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11.5 Decoding system status words
When using the serial communications link, additional information that may be useful
for fault finding is available to be accessed. When sending a query to monitor measured
motor speed, the pump also returns a System Status Word.
The send command is as follows:
Command
The reply will be as follows, where the first returned number refers to motor rotational
speed in revolutions per second (Hz) and the second part is the system status word::
Reply
=
v
8
The System Status Word returned is made up of 8 hexadecimal digits. To decode this
word, convert each digit into a 4‑digit binary number. Follow the example below:
2
2
ê
ê
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
is provided as an aid.
Table 30 Hexadecimal conversion table
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.
B8J200880_D
300812671_002_C3
B8J200880_D - Fault finding
?
v
5
2
sp d
d
8
3
ê
ê
Hexadecimal
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
8
5
d
d
;
h
h
0
ê
Binary
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Page 102
2
cr
h
h
h
h
h
0
2
ê
ê
Decimal
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
08/2021 - ©Edwards Limited
h
cr
2
ê
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