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