Virginia Controls, LLC
MH-3000 User Manual, 1_03C10-VC
Page 36
boards, improper addressing of the I/O board(s) (see the section on I/O board
addressing), or incorrect setting of the number of I/O boards in the CPU (see the
section on adjustable settings). Refer to the section on I/O Boards for a description
of the communication Status LED on the I/O Board.
On Duplex or Group systems, the LED also monitors the communication with the
other CPU. It will flash if the communication with the other car(s) is operating
normally. If the LED stays off, then the communication has failed (see the section
under Duplexing, Communication). If the LED stays on, then either the Group
communication has failed, or the communication to the I/O boards has failed, as
described above. Check the LEDs on the I/O boards to determine if they are
communicating properly, then check the BADCOMM address as described in the
Duplex Communication section.
D5 "Watchdog". This LED will flash regularly (about once per second) if the CPU is
operating properly. NOTE: The LED will flash every 10 seconds if the car is not in
the run mode. If the LED stops flashing, reset the CPU by cycling the Main Line
Disconnect Switch, or pressing the Reset Button on the CPU.
NOTE: If the diagnostic mode is changed to monitor the Internal Memory, or
the Setup Mode is selected, then the operation of the LEDs will change, as
described in the appropriate sections.
5.5.1.3
Reset Button
The Reset Button is located just
below the LCD Display.
It is used to reset the CPU if a lock-
up occurs (such as if LED D5 stops
flashing when in the normal operating
mode).
Pressing this Reset Button is
NOT the same as doing a factory
reset.
The Reset Button restarts the CPU
just as if the power had been cycled;
whereas a factory reset will reset the
settings and features to the factory
default values.
WARNING: Pressing the Reset Button will reset the CPU, causing all
outputs to be turned off and the car to stop immediately.
NOTE: The Reset Button should not normally need to be used.