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Analog Input Units Section 7-2
Analog Input Signal
Ranges
Analog input data is digitally converted according to the input signal range as
shown below.
Note When the input exceeds the specified range, the A/D conversion data will be
fixed at either the lower limit or upper limit.
Analog Input Signal
Ranges
■ −
10 to 10 V Inputs
When the resolution is 1/6,000, the –10 to 10 V range corresponds to hexa-
decimal values F448 to 0BB8 (–3,000 to 3,000). The range of data that can be
converted is F31C to 0CE4 hex (–3,300 to 3,300).
A negative voltage is expressed as two’s complement.
When the resolution is 1/12,000, the –10 to 10 V range corresponds to hexa-
decimal values E890 to 1770 (–6,000 to 6,000). The entire data range is E638
to 19C8 hex (–6,600 to 6,600).
A negative voltage is expressed as a two’s complement.
Item CP1W-AD041 CP1W-AD042
Voltage Input Current Input Voltage Input Current Input
Number of inputs 4 inputs (4 words allocated)
Input signal range 0 to 5 VDC,
1 to 5 VDC,
0 to 10 VDC,
or –10 to 10 VDC
0 to 20 mA
or 4 to 20 mA
0 to 5 VDC,
1 to 5 VDC,
0 to 10 VDC,
or –10 to 10 VDC
0 to 20 mA
or 4 to 20 mA
Max. rated input ±15 V ±30 mA ±15 V ±30 mA
External input impedance 1 MΩ min. Approx. 250 Ω 1 MΩ min. Approx. 250 Ω
Resolution 1/6000 (full scale) 1/12000 (full scale)
Overall accuracy 25°C 0.3% full scale 0.4% full scale 0.2% full scale 0.3% full scale
0 to 55°C 0.6% full scale 0.8% full scale 0.5% full scale 0.7% full scale
A/D conversion data
16-bit binary (4-digit hexadecimal)
Full scale for –10 to 10 V: F448 to 0BB8 Hex
Full scale for other ranges: 0000 to 1770 Hex
16-bit binary (4-digit hexadecimal)
Full scale for –10 to 10 V: E890 to 1770 Hex
Full scale for other ranges: 0000 to 2EE0 Hex
Averaging function Supported (Set in output words n+1 and n+2.)
Open-circuit detection function Supported
Conversion time 2 ms/point (8 ms/all points) 1 ms/point (4 ms/all points)
Isolation method Photocoupler isolation between analog I/O terminals and internal circuits. No isolation
between analog I/O signals.
Current consumption 5 VDC: 100 mA max.; 24 VDC: 90 mA max. 5 VDC: 100 mA max.; 24 VDC: 50 mA max.
0 V 10 V
11 V
−11 V
−10 V
Converted data
Hexadecimal (Decimal)
0CE4 (3300)
0BB8 (3000)
0000 (0)
F448 (−3000)
F31C (−3300)
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