ABB ACS355 series - Page 347

Fieldbus control with fieldbus adapter 347
If the network employs the ODVA AC/DC drive profile and the drive is operating in the
scalar mode, the fieldbus speed reference unit is always rpm. The fieldbus adapter
module can provide the drive with a frequency reference, if parameter FB PAR 23
ODVA SPEED SCALE or FB PAR 10 ODVA SPEED SCALE is set, but this might not
guarantee the accurate speed reference. If there is no accurate speed reference and
the EXT1 reference is used, set parameter 1103 REF1 SELECT to ODVA HZ REF
(36) to convert the ODVA AC/DC speed reference and actual value type to Hz. In
addition, you can set the decimal point location for ODVA frequency reference values
by selecting the correct scaling format with parameter 1109 ODVA HZ REF SEL.
Note: The ODVA AC/DC reference conversion is available only for EXT1 in the scalar
mode. The supported networks are Ethernet/IP and DeviceNet.
COM
M*AI1
(COMM/1000) · (AI(%) / 50%) (COMM/1000) · (AI(%) / 50%)
Maximum limit is defined by parameter 1105 REF1 MAX / 1108 REF2 MA.
Minimum limit is defined by parameter 1104 REF1 MIN / 1107 REF2 MIN.
Setting When COMM > 0rpm When COMM < 0 rpm
AI = 50%
AI = 100%
AI = 0%
1500
Corrected
reference (rpm)
750
0
Max. limit
Min. limit
COMM
REF
0 750000 1500000
AI = 50%
AI = 0%
AI = 100%
COMM
REF
0
-750
-1500
0
Max. limit
Min. limit
Corrected
reference (rpm)
-750000-1500000
AI = 50%
AI = 100%
AI = 0%
Corrected
reference (rpm)
Ma.x limit
Min. limit
COMM
REF
0
1500
750
0
1200
300
750000 1500000
AI = 50%
AI = 0%
AI = 100%
COMM
REF
0
-750
-1500
0
-300
-1200
Max. limit
Min. limit
Corrected
reference (rpm)
-750000-1500000