ProSoft Technology PLX3x Series, Руководство пользователя

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MBTCP Protocol PLX3x Series ♦ Multi-Protocol Gateways
User Manual
Page 96 of 215 ProSoft Technology, Inc.
January 25, 2018
6.1.1 MBTCP General Specifications
The Modbus TCP/IP protocol allows multiple independent, concurrent Ethernet
connections. The connections may be all clients, all servers, or a combination of
both client and server connections.

10/100 MB Ethernet Communication port

Supports Enron version of Modbus protocol for floating-point data
transactions

Configurable parameters for the client including a minimum response delay of
0 to 65535 ms and floating-point support

Supports five independent server connections for Service Port 502

Supports five independent server connections for Service Port 2000

All data mapping begins at Modbus register 400001, protocol base 0.

Error codes, network error counters, and port status data available in user
data memory
Modbus TCP/IP Client

Actively reads data from and writes data to Modbus TCP/IP devices using
MBAP

Up to 10 client connections with multiple commands to talk to multiple servers
Modbus TCP/IP Server

The server driver accepts incoming connections on Service Port 502 for
clients using Modbus TCP/IP MBAP messages and connections on Service
Port 2000 (or other Service Ports) for clients using Encapsulated Modbus
messages.

Supports multiple independent server connections for any combination of
Service Port 502 (MBAP) and Service Port 2000 (Encapsulated)

Up to 20 servers are supported