© Edwards Limited 2013. All rights reserved.
Page 75
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Maintenance
B800-00-880 Issue D
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.
Table 30
contains a list of the lower 16 status flags that will be useful for fault finding. The upper 16 status flags are
reserved by Edwards.
Binary digits
Bit numbers
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. Refer to
Table 31
.
D
1101
13
E
1110
14
F
1111
15
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
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
Table 30 - Status flag
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.
Table 29 - Hexadecimal conversion table (continued)
Hexadecimal
Binary
Decimal
