Lan Interface Status (Lis) Bits - GE RX3i User Manual

Chapter 12. Diagnostics

LAN Interface Status (LIS) Bits

The LAN Interface Status bits monitor the health of the Ethernet Interface.
Bit 1, Port 1A Full-duplex (Rack-based and RX7i Embedded)
Port Full-duplex (RX3i Embedded)
This bit is set to 1 when the port is set to full-duplex. Full-duplex or half-duplex operation is automatically
negotiated between the Ethernet Interface and its immediately-connected network device, usually a network
hub or switch. If this bit is 0, the port is in half-duplex Ethernet mode. This bit is only valid if bit 13 (LAN OK) is 1.
Bit 2, Port 1A 100Mbps (Rack-based and RX7i Embedded)
Port Operating at Highest Supported Speed (RX3i Embedded)
This bit is set to 1 when the port is operating at its highest supported speed.
Bit 3, Port 1B Full-duplex (Rack-based and RX7i Embedded)
This bit is set to 1 when Port 1B is set to full-duplex. Full-duplex or half-duplex operation is automatically
negotiated between the Ethernet Interface and its immediately-connected network device, usually a network
hub or switch. If this bit is 0, the port is operating in half-duplex Ethernet mode. This bit is only valid if bit 13 (LAN
OK) is 1.
Bit 4, Port 1B 100Mbps (Rack-based and RX7i Embedded)
This bit is set to 1 when Port 1B is operating at 100Mbps.
Bit 5, Network Time Locked (Rack-based and RX7i Embedded)
The Ethernet clock is locked to a network SNTP timer server. When this bit is 0, the Ethernet module has lost its
lock to a network timeserver, or was never locked to a timeserver. This bit is updated whether or not the SNTP
Time Transfer feature is configured and whether or not the logic application has enabled CPU Time Update
interrupts. For more information, see "Timestamping of Ethernet Global Data Exchanges" in Chapter 5.
Bit 6, Redundant IP Address Active (Rack-based and RX7i Embedded)
This bit is set to 1 when the configured Redundant IP address is active. Otherwise this status bit is set to 0.
Bit 9, Any Channel Error (All models)
This bit (normally 0) indicates one or more of the channels are in error.
Bit 13, LAN OK (All models)
This bit is 1 as long as the Ethernet Interface software is able to communicate on the network. If the network
becomes inaccessible due to local or network problems, this bit is set to 0. If LAN communication becomes
possible again, it is set to 1.
Bit 14, Resource Problem (All models)
This bit is set to 1 if the Ethernet Interface software has a resource problem (i.e., lack of data memory). The bit is
reset to 0 on a subsequent PLC sweep. The Ethernet Interface may or may not be able to continue functioning,
depending on the severity of the problem. Look in the Controller Fault Table for details. In addition, the Station
Manager STAT B and LOG commands can be used. See the Station Manager Manual, GFK-2225, for more
information.
Bit 15, Module Over-Temperature (RX3i Rack-Based)
This bit is set if the Ethernet interface hardware has detected that the internal temperature has exceeded
normal limits. The bit is cleared when the internal temperature has not exceeded normal limits, or has
recovered from an over-temperature condition. (Overtemperature indication is available only in the RX3i rack-
based Ethernet interface.)
Bit 16, LAN Interface OK Bit (All models)
This bit is set to 1 by the Ethernet Interface each PLC scan. If the Ethernet Interface cannot access the PLC, the
CPU sets this bit to 0. When this bit is 0, all other Ethernet Interface Status bits are invalid.
GFK-2224Q January 2017 217