Schneider Electric Processor Adapter - Manual (Page 145)

Using the Ethernet Port
870 USE 101 10 V..2 145
Network Design Considerations, Continued
I/O Networks In an Ethernet I/O network architecture, an M1 Processor Adapter is used to control
Momentum I/O points equipped with an Ethernet Communication Adapter or other
Modbus over TCP/IP Ethernet-aware devices. Communication between these
devices should be isolated not only from MIS data traffic, but also from unrelated
communication between other control devices.
You may isolate communication by creating a separate network or by using
switches.
Supervisory
Networks In a supervisory architecture, several intelligent processing devices share system
data with each other. Many kinds of devices may be part of the network. You should
be aware of each device’s requirement for access to the network and of the impact
each device will have on the timing of your network communication.
Combined
Supervisory and
I/O Handling If your system requires both supervisory and I/O handling architectures, one
solution is to use the I/OBus capabilities of the 171 CCC 960 20 Processor Adapter
for the I/O network and the Ethernet capabilities for the supervisory network.
If you intend to use Ethernet to handle both functions, use switches to isolate the
network traffic and supply additional buffering of network packets.
Concurrent
Communication A maximum of 96 devices may be communicating with the Processor Adapter via
the Ethernet at any one time. This 96-device limit consists of:
l
up to 2 programming panels (one must be in monitor mode)
l up to 14 general purpose Modbus server paths
l up to 16 MSTR elements which support Modbus read, write or read/write
commands
l up to 64 cyclic configured data slave paths
Continued on next page