Omron NX Series Hardware User Manual

Indicator Color Status Meaning
POWER Green Lit. Power is ON.
Not lit. Power is not ON. Or, the power supply voltage is outside the al-
lowable voltage range.
RUN Green Lit. The CPU Unit is in normal operation in RUN mode. (The user
program is in execution.)
Flashing
at 2-s inter-
vals, then
flashing at
0.5-s inter-
vals.
The CPU Unit is starting (entering RUN mode or PROGRAM
mode at startup).
Flashing
at 2-s inter-
vals contin-
ues for 30
seconds or
longer
.
System initialization error occurs.
Not lit. Operation is stopped in PROGRAM mode, when a CPU Unit
reset is in progress, or when any of the following errors occurs.
• Controller error in the major fault level
• CPU error (WDT error)
ERROR Red Lit. Self-diagnosis found one of the following errors.
• Controller error in the major fault level
• CPU error
Flashing
at 1-s inter-
vals.
Self-diagnosis found one of the following errors.
• Controller error in the partial fault level (an error in which all
control of a Function Module is disabled)
• Controller error in the minor fault level (an error in which par-
tial control of a Function Module is disabled)
CPU Unit operation will continue for either of these errors.
Operation will stop for the Function Module in which a Control-
ler error in the partial fault level occurred.
Operation will continue for the Function Module in which a
Controller error in the minor fault level occurred.
Not lit. The CPU Unit is in normal operation, a CPU reset is in prog-
ress, or monitored information occurred (CPU Unit
operation
will continue.).
BUSY Yellow
Flashing Built-in non-volatile memory access in progress.
Not lit. Other than the above.
SD PWR Green
Lit. Power is being supplied to the SD Memory Card and the SD
Memory Card can be used.
Flashing
A backup, restore or verification operation is in progress.
*1
Not lit. The power supply for the SD Memory Card is stopped, an SD
Memory Card is not mounted, or the file format of the mounted
SD Memory Card is not supported.
3 Configuration Units
3-7
NX-series NX502 CPU Unit Hardware User's Manual (W629)
3-1 CPU Units
3
3-1-4 Operation Status Indicators

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English