ACS 400 User’s Manual 145
Example of the effect of AI1 value on fieldbus reference.
Assume that 2008
MAXIMUM FREQ = 50 Hz
Assume that fieldbus reference 1 is 5000 (corresponding to 25 % of full scale) and voltage at AI1 is
3 V (corresponding to 30 % of full scale).
1. If setting
COMM+AI1 is used, then the corrected fieldbus reference is 25 % + 30 % - 50 % = 5 % or
2.5 Hz.
2. If setting
COMM*AI1 is used, then the corrected fieldbus reference is 25 % * 30 % / 50 % = 15 %
or 7.5 Hz.
2
1
50 %
AI1
100 %
50 %
100 %
FIELDBUS REFERENCE
REF
.
.
co
m
m + AI
c
o
m
m
*
A
I
http://nicontrols.com
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