Hardware Operation; Switch Operation After A Program Is Written To The Cpu Module - Mitsubishi MELSEC L Series User Manual

6.3

Hardware Operation

This section describes the hardware operation of a CPU module.
6.3.1

Switch operation after a program is written to the CPU module

This section describes the switch operation after a program is written to the CPU module.
(1) When a program is written to the CPU module in the STOP status
(a) Run the CPU module, clearing data in the device memory
Reset the CPU module. (
(b) Run the CPU module, retaining data in the device memory
(2) When a program is written to the CPU module in the RUN status (online
*1
change)
The switch operation is not required. Data in the device memory is not cleared.
*1 When a program is written to the program memory during boot operation, write the same program to the boot source
memory. If not written, an old program will be executed at next boot operation.
For details on the boot operation, refer to the following.
MELSEC-L CPU Module User's Manual (Function Explanation, Program Fundamentals)
When a program is written to the CPU module which has been stopped by the remote STOP operation from a programming
tool, the CPU module runs by the remote RUN operation from the programming tool. Therefore, the switch operation is not
required.
For details on the programming tool, refer to the following.
Operating manual for the programming tool used
64
Page 65, Section 6.3.2)
RUN/STOP/RESET
switch
Flashing
RUN/STOP/RESET
switch
RUN/STOP/RESET
switch
1.
Set the RUN/STOP/RESET switch to the RUN
position.
2.
Check that the RUN LED flashes.
3.
Set the RUN/STOP/RESET switch to the STOP
position.
4.
Set the RUN/STOP/RESET switch to the RUN
position again.
*1