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4 - 3
4 Installation and Wiring
NX-series CPU Unit Hardware User’s Manual (W535)
4-1 Pro
cessing
at Po
wer ON an
d Po
wer OFF
4
4-
1-2 Pow
er OFF
Ope
ration
The following processing is performed during the
startup
status.
The system will immediately enter RUN mode if RUN mode (default) is set as the startup operating
mode. The system will immediately enter PROGRAM mode if PROGRAM mode is set as the startup
operating mode.
Different operations will be performed when the power is turned OFF depending on whether the power
interruption time is longer than the power OFF detection time, as described below.
The following table gives the voltage conditions for a power interruption.
Process
Description
Self diagnosis at startup
Operation is monitored for the following errors:
Power Supply
Error
,
CPU Unit Reset
,
CPU Unit Watchdog Timer Error
.
*1
*1. Refer to the
NJ/NX-series Troubleshooting Manual (Cat. No. W503)
for information on the following er-
rors:
Power Supply Error
,
CPU Unit Reset
, and
CPU Unit Watchdog Timer Error
.
Data check
The _
RetainFail
(Retention Failure Flag) system-defined variable
changes to TRUE at the following time: when the values of vari-
ables for which the Retain attribute was set to retain the values
were not retained after a power interruption.
Recording Power Turned ON and
Power Interrupted events
The Power Turned ON and Power Interrupted events are
recorded.
Operating Mode at Startup
4-1-2
Power OFF Operation
The NX-series Controller continues normal operation for a specific period of time even when a
momentary power interruption occurs. The Controller may therefore receive incorrect signals
from external devices that are affected by the momentary power interruption.
Take suitable actions, such as external fail-safe measures and interlock conditions, to monitor
the power supply voltage of the external devices as required.
•
RUN Mode Set as Startup Mode
•
PROGRAM Mode Set as Startup Mode
CPU Unit Startup
Time at Power ON
CPU Unit Startup
Time at Power ON
Operating mode
Power supply
RUN output on
Power Supply Unit
RUN mode
ON
RUN indicator
Operating mode
Power supply
RUN output on
Power Supply Unit
RUN indicator
Flashing
Lit
Startup
PROGRAM mode
OFF
Flashing
Not lit
Startup
WARNING
Содержание NX701-1620
Страница 11: ...9 Manual Structure NX series CPU Unit Hardware User s Manual W535...
Страница 46: ...Sections in this Manual 44 NX series CPU Unit Hardware User s Manual W535...
Страница 64: ...1 Introduction to NX series Controllers 1 18 NX series CPU Unit Hardware User s Manual W535...
Страница 72: ...2 System Configuration 2 8 NX series CPU Unit Hardware User s Manual W535...
Страница 90: ...3 Configuration Units 3 18 NX series CPU Unit Hardware User s Manual W535...
Страница 156: ...6 Inspection and Maintenance 6 14 NX series CPU Unit Hardware User s Manual W535...
Страница 163: ...I 1 I NX series CPU Unit Hardware User s Manual W535 Index...
Страница 166: ...I 4 NX series CPU Unit Hardware User s Manual W535 Index...
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