Omron NX Series Hardware User Manual page 134

5 Installation and Wiring
Operation at Power OFF
Execution of the user program is ended if a power interruption exceeds the time shown in the table
below. The processing after power interruption confirmation (described below) is performed, and then
the system (i.e., CPU Unit) stops.
Voltage drop
DC: 20.4 V max.
*1. The power OFF detection time is 2 to 4 ms.
As shown in the following figure, the system (i.e. CPU Unit) will stop even if the voltage recovers after
the power interruption detection time.
Voltage drop
DC: 20.4 V max.
*1. The power OFF detection time is 2 to 4 ms.
After stopping, the system will restart if the power supply remains recovery.
The table below defines the time that is used in the above two figures.
Item
Power OFF de-
tection time
Momentary Power Interruption with Continued Operation
Execution of the user program will continue if a momentary power interruption is less than the follow-
ing times.
5-4
Power interruption confirmed.
Executing user program
Power OFF detection time *1
Executing user program
*1
Power OFF detection time
The time from when the power supply voltage drops until the CPU Unit starts processing af-
ter the power interruption is confirmed. The CPU Unit continues to operate normally until the
power interruption is confirmed.
System stops.
(CPU Unit stops.)
Processing after power interruption is confirmed.
Power
System stops.
interruption
(CPU Unit stops.)
Voltage
confirmed.
recovery
Processing after power interruption is confirmed.
Description
NX-series NX502 CPU Unit Hardware User's Manual (W629)
System reset
System reset