User`s manual
Part names and settings of universal CPU modules CPU modules
MELSEC System Q, Hardware 4 – 33
No. Name Application
Cover for extension
cable connector
Protective cover for extension cable connector.
Remove this cover when connecting an extension base unit.
Base mounting hole
(∅ 5 mm)
Fixing holes (M4) for the base unit when not mounting on a DIN rail.
POWER LED Power indicator LED for 5 V DC.
Turns on in green during normal output of 5 V DC.
MODE LED Indicates the mode of the CPU module
ON: Q mode
OFF:
– Executional conditioned device test in process
– Forced on/off of external devices 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:
– 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 (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.
FLICKER (yellow): Battery error due to voltage drop of the CPU module bat-
tery.
OFF: Normal
Module connector Connector used for mounting an I/O or intelligent function module.
To the connector of the spare space where no module is mounted, fit the acces-
sory connector cover or the blank cover module (QG60) to prevent dust from
entering)
DIN rail adapter
mounting holes
Holes for mounting a DIN rail adapter.
Extension cable
connector
Connector for transferring signals to or from the extension base unit. Connect an
extension cable.
LG terminal Power filter ground
FG terminal Ground terminal connected with the shield pattern of the printed circuit board.
RUN/STOP/RESET
switch
RUN: Executes sequence program operation.
STOP: Stops sequence program operation.
RESET: Performs hardware reset, operation error reset, operation initializa-
tion or like.
Tab. 4-18: Part names of Q00UJCPU