Rosemount TankRadar Rex DAU 2100, Руководство по обслуживанию

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Rosemount Tank Radar Rex
Chapter 4 Service
4-46
Service Manual
308012En, Ed.2
May 2013
4.2.6 Electronics
The main board of the Field Communication Unit is the FCP-board (Field
Communication Processor). See Figure 4-19 and Figure 4-21.
There are a number of LEDs on the FCP board. There are green LEDs
for incoming signals and yellow LEDs for outgoing signals. There is a red
LED indicating watch dog time out and CPU reset. When the watchdog
LED is lit, it indicates that the CPU has been reset due to a watchdog
time-out and not a dip in the supply voltage. There is a green LED to
indicate that there is power on the FCU.
Figure 4-19. LEDs on the FCP board in the FCU
Table 4-2: Summary of LED indications
Serial
communication
port
Group
Bus 1
Group
Bus 2
Field
Bus 1
Field
Bus 2
Field
Bus 3
Field
Bus 4
Green LED
Serial data
received
H1 H3 H5 H7 H9 H11
Yellow LED
Serial Data
transmitted
H2 H4 H6 H8 H10 H12
Red LED Watchdog time
out/CPU reset
H13
Green LED Power on H14
Field
Bus
Group
Bus
H14 Power H13 Watchdog