User`s manual
Part names and settings of Qn(P)(R)(H)CPUs CPU modules
MELSEC System Q, Hardware 4 – 25
No. Name Application
Module fixing hook Hook used to fix the module to the base unit.
RUN LED Indicates the operating status of the CPU module.
ON: During operation with the RUN/STOP/RESET switch set to "RUN". Exe-
cutes sequence program operation.
OFF: During stop with the RUN/STOP/RESET switch set to "STOP". When an
error that stops operation is detected.
FLICKER: When parameters/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/parameters, perform the fol-
lowing operations.
- Perform reset with the RUN/STOP/RESET switch.
- Set the RUN/STOP/RESET switch from "STOP" to "RUN".
To turn on the RUN LED after writing the program/parameters without per-
forming a reset, perform the following operation:
- Set the RUN/STOP/RESET switch from "STOP" to "RUN" to "STOP" to
"RUN".
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.
Module mounting
lever
This spring loaded lever simplifies disassembling of the module from the base
unit.
Battery Backup battery for use of the program memory, standard RAM, clock function
and 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.
RUN/STOP/RESET
switch
Switch for setting the operation mode
RUN: Executes sequence program operation.
STOP: Stops sequence program operation.
RESET: Performs hardware reset, operation error reset, operation initializa-
tion or like.
RS232 connector Connector for connecting a programming device (peripheral device) by RS232.
Module fixing screw
hole
Hole for the screw used to fix to the base unit. (M3x12 screw)
Module fixing latch Latch used to fix the module to the base unit.
Tab. 4-14: Part names of Q00CPU and Q01JCPU