Schneider Electric PowerLogic PM5300 Series Specifiche Scaricare il pdf (Pagina 53)

63230-507-201A1 Power Meter 750

03/2007 Appendix B—Register List

When the power factor is lagging, the power meter returns a high negative

value—for example, -31,794. This happens because bit 15=1 (for example,

the binary equivalent of -31,794 is 1000001111001110). To get a value in

the range 0 to 1,000, you need to mask bit 15. You do this by adding 32,768

to the value. An example will help clarify.

Assume that you read a power factor value of -31,794. Convert this to a

power factor in the range 0 to 1.000, as follows:

-31,794 + 32,768 = 974

974/1,000 = .974 lagging power factor

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Schneider Electric PowerLogic PM5300 Series Specifiche Pagina 53