Marathon Electric DVR 2000E+ - Page 63

63
Marathon Electric (a division of RBC Manufacturing Corp.) reserves the right to change specications and this manual without notice.
Revised 06/2011
AUXILIARY INPUT METERING - This message displays the mode and metered value of the auxiliary input.
Message ID: (0xFFBA) Auxiliary Input Metering
Source: DVR
®
2000E+
Message Group: Metering
PDU Format: 255 (PDU2)
PDU Specific: 186
BYTE 0 BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5 BYTE 6 BYTE 7
Auxiliary
Input
Mode
Scaled
Meter
Value
(LSB)
Scaled
Meter
Value
(MSB)
Scale
Factor
Scalar
(LSB)
Scale
Factor
Scalar
(MSB)
Scale
Factor
Exp
Unused Unused
0x?? 0x?? 0x?? 0xFF 0xFF 0xFF 0xFF 0xFF
Byte 0 Auxiliary Input Mode – displays the mode selected for the auxiliary input channel
(enumerated)
0x00 Auxiliary Off (default)
0x01 Auxiliary Control
0x02 Auxiliary Meter
Byte 1-2 Scaled Meter Value – displays the metered value of the analog input channel.
If Auxiliary Input Mode is Auxiliary Off or Auxiliary Control, this value corresponds to
a value representing a voltage with 1 bit = 0.001 Volts, signed 16 bit
If Auxiliary Input Mode is Auxiliary Meter, this value represents a scaled, metered
quantity with scale factor given by bytes 3-5.
Byte 3-5 Scale Factor – these three bytes comprise the metering scale factor as a fixed-point
number. The scale factor is calculated as: Scalar*2^(-Exp) where Scalar is a 16-bit
word with LSB and MSB given by bytes 3 and 4 and the exponent is given by byte
5.Thisscalefactorismultipliedbythequantity0.001V/bittoobtainthescaled
value represented in bytes 1-2.