Specifications

3/96 Application Module
X
Service 13
Honeywell Inc.
Section 3—Hardware Description of LCN Node Processors
3.1 K2LCN-X Node Processor
Overview
The K2LCN processor board contains all of the essential parts to make up
the kernel portion of any LCN node. It includes a 68020 processor, LCN
interface circuits, and 4-8 megawords of onboard memory (for A
X
M). It
does not have floating point calculation hardware capability. The exact
memory size is determined by which option is purchased. A minimum of 4
Megawords are required to support R431.
Changing memory size requires the replacement of the current K2LCN
board with a board containing the proper memory complement. This board
cannot be upgraded in the field.
The K2LCN board memory size is easily recognized by the -X portion of
the name on the left extraction lever; i.e., K2LCN-4 = 4 megawords,
K2LCN-8 = 8 megawords, etc.
K2LCN indicators
The K2LCN board indicators are visible from the free edge of the board
while it is installed in a chassis. They provide visual indications regarding
the existing conditions on the board.
An indicator diagram follows.
The K2LCN indicators are shown in the diagram.
Self-Test
Error
Self-Test
Pass
(Green)
RST/PWR
Fail
Data
Compare
Error
DTAK
Time
Out
BGAK
Time
Out
Data
Parity
Error
Bus
Error
Node
Address/Error
Display
EDAC
Single-Bit
Error
EDAC
Multi-Bit
Error
LCN
Transaction
Error
40022
Red LEDs
TX
(Yellow)