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71M6534 Datasheet(PDF) 100 Page - Maxim Integrated Products |
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71M6534 Datasheet(HTML) 100 Page - Maxim Integrated Products |
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100 / 132 page  71M6533/G/H and 71M6534/H Data Sheet FDS_6533_6534_004 100 Rev 2 [1] PULSE_FAST 0 When PULSE_FAST = 1, the pulse generator input is increased 16x. When PULSE_SLOW = 1, the pulse generator input is reduced by a factor of 64. These two bits control the pulse gain factor X (see table below). Default is 0 for both (X = 6). PULSE_SLOW PULSE_FAST X 0 0 1.5 * 22 = 6 0 1 1.5 * 26 = 96 1 0 1.5 * 2-4 = 0.09375 1 1 Do not use [0] PULSE_SLOW 0 Table 59: Sag Threshold and Gain Adjust Control CE Address Name Default Description 0x24 SAG_THR 2.39*107 The voltage threshold for sag warnings. The default value is equivalent to 80 V RMS if VMAX = 600 V. The LSB value is VMAX * 7.8798*10-9 V. For example, if a sag threshold of 80 V RMS is required: 7 9 10 39 . 2 10 8798 . 7 2 80 _ ⋅ = ⋅ ⋅ ⋅ = − VMAX THR SAG 0x40 GAIN_ADJ 16384 This register scales all voltage and current channels. The default value is equivalent to unity gain (1.000). 5.3.8 CE Transfer Variables When the MPU receives the XFER_BUSY interrupt, it knows that fresh data is available in the transfer variables. CE transfer variables are modified during the CE code pass that ends with an XFER_BUSY interrupt. They remain constant throughout each accumulation interval. In this data sheet, the names of CE transfer variables always end with _X. The transfer variables can be categorized as: 1. Fundamental energy measurement variables 2. Instantaneous (RMS) values 3. Other measurement parameters Fundamental Energy Measurement Variables Table 60 describes each transfer variable for fundamental energy measurement. All variables are signed 32-bit integers. Accumulated variables such as WSUM are internally scaled so they have at least 2x margin before overflow when the integration time is one second. Additionally, the hardware will not permit output values to fold back upon overflow. Table 60: CE Transfer Variables CE Address Name Description 0x85 WSUM_X The signed sum: W0SUM_X+W1SUM_X+W2SUM_X. 0x86 W0SUM_X The sum of Wh samples from each wattmeter element. In_8 is the gain 1 or 8 as configured by In_SHUNT. LSB = 9.4045*10-13 VMAX IMAX / In_8 Wh. 0x87 W1SUM_X 0x88 W2SUM_X 0x8A VARSUM_X The signed sum: VAR0SUM_X+VAR1SUM_X+VAR2SUM_X. 0x8B VAR0SUM_X The sum of VARh samples from each wattmeter element. In_8 is the gain 1 or 8 as configured by In_SHUNT. LSB = 9.4045*10-13 VMAX IMAX / In_8 VARh. 0x8C VAR1SUM_X 0x8D VAR2SUM_X |
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