5 - 5
5 Installation and Wiring
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
5-1 Processing at Power ON and Power OFF
5
5-1-2 Power OFF Operation
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.
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.
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.
Execution of the user program will continue if a momentary power interruption is less than the following
times.
Operation at Power OFF
Item Description
Power OFF detection
time
The time from when the power supply voltage drops until the CPU Unit starts pro-
cessing after the power interruption is confirmed. The CPU Unit continues to
operate normally until the power interruption is confirmed.
Momentary Power Interruption with Continued Operation
System reset
Voltage drop
Executing user program
Processing after power interruption is confirmed.
DC: 20.4 V max.
Power interruption confirmed.
System stops.
(CPU Unit stops.)
Power OFF detection time
2 to 8 ms
Voltage drop
DC: 20.4 V max.
Power
interruption
confirmed.
System stops.
(CPU Unit stops.)
Voltage
recovery
System reset Executing user program
Power OFF detection time
2 to 8 ms
Processing after power interruption is confirmed.
The CPU Unit will not interrupt
execution of user program
Momentary power interruption time
from voltage drop until recovery
Voltage drop
Executing user program
DC: 20.4 V max.
Power OFF detection time
2 to 8 ms
Voltage recovery
To Next Page
Loading...
Need help?
General
