Edwards nEXT730D Instruction Manual page 91

Turbomolecular pumps
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The service status word is made up of 8 hexidecimal digits. To decode this word, convert
each digit into a 4-digit binary number in the same manner as the system status word,
which is described in
Each binary digit (bit) represents a flag that is either active (state 1) or not active (state
0). To help decode the service status word, each bit is numbered (starting with 0 for the
least significant to 31 for the most significant) as shown in
on page 102. The meaning of each bit in the service status word is given in
service codes
Table 24 Service flags
Bit number
0
1
2
3
4
5
6
7
8
9
10
11
12
B8J200880_D
300812671_002_C3
B8J200880_D - Maintenance
=
v
8
8
1
Decoding system status words
on page 100.
Status flag
Reserved
Bearing service due
Pump service due
Controller service due
Reserved
Reserved
Reserved
Service due
Bearing conditioning re-
quired flag
Bearing replace re-
quired flag
Bearing conditioning re-
quired
BR required
Bearing conditioning
running
Page 91
sp
h
h
h
h
on page 102.
Decoding system status words
Active flag means
-
Set when hours until bearing service due = 0
or bearing replace required due to inactivity
per bit 9 below
Set when hours until pump service due = 0
or cycles until pump service due = 0
Set when hours until controller service due =
0
-
-
-
Service is due, or underway per bit 12 below.
Specific operation required should be deter-
mined by checking the bits above, and 10
and 11 below
Set on exceeding Bearing Run In Mode
(BRIM) inactive period, typically 1 year.
Cleared on full BRIM completion, provided
no step forward, or these three conditions:
1) TMP start while bit 8 or 9 set, but without
full BRIM enabled.
2) BRIM disable while bit 8 or 9 set, whether
or not BRIM underway.
3) TMP stop while BRIM underway.
Set on exceeding Bearing Replace (BR) inac-
tive period, typically 3 years. Cleared on BR
confirm.
Per bit 8, but suppressed if bit 11 or 12 set
Per bit 9, but suppressed if bit 12 set
Set if Bearing conditioning is presently run-
ning, from start to Post Ramp (PR) com-
mence
h
h
h
h
cr
Flashing
08/2021 - ©Edwards Limited

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