Delta RMC151 - Manual (Page 426)

RMC70/150 and RMCTools User Manual
6.8.1. Ethernet Communications Overview
The RMC75E and RMC150E provide Ethernet slave communications, supporting 10 and
100Mb/s, full- and half-duplex with auto-negotiation. The RMC performs as a slave, requiring a
master to control it. The RMCs support up to 64 simultaneous TCP connections. This means
that up to 64 devices can communicate with the RMC at the same time, using any of the
supported protocols listed below.
Using Ethernet Communications
The RMC Ethernet port is used to communicate with other Ethernet devices, including
PLCs, HMIs, and PCs. This port can be used in several ways, as outlined below:
Communicating from RMCTools
RMCTools can communicate directly with the RMC over Ethernet. This connection provides
the fastest update rate for registers and plots in RMCTools. Ethernet also provides the
ability of remotely connecting to an RMC. See the Using Ethernet with RMCTools topic for
details.
Note: When you first set up the controller, it is easier to use the USB port for communicating
with the RMC from RMCTools than Ethernet because USB does not require setting up an IP
address.
RMCTools uses port 44818. If your PC has a firewall, make sure it allows connections to
port 44818. If the RMC is behind a firewall, make sure the firewall forwards port 44818 to
the RMC’s IP address.
Communicating from PLCs, HMIs, and Other Devices
Communicating with the RMC75E and RMC150E from PLCs, HMIs, or other master
Ethernet controllers can be done in one of several methods:
• PLC Ethernet Emulation
The RMC responds to several common industrial Ethernet protocols and can
emulate, or act like, several common PLCs. If your device supports reading and
writing to registers in any of these PLCs, then your device should be able to
communicate with the RMC. See Using the RMC’s PLC Ethernet Emulation for
details.
• Standard Industrial Ethernet Protocols
The RMC75E and RMC150E controllers support several common industrial Ethernet
protocols, including Modbus/TCP, PROFINET and EtherNet/IP. If your device can
make requests in any of the RMC’s supported industrial Ethernet protocols, then it
can likely communicate with the RMC. See the Supported Ethernet Protocols
section below for details.
• ActiveX Control or .NET Assembly
Applications that are running on a Windows PC and that support ActiveX Controls,
.NET Assemblies, or Microsoft Component Object Model (COM) can use Delta’s
RMCLink ActiveX Control and .NET Assembly. See the RMCLink topic for details.
• Direct over TCP or UDP
Third-party or custom controllers that do not support any of the above three
methods but can send and receive either TCP or UDP packets directly can
communicate with the RMC by manually building and parsing packets over TCP or
UDP. See the Communicating Directly over TCP and Communicating Directly over
UDP topics for details.
If your PLC, HMI or other device does not support any of the above methods, please
contact a Delta Computer Systems sales engineer to discuss your device. Delta strives to
406 Delta Computer Systems, Inc.