A735-01-860 Issue A
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Connection for serial control and monitoring
3.9 Decoding status words
3.9.1 Decoding system status word
If you are using the serial communications link you will be able to access further information that may be useful for
fault finding. When you send a query to monitor measured motor speed, the pump also returns a system status word.
The send command is as follows:
You will receive the following reply, where the first returned number refers to motor rotational speed in revolutions
per second (Hz):
The system status word returned is made up of 4 separate status words, each made up of 4 hexadecimal digits and
are separated by a semi-colon ';'. The first status word is 'System status register 1', then 'System status register 2',
then 'Warning register' and the final status word is 'Fault register'. To decode each individual status word, you must
convert each hexadecimal digit into a 4-digit binary number. (Table 6 is provided as an aid.) Follow the example
below:
Command ?
V 8 0 2cr
Reply =
V 8 0 2spd d d;h h h h;h h h h;h h h h;h h h hcr
2283
0010001010000011
Table 6 - Hexadecimal conversion table
Hexadecimal Binary Decimal
000000
100011
200102
300113
401004
501015
601106
701117
810008
910019
A101010
B101111
C110012
D110113
E111014
F111115
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