User`s manual
Part names and settings of Qn(P)(R)(H)CPUs CPU modules
MELSEC System Q, Hardware 4 – 27
RUN LED Indicates the operating status of the CPU module.
ON: During operation with the RUN/STOP switch set to "RUN". Executes
sequence program operation.
OFF: During stop with the RUN/STOP switch set to "STOP". When an error
that stops operation is detected.
FLICKER: Parameters or programs are written with the RUN/STOP switch set
to "STOP" and then the RUN/STOP switch is turned from "STOP" to "RUN".
The CPU is not in "RUN" mode.
To turn on the RUN LED after writing the program, perform the following
operations:
- Set the RUN/STOP switch from "RUN" to "STOP" to "RUN".
- Reset with the RESET/L.CLR switch.
- Restart the programmable controller power.
To turn on the RUN LED after writing the parameters, perform the following
operations.
- Reset with the RESET/L.CLR switch.
- Restart the programmable controller power.
(If the RUN/STOP switch is set from "RUN" to "STOP" to "RUN" after chang-
ing the parameters, intelligent function module parameters will not be
updated.)
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 is detected that stops operation. (Flickers together
with the BOOT LED when automatic write to standard ROM is completed nor-
mally.)
USER LED Display of user messages:
ON: Error detected by CHK instruction or annunciator (F) turned ON
OFF: Normal
FLICKER: Execution of latch clear
BAT. LED Displays the status of the battery
ON: Battery error due to reduction in battery voltages of CPU module or
memory card.
OFF: Normal
BOOT LED Indication of boot operation
ON: Start of boot operation.
OFF: Non-execution of boot operation.
FLICKER: When automatic write to standard ROM is completed normally.
(The ERR. LED flashes too)
Module mounting
lever
This spring loaded lever simplifies disassembling of the module from the base
unit.
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.
USB connector Connector for connection with USB-compatible programming device.
(Not available for Q02CPU)
RS232 connector Connector for connecting a programming device (peripheral device) by RS232.
DIP switches
(System settings)
Used to set the items for operation of the CPU module. For the system protec-
tion and the valid parameter drives of the DIP switches, refer to section 4.4.2.
RUN/STOP switch Switch for setting the operation mode
RUN: Executes sequence program operation.
STOP: Stops sequence program operation.
RESET/L.CLR
switch
Switch for resetting the CPU and clearing the latches
RESET: Performs hardware reset, operation error reset, operation initializa-
tion or like. After performing reset, always return this switch to the neutral
position.
L.CLR: Latch Clear, used to turn "Off" or clear to "zero" all latch area data set
in the parameter.
Module fixing screw
hole
Hole for the screw used to fix to the base unit (M3x12 screw). (optional).
Module fixing latch Latch used to fix the module to the base unit.
Battery Backup battery for use of program memory, standard RAM, clock function and
the backup power time function.
Battery connector
pin
For connection of the battery lead wires. Lead wires are disconnected from the
connector when shipping to prevent the battery from consuming.
No. Name Application
Tab. 4-15: Part names of Q02(H)-, Q06H-, Q12(P)H- and Q25(P)HCPU