Appendix
9.6.5.3 NCM
S
WITCH
F
UNCTIONS
:
G
ROUND
F
AULT
D
ETECTION AND
L
INE
T
ERMINATION
The NCM-W provides two sets of switches to simplify network set-up. Default settings for AFP-2800 networks are
shown in the diagram below.
EF B
TERM B
EF A
TERM A
OFF
ON
SW 102
SW 103
SW 100
•
To enable ground fault detection, set SW103 for Channel A; SW101 for Channel B, to the ON position
•
To activate the on-board end-of-line resistors, set SW100 for Channel A; SW102 for Channel B, to the ON
position. There MUST be a functioning terminating resistor on the first and last node/repeater of a wire
segment (between 2 nodes). This means that in a ring configuration each NCM in the ring
MUST
have
terminating resistors enabled for both channels.
9.6.5.4 NCM
D
IAGNOSTIC
LED
I
NDICATORS
:
The NCM has LEDs that serve as diagnostic indicators to help in troubleshooting and system connection. The
table below outlines their function.
Diagnostic
LED detail
B HI
RCD B
STAT B
PULSE 1
POWER
LED Description
Illuminates to indicate that the NCM-W Port A is set for high threshold
Illuminates to indicate that the NCM-W Port B is set for high threshold
Illuminates when the NCM is receiving data from the network on Port A
Illuminates when the NCM is receiving data from the network on Port B
Illuminates when the NCM has not received valid data on Port A for at least
16 seconds
Illuminates when the NCM has not received valid data on Port B for at least
16 seconds
Illuminates when a reconfiguration on the network is in progress
Illuminates when the NCM is transmitting data to the network
Illuminates when the microcontroller fails
Illuminates when +5VDC is available
AFP-2800/2802 Manual
– P/N DOC-01-011
124
OFF
ON
SW 101
SETUP
SWITCH
DETAIL
A HI
RCD A
STAT A
RECON
RESET
LED Indicator
LED Colour
A HI
Green
B HI
Green
RCD A
Green
RCD B
Green
STAT A
Yellow
STAT B
Yellow
RECON
Yellow
PULSE1
Green
RESET
Yellow
POWER
Green
Содержание AFP-2800
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