GE GFK-1541B manual LAN Interface Status LIS Bits, Status Bits Brief Description

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LAN Interface Status (LIS) Bits

The status bits normally occupy a single block of memory. The location of this block is specified during configuration of the Ethernet Interface. The first 16 bits of the block (see Table 5-3) are the LAN Interface Status (LIS) bits. The next 64 bits are the Channel Status bits (2 for each channel).

Status Bits	Brief Description
1	Port 1 full duplex
2	Port 1 100Mbps
3	Port 2 full duplex
4	Port 2 100 Mbps
5-6	Reserved
7	RS-485 port fuse blown
8	AAUI (90-30) or AUI/BNC (90-70) fuse blown
9	Any SRTP Channel Error (error on any
	channel)
10–12	Reserved
13	LAN OK
14	Resource problem
15	Reserved
16	LAN Interface OK
17	Data Transfer - Channel 1
18	Channel Error - Channel 1
...	...
47	Data Transfer - Channel 16
48	Channel Error - Channel 16
49	Data Transfer - Channel 17 (90-70 only)
50	Channel Error - Channel 17 (90-70 only)
...	...
79	Data Transfer - Channel 32 (90-70 only)
80	Channel Error - Channel 32 (90-70 only)

For Series 90-30 PLCs, bits 49-80 are reserved for future use.

Unless the “LAN Interface OK” bit is set (Status Bit 16), the other status bits are invalid.

(Status Bit 1) Port 1 Full Duplex: This bit is set to 1 when Port 1 (or the only port on a module that does not incorporate a embedded switch) is set to full duplex. [Not implemented on the CMM321].

(Status Bit 2) Port 1 100Mbps: This bit is set to 1 when Port 1 (or the only port on a module that does not incorporate a embedded switch) is operating at 100Mbps.

(Status Bit 3) Port 2 Full Duplex: This bit is set to 1 when Port 2 is set to full duplex.

(Status Bit 4) Port 2 100Mbps: This bit is set to 1 when Port 2 is operating at 100Mbps.

GFK-1541B Chapter 3 Programming Channel Commands 3-33