Mitsubishi L Series User Manual

67
CHAPTER 8 FUNCTIONS
8
8.4 Input Range Extended Mode Function
8.4 Input Range Extended Mode Function
Using this function, the available input range in 4 to 20mA and 1 to 5V can be extended.
(1) Overview
• The analog input value can be monitored in the extended mode even if errors vary depending on sensors
and the analog input value is less than 4mA or 1V in the input range of 4 to 20mA and 1 to 5V.
• The slope of Input/output characteristic of the extended mode is the same as that of the normal mode.
However, the upper limit value and the lower limit value of the input range and the digital output value are
extended.
• The resolution is the same between the extended input range and the input range of 4 to 20mA and 1 to 5V.
This enables the A/D conversion with higher resolution compared to the use of the input range of 0 to 20mA
and 0 to 5V.
For details on the current input characteristic and voltage input characteristic, refer to the following.
• I/O conversion characteristic of A/D conversion ( Page 203, Appendix 3)
(2) Setting procedure
Set the input range into the extended mode in the input range setting of the switch setting.
If the input range extended mode function, scaling function, shift function, and difference conversion function are
simultaneously used, the digital output value may exceed the range of -32768 to 32767.
In this case, a value fixed at the upper limit value (32767) or at the lower limit value (-32768) is stored as a scaling value
(digital operation value).
• Processing each function ( Page 61, Section 8.1)
Input range
Normal mode
Input range
setting
Input range
setting
Digital output value Input range
Extended mode
Digital output value
4 to 20mA
1 to 5V
4 to 20mA
1 to 5V
0 to 20000
4 to 20mA
(Extended mode)
1 to 5V
(Extended mode)
0.0 to 22.0mA
0.0 to 5.5V
-5000 to 22500
22979
22500
20000
0
-5000
0
Extended
410 2022
Analog input current (mA)
Input/output characteristic in 4 to 20mA (extended mode)
-5480
Extended
Digital output value
4 to 20mA
4 to 20mA
(extended mode)
22979
22500
20000
0
-5000
0
Extended
1 5 5.5
Analog input voltage (V)
-5480
Extended
Digital output value
Input/output characteristic in 1 to 5V (extended mode)
1 to 5V
(extended mode)
1 to 5V

Mitsubishi L Series Specifications

General

Brand	Mitsubishi
Model	L Series
Category	Engine
Language	English