Specifications

Hardware Description of LCN Node Processors – K4LCN-X Node Processor
12/01 Application ModuleX Service 25
Honeywell
Table 3-2 K4LCN Board Indicators
LED Description Suspected cause if abnormal
Self-Test Pass On after board passes self-test.
Normally on.
K4LCN
TX On when transmitting on the
LCN. Normally on or flashing
rapidly.
K4LCN
RST/PWR fail On when a reset operation
caused by the reset button or
power on is in progress.
Normally off.
K4LCN
Self-Test Error On to indicate a board self-test
error. Normally off.
K4LCN
Data Compare Error On to indicate an on-board data
compare error. Normally off.
K4LCN
DTAK Time Out On to indicate a Data Transfer
Acknowledge failure. Normally
off.
K4LCN
BGAK Time Out On to indicate a Bus Grant
Acknowledge failure. Normally
off.
K4LCN or other board(s) in
chassis
Data Parity Error On to indicate an on-board data
parity error. Normally off.
K4LCN
Bus Error On to indicate a detected
backplane bus parity error.
Normally off.
K4LCN, other board(s) in
chassis, or backplane
EDAC Single-Bit Error On to indicate a single-bit
(correctable) RAM error.
Normally off.
K4LCN
EDAC Multiple-Bit Error On to indicate a multiple-bit
(uncorrectable) RAM error.
Normally off.
K4LCN
LCN Transaction Error On to indicate communication
problems with the LCN. Normally
off.
K4LCN or CLCN A/B I/O
(LCNI/O)orLCNnetwork
Node Address/Error display This 3-digit display normally
displays the pinned LCN node
address. It will display error
codes for further problem
definition in error situations.
See Five/Ten-Slot Module
Service manual for multiple
possible causes. Reference
>>Alpha Numeric Displays in
Appendix A.