAP protocol (Port
502) is a standard implementation defined by Schneider Automation and used on
their Quantum Processor. This open protocol is a modified version of the serial
Modbus protocol. The MNET protocol is an embedded Modbus protocol
message in a TCP/IP packet. The gateway supports up to five active server
connections on Service Ports 502, five additional active server connections on
Service Port 2000, and one active client connection.
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