Fieldbus control with embedded fieldbus
249
Fieldbus references
Reference selection and correction
Fieldbus reference (called COMM in signal selection contexts) is selected by setting
a reference selection parameter –
– to COMM, COMM+AI1 or
REF1 SELECT or
REF2 SELECT is set to COMM, the
fieldbus reference is forwarded as such without correction. When parameter
or
is set to COMM+AI1 or COMM*AI1, the fieldbus reference is corrected using
analog input AI1 as shown in the following examples.
Reference correction examples for ABB Drives profile
Setting
When COMM > 0
When COMM < 0
COMM+AI1
COMM(%) · (MAX-MIN) + MIN
+ (AI(%) -50%) · (MAX-MIN)
COMM(%) · (MAX-MIN) - MIN
+ (AI(%) -50%) · (MAX-MIN)
Maximum limit is defined by parameter
Minimum limit is defined by parameter
REF2 MIN.
50%
1500 rpm
750 rpm
100%
COMM
AI = 50%
AI = 100%
AI = 0%
0%
REF
(%)
Min limit
Corrected
reference
0 rpm
Max limit
-50%
-1500 rpm
-7500 rpm
-100%
AI = 50%
AI = 0%
AI = 100%
0%
COMM
REF
(%)
Max limit
Min limit
Corrected
reference
0 rpm
50%
1500 rpm
750 rpm
100%
AI = 50%
AI = 100%
AI = 0%
0%
1200 rpm
300 rpm
COMM
REF
(%)
Max limit
Min limit
0 rpm
Corrected
reference
-50%
-1500 rpm
-750 rpm
-100%
AI = 50%
AI = 0%
AI = 100%
0%
-1200 rpm
-300 rpm
COMM
REF
(%)
Max limit
Min limit
0 rpm
Corrected
reference
Summary of Contents for ACS350 Series
Page 1: ...ACS350 User s Manual ACS350 Drives 0 37 22 kW 0 5 30 HP ...
Page 4: ......
Page 8: ...Safety 8 ...
Page 18: ...Table of contents 18 ...
Page 24: ...Hardware description 24 ...
Page 44: ...Installation checklist 44 ...
Page 56: ...Start up control with I O and ID Run 56 ...
Page 140: ...Program features 140 ...
Page 242: ...Actual signals and parameters 242 ...
Page 266: ...Fieldbus control with embedded fieldbus 266 ...
Page 284: ...Fault tracing 284 ...
Page 288: ...Maintenance and hardware diagnostics 288 ...
Page 309: ...Dimensions 309 Frame size R2 IP20 NEMA 1 3AFE68586658 A Frame size R2 IP20 NEMA 1 VAR EMC ...
Page 311: ...Dimensions 311 Frame size R3 IP20 NEMA 1 3AFE68579872 B Frame size R3 IP20 NEMA 1 VAR EMC ...
Page 313: ......