ABB ACS350 User Manual page 251

Reference correction examples for DCU profile
With DCU profile the fieldbus reference type can be Hz, rpm or percent. In the
following examples the reference is in rpm.
Setting
COMM+AI1 COMM/1000 + (AI(%) -50%) · (MAX-MIN)
Corrected
reference
1500 rpm
750 rpm
0 rpm
0
Corrected
reference
1500 rpm
1200 rpm
750 rpm
300 rpm
0 rpm
0
When COMM > 0 rpm
AI = 100%
AI = 50%
AI = 0%
150000
750000
AI = 100%
AI = 50%
AI = 0%
750000
150000
Maximum limit is defined by parameter
Minimum limit is defined by parameter
COMM/1000+ (AI(%) -50%) · (MAX-MIN)
COMM
REF
Max limit
Min limit
Max limit
Min limit
COMM
REF
COMM
REF
Min limit
Max limit
Max limit
Min limit
COMM
REF
1105 REF1 MAX /
1104 REF1 MIN /
Fieldbus control with embedded fieldbus
When COMM < 0 rpm
-150000 -750000
AI = 100%
AI = 50%
AI = 0%
-750000
-150000
AI = 100%
AI = 0%
AI = 50%
1108 REF2 MAX.
1107 REF2 MIN.
251
0
0 rpm
-750 rpm
-1500 rpm
Corrected
reference
0
0 rpm
-300 rpm
-750 rpm
-1200 rpm
-1500 rpm
Corrected
reference