ESD C.3020.02, Руководство пользователя

Страница: 87 / 108

Device Profile Area
CAN-CBX-AI814
Manual • Doc.-No.: C.3020.21 / Rev. 1.5
Page 87 of 108
8.10.5 Read Input Raw Data 16-Bit (6404
h
)
Index
Sub-
index
Description Value range Default Data type
Access
mode
6404
h
0 Number of entries 8 8 unsigned 8 ro
1 Read_Analog_In_Raw_16_1 8000
h
...7FFF
h
- integer 16 ro
2 Read_Analog_In_Raw_16_2 8000
h
...7FFF
h
- integer 16 ro
3 Read_Analog_In_Raw_16_3 8000
h
...7FFF
h
- integer 16 ro
4 Read_Analog_In_Raw_16_4 8000
h
...7FFF
h
- integer 16 ro
5 Read_Analog_In_Raw_16_5 8000
h
...7FFF
h
- integer 16 ro
6 Read_Analog_In_Raw_16_6 8000
h
...7FFF
h
- integer 16 ro
7 Read_Analog_In_Raw_16_7 8000
h
...7FFF
h
- integer 16 ro
8 Read_Analog_In_Raw_16_8 8000
h
...7FFF
h
- integer 16 ro
Assignment of the variable Read_Analog_In_Raw_16_x (x = 1...8):
The last digit of the name of the variable is the number of the respective analog input channel.
The data bits are shifted left-aligned in the 16-bit variable.
Calculation of the measured voltage:
The measured voltage is calculated of the value gained by addition and averaging of the variable
Read_Analog_In_Raw_16_x (see also diagram on page 82):
Value of the variable
Read_Analog_In_Raw_16_x
Measured voltage
(object 2402
h
= 3,
object 2403
h
= 4)
Binary (bit
¹º»»»¼
)
Hexadecimal
¹º ¹½ ¹¾ ¹¿ ¹¹ ¹¼ À Á  à º ½ ¾ ¿ ¹ ¼
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
8000
h
-10.24 V
: : : : : : : : : : : : : : : :
: :
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
FFFF
h
-0.3125 mV
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0000
h
0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
0001
h
+0.3125 mV
: : : : : : : : : : : : : : : :
: :
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
7FFF
h
+10.24 V - (1 LSB
VARIABLE
)
= 10.2397 V
Resolution of the measured values:
1 LSB based on the variable Read_Analog_Input_16_x (x = 1...8):
1 LSB
VARIABLE
=> 10.24 V / 8000
h
=> 0.3125 mV