B800-00-880 Issue D
Page 74
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Maintenance
Note:
The alarm LED error flash sequence is capable of signalling multiple fail conditions. For example, error flash
code sLssLs signifies both error 2 (controller failed internal configuration and calibration operation) and
error 5 (pump internal measurement system disconnected or damaged).
5.5.9
Decoding system status words
If using the serial communications link, additional information, that may be useful for fault finding, can 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:
The reply will be as follows, where the first returned number refers to motor rotational speed in revolutions per
second (Hz):
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. (
Table 29
is provided as an aid.) Follow the example below:
5
ssssLs
Pump internal measurement system
disconnected or damaged.
Cycle the power to the pump and see
whether the error code appears again.
If it does, contact the supplier or
Edwards.
6
sssssL
Serial enable becomes inactive
following a serial start command.
Re-activate serial enable and send a
serial stop command to clear the error
code.
Command
?
V
8
5
2
cr
Reply
=
V
8
5
2
sp d
d
d
d
;
h
h
h
h
h
h
h
h
cr
2
2
8
3
0
0
2
2
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
Table 29 - Hexadecimal conversion table
Hexadecimal
Binary
Decimal
0
0000
0
1
0001
1
2
0010
2
3
0011
3
4
0100
4
5
0101
5
6
0110
6
7
0111
7
8
1000
8
9
1001
9
A
1010
10
B
1011
11
C
1100
12
Table 28 - Flashing error codes
Error flash
position
Error flash
code
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