Analog Input - IDEC SmartAXIS FT9Z-1A01 User Manual

Analog Input

This section describes input analog signals such as those from pressure sensors.
The SmartAXIS is equipped with embedded analog inputs. This function acquires 0 to 10V DC voltage analog input by converting it
into 0 to 1000 digital values. The converted analog signals are stored in special data registers. External inputs that are not
specified as analog inputs are digital inputs.
For the on/off threshold value when digital input is specified, see "Product Specifications" on page 2-1.
Note: When analog input is configured as digital input, the input filter is active.
Analog input value storage locations
A maximum of eight analog inputs can be used. The converted analog signals are stored in special data registers (D8040 to
D8047: read-only) as values between 0 and 1000. These values are updated with each scan.
Analog input (I)
Special data register that stores the analog input
value
Analog Input Filter
The analog input data is averaged by the specified filter count. This can reduce rapid fluctuations in analog input.
The larger this value is set, the slower the tracking of the change in analog input becomes.
Count
0
1 to 255
When filtering, the input value is calculated with the equation below.
Analog input value after filtering =
Analog Input Allocation
The analog inputs are shared with the digital inputs. The allocation of analog inputs varies based on to the model.
12-I/O type
Input (I)
Analog input (AI)
Special data register that
stores the analog input
value
24-I/O type
Input (I)
Analog input (AI)
Special data register that
stores the analog input
value
40-I/O type
Input (I)
Analog input (AI)
Special data register that
stores the analog input
value
48-I/O type
Input (I)
Analog input (AI)
Special data register that
stores the analog input
value
0
D8040
No filtering
The input value is set as the average value of n samples of analog input data. (n: Count)
Total analog input values for filter count (n) worth of scans
0 ... 5
— — —
— — —
0 ... 13
— — —
— — —
0 ... 21
— — —
— — —
0 ... 25
— — —
— — —
S A XI S P / L
M AR T R O I TE
1 2 3
D8041 D8042 D8043
Description
Filter count n
6 7
0 1
D8040 D8041
14 15 16
0 1 2
D8040 D8041 D8042
22 23 24
0 1 2
D8040 D8041 D8042
26 27 30
0 1 2
D8040 D8041 D8042
U ' M FT9Y-B 1378
SER S ANUAL
5: S
P ECI AL
4 5 6
D8044 D8045 D8046
17
3
D8043
25 26 27
3 4 5
D8043 D8044 D8045
31 32 33
3 4 5
D8043 D8044 D8045
F
UN CTI ON S
7
D8047
34 35
6 7
D8046 D8047
5-39