Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 110)

Troubleshooting
03/07/03 6-25 25
AUXILIARY PORT COMMUNICATION PROBLEM
Unable to communicate to the tank monitor through the Series 1000. The Series 1000
communicates with its two main communication ports and accepts cards, keys, or keypad
input for fueling.
Possible Cause Checks Corrective Action
No AC power to tank monitor. Is tank monitor AC power
switch off?
Is tank monitor breaker off?
Is 115VAC measured out of
breaker?
Is 115VAC measured at power
input terminal block of tank
monitor?
Turn on, if off
Turn breaker on, if off.
Replace breaker if 115VAC is
not measured.
Repair wiring if 115VAC is not
measured.
Communication unplugged or
bad connection at tank
monitor. Verify good connection of
communication cable to tank
monitor. Make good connection if poor
connection exists.
Incorrect baud rates. Verify that the baud rate of the
tank monitor is equal to the
port 1 baud rate selected on
the Auxiliary Communication
Port PCB.
Verify that the MPU PCB
communication port (1 or 2)
and its data terminal being
used to access the tank
monitor have a baud rate
equal or greater than the one
selected in the tank monitor
and Auxiliary Communication
Port PCB.
Make the appropriate change
if the baud rates are not equal.
NOTE: The tank monitor baud
rate should not exceed 1200
baud.
Make the appropriate baud
rate changes on the selected
equipment if the polling port
baud rate is not equal or
greater to the tank monitor
baud rate.
Auxiliary Communication Port
PCB communication cable
plugged into the wrong
communication connector. Locate port 1 on the Auxiliary
Communication Port PCB and
determine the connector to
which the communication
cable is attached. The upper
connector is RS-422; the lower
connector is RS-232. Verify that the communication
cable is connected to the
appropriate communication
connector.
(Continued)