SST-SALEM-3T Analog Devices, Inc., SST-SALEM-3T Datasheet - Page 15

• Manufacturer Part Number: SST-SALEM-3T
• Description: Salem Three-phase Electronic Energy Meter
• Manufacturer: Analog Devices, Inc.

Initialization Gain Constants
and DC Offsets
R Phase Voltage Gain
Y Phase Voltage Gain
B Phase Voltage Gain
R Phase Current Low Gain
Y Phase Current Low Gain
B Phase Current Low Gain
R Phase Current High Gain
Y Phase Current High Gain
B Phase Current High Gain
R Phase Voltage DC Offset
Y Phase Voltage DC Offset
B Phase Voltage DC Offset
R Phase Current Low Gain DC Offset
Y Phase Current Low Gain DC Offset
B Phase Current Low Gain DC Offset
R Phase Current High Gain DC Offset
Y Phase Current High Gain DC Offset
B Phase Current High Gain DC Offset
E-pulse (Type)*
Energy Pulse eφ = active
e1 = Apparent
Pulse E-pulse Constant
Pulse E-pulse Constant Range from 1,000–20,000 2
PHASE COMPENSATION VARIABLES
R Phase Coeff for High Current Range
R Phase Coeff for Middle Current Range
R Phase Coeff for Low Current Range
Y Phase Coeff for High Current Range
Y Phase Coeff for Middle Current Range
Y Phase Coeff for Low Current Range
B Phase Coeff for High Current Range
B Phase Coeff for Middle Current Range
B Phase Coeff for Low Current Range
*The first byte to be sent for initialization is 45h followed by all the above tabled
Phase Compensation Coefficients
Three sets of filter coefficients have been provided which will be
automatically selected by the DSP during execution based on
the maximum current (Imax). In the ADSST-EM-3035, the
Imax is fixed at 20 Amps. Therefore the current ranges have
been grouped as:
•
•
•
REV. 0
parameters in the same sequence.
Range from 1,000–20,000 Impulse Constant 1 2
High current range: From 20 Amps to 7 Amps
Middle current range: 7 Amps to 1.5 Amps
Low current range: 1.5 Amps to 0 Amps
(pulses/kWh)
Table III. Data Transfer to DSP on Power-Up
Value Defaults
2
2
2
2
2
2
2
2
2
1
12
12
12
12
12
12
12
12
2
2
2
2
2
2
2
2
2
12
4000h
4000h
4000h
4000h
4000h
4000h
4000h
4000h
4000h
0
0
0
0
0
0
0
0
0
1
2000
2000
0000,
0000,
7FFF,
0000,
0000,
0000
-Do-
-Do-
-Do-
-Do-
-Do-
-Do-
-Do-
-Do-
–15–
Data from DSP to Microcontroller
To facilitate easy of operation, the data transfer form DSP to
microcontroller has been segregated into multiple blocks.
Table IV lists the various data blocks:
DATA from DSP on SPI BUS
REQUEST CODE 45h
Table IV. Data Transfer Sequence from DSP to Microcontroller
R Phase Voltage
R Phase Current
R Phase Active Power
R Phase Apparent Power
R Phase Inductive Power
R Phase Capacitive Power
R Phase Power Factor
R Phase Active Energy Import
R Phase Apparent Energy
R Phase Inductive Energy
R Phase Active Energy Export
R Phase Capacitive Energy
Y Phase Voltage
Y Phase Current
Y Phase Active Power
Y Phase Apparent Power
Y Phase Inductive Power
Y Phase Capacitive Power
Y Phase Power Factor
Y Phase Active Energy Import
Y Phase Apparent Energy
Y Phase Inductive Energy
Y Phase Active Energy Export
Y Phase Capacitive Energy
B Phase Voltage
B Phase Current
B Phase Active Power
B Phase Apparent Power
B Phase Inductive Power
B Phase Capacitive Power
B Phase Power Factor
B Phase Active Energy Import
B Phase Apparent Energy
B Phase Inductive Energy
B Phase Active Energy Export
B Phase Capacitive Energy
Total Active Power
Total Apparent Power
Total Inductive Power
Total Capacitive Power
Average Power Factor
Total Active Energy Import
Total Apparent Energy
Total Inductive Energy
Total Active Energy Export
Total Capacitive Energy
Frequency
R Phase Channel_Present
Y Phase Channel_Present
ADSST-EM-3035
Byte(s)
1
2
2
4
4
4
4
2
4
4
4
4
4
2
2
4
4
4
4
2
4
4
4
4
4
2
2
4
4
4
4
2
4
4
4
4
4
4
4
4
4
2
4
4
4
4
4
2
1
1