Edwards nEXT nEXT85 - Decoding System Status Words

Error ash
posion
Error ash
code
Comments Acons
4 sssLss
Overspeed or overcurrent trip is
acvated, or other hardware fault
Restart the system. If the error
code is not cleared, contact us or
the supplier.
5 ssssLs
Pump internal measurement
system is disconnected or
damaged
Restart the system. If the error
code is not cleared, contact us or
the supplier.
6 sssssL
Serial enable becomes inacve
aer a Serial Start command
Acvate the Serial Enable again
and send a Serial Stop command
to clear the error code.
Note:
The alarm LED error ash sequence is capable of signaling mulple fail condions. For
example, error ash code sLssLs signies error 2 (controller failed internal conguraon
and calibraon operaon) and error 5 (pump internal measurement system disconnected
or damaged).
8.4 Decoding system status words
When you use the serial communicaons link, addional informaon that can be useful
for the fault nding can be accessed. When sending a query to monitor measured motor
speed, the pump also returns a System Status Word.
The send command that follows:
Command ? v 8 5 2 cr
The reply is as follows (where, rst returned number refers to motor rotaonal speed in
revoluons per second (Hz) and second part is the system status word):
Reply = v 8 5 2 sp d d d d ; h h h h h h h h cr
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. Example:
2 2 8 3 0 0 2 2
ê ê ê ê ê ê 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
Refer to Table: Hexadecimal conversion table on page 91 for more informaon.
Table 32
Hexadecimal conversion table
Hexadecimal Binary Decimal
0 0000 0
1 0001 1
2 0010 2
3 0011 3
4 0100 4
5 0101 5
Page 91
B8G000880_D - Fault nding