Daikin MD5 - Actual Value Scaling

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. For example:
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%
Where parameters are in percent, the Complete parameter
descriptions section species what parameter corresponds to
100%. In such cases, to convert from percent to engineering
units, multiply by the value of the parameter that denes 100%
and divide by 100%. For example:
Feedback Integer Parameter Resolution Value of the Parameter that denes 100%
(Feedback Integer) × (Parameter Resolution) × (Value of 100%
Ref.) / 100% = Scaled Value
10 0.1% 1500 rpm
1
10 * 0.1% * 1500 RPM / 100% = 15 rpm
100 0.1% 500 Hz
2
100 * 0.1% * 500 Hz / 100% = 50 Hz
1. Assuming, for the sake of this example, that the Actual Value uses parameter 9908 MOT NOM SPEED as the 100% reference, and that 9908 = 1500 rpm.
2. Assuming, for the sake of this example, that the Actual Value uses parameter 9907 MOT NOM FREQ as the 100% reference, and that 9907 = 500 Hz.
Although Actual Value scaling could differ from the above for
the N2 and FLN protocols, it currently does not. To conrm, see
the following sections, as appropriate:
• N2 analog input objects in the N2 protocol technical data
section.
• Scaling drive feedback values in the FLN protocol
technical data section.
Scaling does not apply for the BACnet protocol.
eMbedded fieldbUs
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