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4.5 PROGRAMMING AND MONITORING FUNCTIONS
For Monitoring and Programming functions use the following equation. This is the direct data format.
R
Y = (mX + b )* 10
Where
Y - digital value sent or received from the supply.
X is the normal value (V, A, °C)
m, b, R - coefficients that are explained in Table 1.
Voltage (V)
Physical value
48
Voltage Programming
Voltage monitoring
Current monitoring
Temperature monitoring
32
Voltage Programming
Voltage monitoring
Current monitoring
Temperature monitoring
24
Voltage Programming
Voltage monitoring
Current monitoring
Temperature monitoring
12
Voltage Programming
Voltage monitoring
Current monitoring
Temperature monitoring
m, b, R coefficients can also be recovered from the EEPROM
coefficients are stored in ASCII Format
Command name
MFR_VOLTAGE_MON_COEFF
MFR_CURRENT_MON _COEFF
MFR_TEMP_MON_COEFF
MFR_VOLTAGE PROG_COEFF
4.5.1 MONITORING THE OUTPUT VOLTAGE (READ_VOUT)
The accuracy of the voltage reading is +/-2%
The output voltage is read before the ORING Circuit (~50mV Voltage drop @ load, no drop @no load).
The read back Output Voltage can be calculated using the "Direct data Format".
Refer to Table 1 for the Coefficients for calculating the Output Voltage.
Command code
8Bh
Example: Power Supply HFE1600-48;
Hex read back = 032Ch;
Converted to Decimal = 812;
Using the required coefficients the Output Voltage 812x100/1705 = 47.62V.
Read the Actual Output Voltage on the Output Bus Bar (Ex: 47.90V). Add 0.05V to compensate ORing Circuit drop
So, the actual voltage is (Ex: 47.90 + 0.05 = 47.95V).
Accuracy is (47.95-47.62)/60(*1)x100 = 0.55%
- R
X = (Y*10
- b )/m
Physical Unit
Min. Value
V
38.4
V
0
A
0
°C
0
V
28.8
V
0
A
0
°C
0
V
19.2
V
0
A
0
°C
0
V
9.6
V
0
A
0
°C
0
Command code
D2h
D3h
D4h
D5h
Type
Read Word
Supply (*1)
HFE1600-12
HFE1600-24
HFE1600-32
HFE1600-48
17
Max. Value
m
b
58
426
-15335
60
1705
0
40
25575
0
100
1023
0
38.4
639
-15333
40
25575
0
60
1705
0
100
1023
0
29
853
-15360
30
341
0
80
12787
0
100
1023
0
13.2
1705
-15345
15
682
0
160
6394
0
100
1023
0
Type
#Data bytes
Read Block
Read Block
Read Block
Read Block
#Data bytes
2
Full Scale (*1)
15V
30V
40V
60V
Table 1
R
-1
-2
-3
-2
-1
-3
-2
-2
-1
-1
-3
-2
-1
-1
-3
-2
16
16
16
17
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