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Control through the embedded fieldbus interface 351
References for the DCU 32-bit profile
The DCU 32-bit profile supports the use of two fieldbus references, REF1 and REF2.
The references are 32-bit values consisting of two 16-bit words. The MSW (Most
significant word) is the integer part and the LSW (Least significant word) the fractional
part of the value. A negative reference is formed by calculating the two’s complement
from the corresponding positive value of the integer part (MSW).
The fieldbus references are written as is into the drive reference values (
). Parameters
and
define the reference types (speed or torque) as follows:
• If you select value
, the fieldbus reference type or possible use is not
selected. The value is freely usable as a speed or torque reference in the drive.
The table below clarifies the relation between the fieldbus reference and drive
reference (no scaling).
1)
If the reference value is used as the speed reference, it will be the motor speed in rpm. If the reference
value is used as the torque reference, it will be the motor torque in percent of the motor nominal torque.
• If you select value
, the fieldbus reference can be used as a speed
reference in the drive. The table below clarifies the relation between the fieldbus
reference and drive reference (no scaling).
Actual signals for the DCU 32-bit profile
The DCU 32-bit profile supports the use of two fieldbus actual values ACT1 and
ACT2. The fieldbus actual values are 32-bit values consisting of two 16-bit words.
The MSW (Most significant word) is the integer part and the LSW (Least significant
word) the fractional part of the 32-bit value. A negative reference is formed by
calculating the two’s complement from the corresponding positive value of the integer
part (MSW).
Parameters
and
select the drive
actual signals for the fieldbus actual values ACT1 and ACT2 respectively as follows:
• If you select value
, the drive parameters
and
select the drive parameters for the fieldbus actual value
Fieldbus reference REF1 or REF2
[integer and fractional part]
Corresponding reference
in the drive [rpm or %]
1)
32767.65535
32767.65535
0
0
-32768.65535
-32768.65535
Fieldbus reference REF1 or REF2
[integer and fractional part]
Corresponding speed reference
in the drive [rpm]
32767.65535
32767.65535
0
0
-32768.65535
-32768.65535
Содержание ACQ810
Страница 1: ...ABB industrial drives Firmware manual Standard pump control program for ACQ810 drives ...
Страница 4: ......
Страница 14: ...14 About the manual ...
Страница 56: ...56 Control locations ...
Страница 97: ...Application macros 97 ...
Страница 98: ...98 Application macros ...
Страница 100: ...100 Application macros ...
Страница 101: ...Application macros 101 ...
Страница 106: ...106 Application macros 75 01 Operation mode Multipump 76 01 Enable MF comm Yes ...
Страница 356: ...356 Control through the embedded fieldbus interface ...
Страница 366: ...366 Control through a fieldbus adapter ...
Страница 374: ...374 Control block diagrams ...