Digital Equipment DECmpp 12000/Sx 100, Руководство по обслуживанию оборудования

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2.3 Indicators
2.3 Indicators
The DPU has indicators on the front panel, the ACU PCB, the MVIB Front-end
VME interface PCB (T6000), the PVME PVB, the PE array PCBs, the router
PCBs, and on the power tray. All of these indicators provide information about
the status of the system.
2.3.1 Front Panel Indicators
The DPU has 10 active indicators on the front panel, providing information about
the state of the DPU (Figure 2–1 or Figure 2–2). Most of these are two-color
indicators; they are either green, yellow, or off.
The front panel indicators are arranged in two banks of 10 indicators each.
Table 2–1 lists the front panel indicators, starting from the left.
Table 2–1 Front Panel Indicators
Label Green Yellow Off
Power Power, fan, and
temperature are OK System powering up
1
No AC power
present
19 System run light:
instructions are executing Macrocode is not running Not used
18 ACU is waiting for
TOBEQ Not used ACU is not waiting
for TOBEQ
17 ACU is waiting for
FRBEQ Page fault (overrides
green) ACU is not waiting
for FRBEQ
16 PMem is using PE PMem is not using PE
15 Router is active Not used No router activity
14 I/O is taking place
between PEs and I/O
devices Machine is temporarily
stalled due to register
interlock One or more PEs are
selected.
13 VME
AS
is active Not used VME
AS
is not
active
12 VME
DT ACK
is active Not used VME
DT ACK
is not
active
11 Not used VME parity error VME parity OK
10 Not used Normally always on Not used
9-0
2 3
Not used Not used Not used
1
During normal system powerup, the power status indicator is yellow for a few seconds, then changes
to green. If it remains yellow, the power sequencer did not complete powerup, and the power tray
indicators indicate the reason for failure. When the power sequencer stops trying to power up the
DPU, this indicator turns red.
2
Indicators 0-4 cycle when the software daemon is running.
3
Indicator 5 may become yellow if the background diagnostic tests fail.
2.3.2 Service Indicators
Service indicators include those on the various PCBs and on the power tray.
Figure 2–4 shows the location of the power tray service indicators. Figure 2–5
shows the location of the PCB service indicators.
DPU Controls and Indicators 2–7