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Technical Product Manual - DCT1900
Maintenance, Test and Maintenance Software
Maint-DCT1900/R8/mw 2-9
© 2000-2005
Relative Counters
A relative counter counts all resets since the power–on. The counter is cleared each time the
power is cycled or at a CPU reset (button or watch–dog). Relative counters have a threshold level.
When the threshold level is exceeded, a general alarm with fault code 3 is generated. Relative
counter values are halved every 24 hours.
Counters for CPU
The CPU board has the following counters for CPU circuits:
Absolute Counters:
Power On reset : increments at every power on.
Watch–dog reset : increments at every unexpected CPU watch–dog reset.
Relative Counters:
HSCX reset : increments at every HSCX reset.
HDLC A reset : increments at every HDLC A reset.
HDLC B reset : increments at every HDLC B reset.
8031 (BC) reset : increments at every 8031 reset.
Note:
HSCX = High Level Serial Controller Extended
HDLC = High Level Digital Link Control
Counters for Board Controllers
The CPU has the following counters for Board Controllers:
Absolute Counter : increments on all type of resets, see Table 2–1.
Relative Counter : increments at error (T&M reset/BC), increments at board insertion
(backplane reset).
Counters for Peripherals
The CPU has the following counters for peripherals:
Relative Counter : increments at error (T&M reset/P).