![background image](http://html.mh-extra.com/html/abb/acs320-series/acs320-series_user-manual_2965298.webp)
298 Fieldbus control
Actual value scaling
The scaling of actual values can be protocol dependent. In general, for Actual values,
scale the feedback integer using the parameter’s resolution. (See section
for parameter resolutions.) For example:
Where parameters are in percent, section
specifies what parameter
corresponds to 100%. In such cases, to convert from percent to engineering units,
multiply by the value of the parameter that defines 100% and divide by 100%. For
example:
1. Assuming, for the sake of this example, that the Actual value uses parameter
as the 100% reference, and that 9908 = 1800 rpm.
2. Assuming, for the sake of this example, that the Actual value uses parameter
as
the 100% reference, and that 9907 = 6.00 Hz.
Although Actual value scaling could differ from the above for the N2 and FLN
protocols, it currently does not. To confirm, see the following sections, as appropriate:
•
in the
section.
•
in the
section.
Scaling does not apply for the BACnet protocol.
Feedback
Integer
Parameter
Resolution
(Feedback Integer) * (Parameter Resolution) = Scaled Value
1
0.1 mA
1 * 0.1 mA = 0.1 mA
10
0.1%
10 * 0.1% = 1%
Feedback
Integer
Parameter
Resolution
Value of the
Parameter that
defines 100%
(Feedback Integer) * (Parameter Resolution)
* (Value of 100% Ref.) / 100% = Scaled Value
10
0.1%
1800 rpm
1
10 * 0.1% * 1800 RPM / 100% = 18 rpm
100
0.1%
600 Hz
2
100 * 0.1% * 600 Hz / 100% = 60 Hz
Summary of Contents for ACS320 series
Page 1: ...ABB drives User s manual ACS320 drives 0 5 to 30 hp ...
Page 4: ......
Page 18: ...18 Safety ...
Page 28: ...28 Operation principle and hardware description ...
Page 56: ...56 Electrical installation ...
Page 142: ...142 Program features Connection diagram example ACS320 xx xxxx x ...
Page 282: ...282 Actual signals and parameters ...
Page 358: ...358 Fieldbus control ...
Page 376: ...376 Fault tracing ...
Page 382: ...382 Maintenance and hardware diagnostics ...
Page 407: ...Dimension drawings 407 Frame size R2 NEMA 1 Frame size R2 IP20 NEMA 1 3AUA0000051097 A ...
Page 409: ...Dimension drawings 409 Frame size R3 NEMA 1 Frame size R3 IP20 NEMA 1 3AUA0000051118 A ...
Page 411: ...Dimension drawings 411 Frame size R4 NEMA 1 Frame size R4 IP20 NEMA 1 3AUA0000051133 A ...
Page 412: ...412 Dimension drawings ...
Page 413: ...Index Numerics A B C D E F G H I K L M N O P R S T ...