Specifications

Hardware Description of LCN Node Processors – HMPU Processor and Associated Boards
32 Application ModuleX Service 12/01
Honeywell
LLCN indicator
description
The following table gives a description of the indicators on the LLCN
board. Reference the preceding diagram.
Table 3-4 LLCN Indicators
LED Description Suspected cause if abnormal
Self-Test/Error On to indicate a board self-test
error. Normally off.
LLCN
Pass module test On after board passes self-test.
Normally on.
LLCN
Bus Trans Error On to indicate a detected
backplane bus parity error.
Normally off.
LLCN, other board(s) in chassis,
or backplane
Tx Transmission on LCN from this
board is taking place. Normally
on or blinking rapidly (on a
loaded node).
LLCN, HMPU, or LCN cable
problems.
QMEM-X board
This board is used to provide additional memory for the HMPU node
processor. The 4 megaword version is required in the A
X
M with R500. A
total of 6 megawords of node processor memory is required to support
R500 (HMPU=2 + QMEM-4 = 4).
The memory size of any QMEM can quickly be determined by looking at
the last digit of the name on the left board extraction lever.
Example:
Table 3-5 QMEM Memory Capacities
Board name Memory capacity
QMEM-2 2 Megawords
QMEM-3 3 Megawords
QMEM-4 4 Megawords