有力的说明：
Ethernet
Ethernet is the most recent Modicon network supported by new Schneider Automation products like
Quantum PLCs. The communication protocol is based on the standard TCP/IP protocol with Modbus
messages embedded in the standard PDU messages. Ethernet operates at 10 Mbits/sec and supports
both solicited and unsolicited communications. The message structure used by Ethernet communications
is almost identical to the Modbus message structure with the exception of the destination node address
(which is a standard IP address).
The MBX driver products (MBX Driver, Remote MBX Driver, Ethernet MBX Driver) provide consistent
support for all of the above networks through an identical software architecture. The MBX Driver provides
driver support for all Modbus Plus host interface adapters from Modicon. This includes adapter cards like
SA85, AT984, SM85, MC984, PCMCIA 416NHM21200/3, TSXMBP100, and PCI-85.