ABB ACS355 User Manual

308 Fieldbus control with embedded fieldbus
Fieldbus references
 Reference selection and correction
Fieldbus reference (called COMM in signal selection contexts) is selected by setting a
reference selection parameter – 1103 REF1 SELECT or 1106 REF2 SELECT – to
COMM, COMM+AI1 or COMM*AI1. When parameter 1103 or 1106 is set to COMM,
the fieldbus reference is forwarded as such without correction. When parameter 1103
or 1106 is set to COMM+AI1 or COMM*AI1, the fieldbus reference is corrected using
analog input AI1 as shown in the following examples for the 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 1105 REF1 MAX / 1108 REF2 MAX.
Minimum limit is defined by parameter 1104 REF1 MIN / 1107 REF2 MIN.
AI = 50%
AI = 100%
AI = 0%
1500
Corrected
reference (rpm)
750
0
Max. limit
Min. limit
COMM
REF (%)
100500
AI = 50%
AI = 0%
AI = 100%
COMM
REF (%)
Corrected
reference (rpm)
0
-750
-1500
-100 -50 0
Max. limit
Min. limit
AI = 50%
AI = 100%
AI = 0%
Corrected
reference (rpm)
Max limit
Min limit
COMM
REF (%)
100500
1500
750
0
1200
300
AI = 50%
AI = 0%
AI = 100%
COMM
REF (%)
0
-750
-1500
-100 -50 0
-300
-1200
Corrected
reference (rpm)
Max. limit
Min. limit

ABB ACS355 Specifications

General

Input Voltage	200 V to 240 V AC, 380 V to 480 V AC
Frequency	47 Hz to 63 Hz
Control Method	Scalar control
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short circuit
Communication Interfaces	Modbus RTU, CANopen
Enclosure Rating	IP20
Operating Temperature	-10°C to +50°C (14°F to 122°F)
Storage Temperature	-40°C to +70°C (-40 to +158 °F)
Humidity	95% RH (non-condensing)
Altitude	Up to 1000 m (3280 ft) without derating