Gasboy CFN Series Diagnostic Manual - Manual (Page 52)

GASBOY CFN Series
2-26 0021
Terminal communications are down. The system is working.
Possible Cause Checks Corrective Action
Terminal turned off. Check terminal power
indicator. Turn on, if off.
Terminal offline. Check ON LINE indicator Put online if offline.
Cable disconnected. Check connections. Re-connect cable if not
connected or loose
Incorrect terminal set-up. Check the terminal set-up
parameters. If a CRT, the
terminal should be set for
VT52 emulation, 8 data bits,
no parity, 1 stop bit. The
baud rate should match the
site controller's baud rate. Configure the proper set-up
parameters according to the
terminal manufacturer's
instructions.
Defective power supply. Measure the voltages
between the black (DC
ground) and red (+12VDC),
and black and white (-12VDC)
wires at connector P8 on the
site controller CPU board. Replace the power supply if
the proper voltages are not
measured at P8
Incorrect baud rate switch
settings on the site controller
CPU board. Check that the baud rate
settings on SW3 are correct. If baud rate switches are
wrong, correct the settings
and press reset switch SW1.
Incorrect jumper settings on
the site controller CPU board.
(Remote port) Check the K1 jumper patch
on the site controller CPU
board. Remove all jumpers from K1,
if any.
Incorrect configuration of
remote port. Check the configuration at
Table 17, offset 23. If you are using a terminal to
communicate to the site
controller's remote port, the
configuration at Table 17,
offset 23, should be 80. If it is
not, you can only change the
configuration through the local
port.
(Continued)