LS Industrial Systems GLOFA G7M-DR30U - Page 165

Chapter 7. Usage of Various Functions
7-58
(2) Wiring
*1: Be sure to use two-core twisted shield wire.
5) Analog/Digital conversion characteristics
(1) Analog input characteristics
a) Voltage input
In voltage input, digital amount 0 is output by 0V input and 4,000 is output by 10V input. Therefore input 2.5mV equals
to digital amount 1, but value less than 2.5mV can’t be converted.
b) Current input
Current input 0mA becomes output 0, 10mA does 2000 and 20mA does 4000. therefore input 5 ㎂ equals to digital
amount 1, but value less tan 5 ㎂ can’t be converted. So abandon it.
Digital Output Value
Digital Output Value
2004
2002
2001
2000
2003
5.000V
5.0025V
Voltage Input
Digital Output Value
4000
2000
0
0V 5V 10V
A
nalog Input Voltage
A/D Conversion Characteristics (Voltage Input)
2004
2002
2001
2000
2003
10.000 ㎃ 10.005 ㎃
4000
2000
0
0㎃ 10 ㎃ 20 ㎃
A/D Conversion Characteristics (Current Input 0∼20 ㎃)
Analog
Input
+
-
+
-
Analog
Input
Volta
g
e
Current
V0
I0
COM0
V1
I1
COM1
Terminal Terminal
*1
*1
Digital Output Value
A
nalog Input Current
Current Input