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11 Use of Built-in Analog
101
FX3S Series Programmable Controllers
User's Manual - Hardware Edition
11
Built-in Analog
12
Output Wiring
13
Wiring for
Various Uses
14
Test Run,
Maintenance,
Troubleshooting
15
Other Extension
Units and
Options
16
Display Module
(FX
3S
-5DM)
17
Memory
Cassette
A
Special Devices
(M8000-, D8000-)
B
Instruction List
C
Discontinued
models
11.3 Built-in analog input function
11.3 Built-in analog input function
11.3.1 Outline of functions
The main unit has two built-in analog voltage inputs (shown in the figure below).
A/D conversion data will be automatically written to special data registers of the PLC.
11.3.2 Applicable PLC
The following models have built-in analog inputs.
11.3.3 Analog input performance specifications
Applicable PLC
FX3S-30MR/ES-2AD FX3S-30MT/ES-2AD FX3S-30MT/ESS-2AD
Item Input specification
Analog input range 0 to 10 V DC (Input resistance: 115.7 kΩ)
Absolute maximum input -0.5 V, +15 V
Digital output 10 bits, binary
Device allocation
D8270 (The digital value of CH1 is stored)
D8271 (The digital value of CH2 is stored)
Resolution 10 mV (10 V/1000)
Total accuracy
± 1.0 % (± 100 mV) for 10 V full scale
(when ambient temperature is 25 °C ± 5 °C)
± 2.0 % (± 200 mV) for 10 V full scale
(when ambient temperature is 0 °C to 55 °C)
A/D conversion time
180 μs
(The data will be updated at every scan time of the PLC.)
Input characteristics
Insulation method No insulation between each channel or the PLC.
Occupied points
0 point
(This number is not related to the maximum number of input/output points of the
PLC.)
Analog input
enlarged view
V-
V2+
V1+
Digital output
Analog input
0 10.2V
1020
1000
10V