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MELSEC-Q
7 FUNCTION
7.19 LED Display
The High Performance model QCPU has an LED to indicate the High Performance
model QCPU operation status on the front of the High Performance model QCPU.
The display details of each LED are described below.
7.19.1 LED display
(1) The details of the LED display are shown below:
LED name
Display Description
Mode
Indicates the High Performance model QCPU mode (Q mode/ A mode)
ON (green): Q mode (No registration of enforced ON/OFF for external I/O)
ON (orange): A mode
Flicker (green) : with registration of enforced ON/OFF for external I/O
RUN
Indicates the CPU module operation status.
On
: When operating with the RUN/STOP switch at "RUN".
Off
: When stopped with the RUN/STOP switch at "STOP".
Or when an error that stops operation is detected.
Flicker
: When writing parameters ad programs during STOP, and when setting the RUN/STOP switch
from [STOP]
[RUN]. Perform the following operations in order to illuminate the RUN LED after
program writing.
• Set the RUN/STOP switch to [RUN]
[STOP]
[RUN].
• Reset the system with the RESET/L. CLR switch.
• Switch on the power to the PLC again.
Perform the following operations in order to illuminate the RUN LED after parameter writing.
• Reset the system with the RESET/L. CLR switch.
• Switch on the power to the PLC again.
(When the RUN/STOP switch has been set to [RUN]
[STOP]
[RUN] after the parameters
have been amended, the parameters related to intelligent function modules and other network
parameters will not be reflected back.)
ERR.
Indicates the CPU module error detection status.
On
: When a self-diagnosis error that does not stop the operation (except for battery error) is
detected. (Set the operation error set mode to "continue" in the parameter mode PLC RAS
setting.)
Off
: Normal
Flicker
: When an error that stops the operation is detected.
When automatic write to standard ROM is complete normally (BOOT LED also flickers)
USER
The detection status for the CHK instruction or annunciator F status is indicated.
On
: When an error is detected with the CHK instruction, or when the annunciator is turned on.
Off
: Normal
Flicker
: When the latch clear is executed.
BAT.
Indicates the CPU module and Memory card battery status.
On
: When a battery error is detected due to low battery voltage.
Off
: Normal
BOOT
Indicates the execution status of the boot operation.
On
: When the execution is complete.
Off
: When not executed.
Fricker
: When automatic write to standard ROM is complete normally. (ERR. LED also flickers)
Содержание QCPU (Q Mode)
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