User`s manual

Part names and settings of Qn(P)(R)(H)CPUs CPU modules
MELSEC System Q, Hardware 4 – 23
No. Name Application

POWER LED Power indicator LED for 5 V DC. Turns on in green during normal output of
5 V DC.

RUN LED Indicates the operating status of the CPU module.
 ON: During operation with the RUN/STOP/RESET switch set to "RUN".
Executes 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.

Base mounting hole This hole is for fixing the Q00JCPU with a screw.

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
 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.
Tab. 4-13: Part names of Q00JCPU