GE PACSystems RX7i Reference Manual page 54

Ethernet Ports CPE400
CPE400 supports a total of four independent 10/100/1000 Ethernet Local Area Networks (LANs).
•
LAN1 connects to the uppermost faceplate RJ45 connector (Figure 2). It is not switched.
•
LAN2 connects to the next two lower faceplate RJ45 connectors (Figure 2). These two
connectors are switched internally. If desired, one or both of these ports may be configured as
the Embedded PROFINET port.
•
LAN3 connects to the two lowest faceplate RJ45 connectors (Figure 2). These two connectors
are also switched internally. LAN3 may only be used in Redundancy applications. See Section
2.2.1.10, Hot Standby Redundancy.
•
The fourth LAN is marked EFA (Embedded Field Agent) and is located on the underside of the
equipment (Figure 3). It supports the Field Agent function and may not be used as a standard
Ethernet port. Refer to Section 2.2.1.9, Field Agent, below.
Each of the embedded Ethernet interfaces automatically senses the data rate (10 Mbps or 100 Mbps or
1 Gbps), communications mode (half-duplex or full-duplex), and cabling arrangement (straight-through
or crossover) of the attached link.
For improved performance, the LAN1, LAN2 and LAN3 are serviced by a dedicated microprocessor core.
In this way, the servicing of the Ethernet ports is independent of the controller logic, I/O scanning and
Field Agent activities. The EFA port is independently serviced by two of the four microprocessor cores.
This superior level of servicing is required at the higher communications rates.
LAN1 and LAN2 may be used to communicate with the PME programming software using the Service
Request Transport Protocol (SRTP, a proprietary GE protocol, used primarily for communication with the
programmer). The EFA port cannot be used for this purpose.
LAN2 may be configured as an embedded PROFINET Controller, as discussed in Section 2.1.6. While
configured as a PROFINET Controller, LAN2 may concurrently be used for Ethernet protocols. This topic
is discussed in the PACSystems RX3i PROFINET IO Controller User Manual, GFK-2571F or later.
LAN2 and LAN3 each support a pair of RJ45 connectors. In this way, network devices on the same LAN,
but operating at different data rates may be connected to a suitably configured port.
To establish Ethernet communications between the PME programming and configuration software and
the CPU, you first need to know the target IP address. Use the OLED menu function to check
the IP Address. For default IP Address and other details, refer to Establishing Initial Ethernet
Communications, Section 3.4.1.
CAT 5 cables (or superior) are required for proper operation with 100/1000BaseT LANs. The pin
arrangements are:
Pin
1
2
3
4
5
6
7
8
GFK-2222AD
Name 10/100BASE-T
TxD+
TxD-
RxD+
NC
NC
RxD-
NC
NC
April 2018
Chapter 2. CPU Features & Specifications
Name 1000BASE-T
LP_DA+
LP_DA-
LP_DB+
LP_DC+
LP_DC-
LP_DB-
LP_DD+
LP_DD-
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