User`s manual
Part names and settings of universal CPU modules CPU modules
MELSEC System Q, Hardware 4 – 39
No. Name Application
Module fixing hook Hook used to fix the module to the base unit.
MODE LED Indicates the mode of the CPU module
ON: Q mode
OFF:
– Executional conditioned device test is in process
– Forced on and off function for external I/O is in process
– CPU module change function with memory card is in process
RUN LED Indicates the operating status of the CPU module.
ON: The PLC operates the program with cyclic processing (RUN status).
OFF: During stop with the RUN/STOP/RESET switch set to "STOP". When an
error that stops operation is detected.
FLICKER: When parameters or a program is written during STOP and the
RUN/STOP/RESET switch is moved from "STOP" to "RUN". The CPU is not
in "RUN" mode.
To turn on the RUN LED after writing the program, perform the following oper-
ations:
– Shift the RUN/STOP/RESET switch from "RUN" to "STOP" to "RUN".
– Perform reset with the RUN/STOP/RESET switch (refer to section 4.5.3).
– Power on the programmable controller again.
To turn on the RUN LED after writing the parameters, perform the following
operations.
– Perform reset with the RUN/STOP/RESET switch.
– Power on the programmable controller again.
(If the RUN/STOP/RESET switch is shifted from "STOP" to "RUN" to "STOP"
to "RUN" after changing the parameter values, the new values are not reflec-
ted on the parameters related to the intelligent function module, such as the
network parameters.)
ERR. LED Error indication
ON: When the self-diagnostic error that will not stop operation is detected
(continuation of operation at error detection must be set in the parameter).
OFF: Normal
FLICKER:
FLICKER:
– When an error that stops operation is detected.
– When reset operation is performed with the RUN/STOP/RESET switch.
USER LED Display of user messages:
ON: Annunciator ( F) turned on
OFF: Normal
BAT. LED Display of user messages:
ON (yellow): Battery error due to battery voltage drop of the memory card.
FLICKER (yellow): Battery error due to voltage drop of the CPU module bat-
tery.
ON (green): Turned on for 5 seconds after restoring of data backed up to the
standard ROM by the latch data backup is completed.
FLICKER (green): Flashes when backup of data to the standard ROM by
latch data backup is completed.
OFF: Normal
BOOT LED Indication of boot operation
ON: Start of boot operation
OFF: Non-execution of boot operation
100M LED Transfer speed display of the ETHERNET interface
ON: Connected at 100 Mbps
OFF:
– Connected at 10 Mbps
– Not connected
SD/RD LED Status display of the ETHERNET interface
ON: Data being sent/received
OFF: No data being sent/received
Memory card
EJECT button
Used to eject the memory card from the CPU module.
Memory card install-
ing connector
Connector used for installing the memory card to the CPU module.
Tab. 4-20: Part names of Q02UCPU, Q03UD(E)CPU and QUD(E)HCPU