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B8J200880_E - Fault finding
Page 117
Hexadecimal
Binary
Decimal
C
1100
12
D
1101
13
E
1110
14
F
1111
15
Each binary digit (bit) represents a flag that is either active (state 1) or
not active (state 0). To help decode the System Status Word, each bit is numbered
(starting with 0 for the least significant to 31 for the most significant) as shown below.
contains a list of the lower 16 status flags that will be useful for fault finding. The upper
16 status flags are reserved by us.
Binary digits
0
0
1
0
0
0
1
0
1
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
9
8
7
6
5
4
3
2
1
0
Bit numbers
Table 31 Status flags
Bit number
Status flag
Active flags means
0
Fail
Fail status condition active
1
Stopped speed
Below stopped speed
2
Normal speed
Above normal speed
3
Vent valve closed
Vent valve energised
4
Start
Start command active
5
Serial enable
Serial enable active
6
Standby
Standby active
7
Half full speed
Above 50% full rotational speed
8
Parallel control mode
Exclusive control mode selection
9
Serial control mode
Exclusive control mode selection
10
Invalid Controller software
Controller internal software mismatch
11
Controller upload incomplete
Controller failed internal configuration
and calibration operation
12
Timer expired
Failure to reach or maintain half full speed
within the timer setting value
13
Hardware trip
Overspeed or overcurrent trip activated
14
Thermistor error
Pump internal temperature measurement
system disconnected or damaged
15
Serial control mode interlock
Serial enable has become inactive
following a serial Start command
The system status word used in the example above was obtained with the pump at rest.
By decoding the word, we can learn more about the state of the pump.