IDEC FT1A Series User Manual

S MART AXIS P RO /L ITE U SER ' S M ANUAL FT9Y-B1378 5-39
5: S PECIAL F UNCTIONS
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 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.
When filtering, the input value is calculated with the equation below.
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
24-I/O type
40-I/O type
48-I/O type
Analog input (I) 01234567
Special data register that stores the analog input
value
D8040 D8041 D8042 D8043 D8044 D8045 D8046 D8047
Count Description
0 No filtering
1 to 255 The input value is set as the average value of n samples of analog input data. (n: Count)
Analog input value after filtering =
Total analog input values for filter count (n) worth of scans
Filter count n
Input (I) 0 ... 5 6 7
Analog input (AI) ———0 1
Special data register that
stores the analog input
value
— — — D8040 D8041
Input (I) 0 ... 13 14 15 16 17
Analog input (AI) ———0123
Special data register that
stores the analog input
value
— — — D8040 D8041 D8042 D8043
Input (I) 0 ... 21 22 23 24 25 26 27
Analog input (AI) ———012345
Special data register that
stores the analog input
value
— — — D8040 D8041 D8042 D8043 D8044 D8045
Input (I) 0 ... 25 26 27 30 31 32 33 34 35
Analog input (AI) ———01234567
Special data register that
stores the analog input
value
— — — D8040 D8041 D8042 D8043 D8044 D8045 D8046 D8047

IDEC FT1A Series Specifications

General

Programming Software	WindLDR
Type	Programmable Logic Controller (PLC)
Display	LCD (varies by model)
Communication Ports	RS232C/RS485 (built-in), USB (programming), Ethernet (optional)
Dimensions	Varies by model
Weight	Varies by model
Model	FT1A Series