Table of Contents
Advertisement
3 SPECIFICATION
3.4.2 Current input characteristic
(V)
4000
3000
2000
1000
0
0
Fig. 3.6 Current input characteristic graph
3 - 10
An example of current input characteristic graph when the offset/gain settings are
changed is shown in Fig. 3.6.
1)
2)
10
Analog input current (m A)
[Example]
On the characteristic graphs 1) to 2), the digital output current will be as follows when
the analog input value is set to 5 mA and 12 mA:
No.
Analog input value
5 mA
1)
12 mA
8 mA
2)
12 mA
POINT
• When a current exceeding the range of -30mA to 30mA is input, the elements
may be damaged due to heating.
• The overall accuracy is the accuracy outlined in the performance specifications
when the input current is in the range of 0 to 20mA. If the input current is outside
the range of 0 to 20mA, the accuracy may not be as indicated in the performance
specifications.
• When a value which causes the digital output value to exceed the maximum
(4000) or minimum (0) digital value is input, the digital output value will be fixed at
the maximum (4000) or minimum (0) digital value.
The current input characteristic when the
offset value and gain value are set as shown
in the table below is shown in the figure at
left.
Offset value
1)
2)
20
Digital output value
1000
2400
250
2000
MELSEC-A
Gain value
0 mA
20 mA
4 mA
20 mA
3 - 10
Advertisement
Table of Contents
