Omron ZEN Operation Manual page 112

Analog Inputs (Analog Comparators (A))
12 to 24 VDC
(DC power supply type)
Analog input 1: I4
Analog input 2: I5
Note
Operation
• Example 1
(When comparison shows analog
input 1 ≥ 5.2 V)
Setting
10.5
10.0
5.2
00.0
0.0
Analog
comparator bit
The analog comparator bit turns
ON when the analog input voltage
reaches is 5.2 V or higher.
Precautions for Correct Use
88
Analog signal input:
Device with
0.0 to 10.0 V
analog voltage
output
Connect the negative side to COM for analog inputs. The analog
input circuit may be destroyed if the positive side is connected to
COM.
10.5 V
10.0 V
Input voltage
• Do not make negative signal inputs to analog inputs. If negative
signals are made, the internal elements may be damaged.
• A delay of up to 26 times the cycle time may occur from the time an
analog voltage equivalent to the SV is input until the analog
comparator bit turns ON. Refer to Appendix B Ladder Program
Execution on page 129 and be sure that this delay will not create
any problems.
Analog signal input:
0.0 to 10.0 V
12 to 24 VDC
Analog input: Ia
Analog input: Ib
• Example 2
(When comparison shows analog
input 1 is ≤ analog input 2)
Converted value
10.0
00.0
Analog
comparator bit
The analog comparator bit turns ON
when the analog input 2 voltage is
higher than the analog input 1 voltage.
Section 3-10
Device with
analog voltage
output
DC power supply type
Analog input 1
Analog input 2