18
2 SPECIFICATIONS
2.4 I/O Conversion Characteristics
• Set values within the practical range of the analog input and the digital output at each input range. If the
range is exceeded, the resolution and accuracy may not fall within the range of the performance
specifications. (Do not use the values in the dotted line region in the graph of voltage input characteristics.)
• Do not set the voltage over
±
15 V. Doing so can cause breakdown of the elements.
Current input characteristics
The following shows the list of the analog input ranges and the graph of each current input characteristic, at the current input.
*1 Set the offset value and gain value in the user range setting within a range satisfying the following conditions. Failure to satisfy the
conditions may not result in proper A/D conversion.
Gain value
≤
20 mA, offset value
≥
0 mA
((Gain value) - (Offset value))
≥
16 mA
*2 If an analog input value exceeds the range of digital output value, the digital output value is fixed to the maximum or minimum value.
Input range setting
Digital output value
Minimum
Maximum
0 to 10 V
-768
+32767
0 to 5 V
1 to 5 V
-10 to +10 V
-32768
digit: Digital output value
I: Analog input current (mA)
(a): Practical analog input range
No.
Input range setting
Offset value
Gain value
Digital output
value
Resolution
(1)
0 to 20 mA
0 mA
20 mA
0 to 32000
625 nA
(2)
4 to 20 mA
4 mA
20 mA
500 nA
(3)
-20 to +20 mA
0 mA
20 mA
-32000 to +32000
625 nA
-30
-20
0
+20
-768
-32000
-32768
32767
32000
+30
4
(2)
0
(1)
(a)
I
digit
(3)
Содержание MELSEC iQ-F
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