PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 2
GFK-2222AK October 2019
CPU Features & Specifications 41
2.3.1.4 Ethernet Ports
CPE100/CPE115 provides two independent Fast Ethernet LANs. LAN1 has only one port
and is dedicated to embedded Ethernet controller and whereas LAN2 is comprised of 3
switched ports configurable either as a second embedded Ethernet controller or as an
embedded PROFINET controller.
All the Ethernet ports of both the LAN1 and LAN2 are capable of automatically sensing the
link data rate (10 Mbps or 100 Mbps), communications mode (half-duplex or full-duplex),
and cabling arrangement (straight-through or crossover).
To establish Ethernet communications between the PME programming software and the
CPE100/CPE115, you first need to set a valid IP address.
Note:
• LAN2 will not be operational unless it is configured from the programmer with a valid IP
address.
• Care must be taken when assigning IP Addresses and subnet masks to each LAN so that an
overlapping IP subnet is not created. Intermittent or no Ethernet communication may result if an
overlapping IP subnet is created and the two interfaces are NOT connected (cabled) to the same
physical network.
• By default, PME prohibits configuring both LAN interfaces on an overlapping IP subnet. (This may
be changed by going to Controller General Options and changing the Multiple Embedded LANs
on Same Subnet to Show as Warning.)
The programming software ‘PAC Machine Edition’ uses SRTP (Service Request Transport
Protocol), a proprietary protocol used primarily for communication with the controllers.
The Ethernet port of LAN1 can be used to communicate with the PME software and is also
a recommended option. Alternatively, any port of LAN2 can also be used but first it
should be configured with a valid IP address. Ethernet ports of LAN2 can also be
configured to be used as either a second embedded Ethernet controller or as an
embedded Simplex PROFINET I/O Controller.
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