4 - 42
4.4 Universal Model QCPU
4.4.2 Switch Operation at the Time of Writing Program
4
HARDWARE SPECIFICATIONS OF THE CPU MODULE
4.4.2 Switch Operation at the Time of Writing Program
This section explains the switch operation to be performed after a program is written using
GX Developer.
(1) When writing program with CPU module set to "STOP"
*1
(a) To set to RUN status with device memory data cleared
1) Move the RUN/STOP/RESET switch to the RESET position once
(Approximately 1 second) and return it to the STOP position.
2) Set the RUN/STOP/RESET switch to the RUN position.
3) The CPU module is placed in the RUN status (RUN LED: ON).
(b) To set to RUN status with device memory data not cleared (held)
1) Set the RUN/STOP/RESET switch to the RUN position.
2) The "RUN" LED flashes.
3) Set the RUN/STOP/RESET switch to the STOP position.
4) Setthe RUN/STOP/RESET switch to the RUN position again.
5) The CPU module is placed in the RUN status (RUN LED: ON).
(2) When a program is written while CPU module is running (online
change)
*2
No operation is needed for the RUN/STOP/RESET switch of the CPU module. At this
time, the device memory data are not cleared.
* 1: When a program was written to the program memory during boot operation, also write the
program to the boot source memory.
If the program is not written to the boot source memory, the old program will be executed at the
next boot operation.
* 2: When online change is performed in the ladder mode, the program changed online is written to
the program memory.
When performing boot operation, also write the program to the boot source memory after online
change. If the program is not written to the boot source memory, the old program will be executed
at the next boot operation
For details of the boot operation, refer to the manual below.
QCPU User's Manual (Functional Description, Program Fundamentals)
POINT
When the CPU module is placed in the STOP status by the remote STOP
operation of GX Developer, it can be put in the RUN status by the remote RUN
operation of GX Developer after program write.
In that case, No operation is needed for the RUN/STOP/RESET switch of the
CPU module.
For details of GX Developer, refer to the manual below.
GX Developer Operating Manual