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4.2 Basic Model QCPU
4.2.2 Switch Operation at the Time of Writing Program
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HARDWARE SPECIFICATIONS OF THE CPU MODULE
4.2.2 Switch Operation at the Time of Writing Program
Programs can be written to the Basic model QCPU in either the STOP or RUN status.
(1) When writing program with RUN/STOP/RESET switch set to "STOP"
When writing a program with the Basic model QCPU placed in the STOP status using
the RUN/STOP/RESET switch, operate the switch in the following procedure.
1) RUN/STOP/RESET switch: STOP
RUN LED: OFF, from CPU module STOP status to Program write
2) RUN/STOP/RESET switch: Perform reset.( Section 4.2.3)
3) RUN/STOP/RESET switch: STOP to RUN
RUN LED: ON, CPU module RUN status
(2) When it is desired to place the Basic model QCPU in RUN status without
resetting it after program write
Operate the RUN/STOP/RESET switch from STOP to RUN, STOP and then RUN.
After the second STOP to RUN operation, the CPU module is put in the RUN status.
At this time, the device memory data are those saved before program write.
(3) When writing program after remote STOP using GX Developer
When writing a program with the Basic model QCPU stopped by remote STOP using
GX Developer, no operation is needed for the RUN/STOP/RESET switch.
When remote RUN is performed using GX Developer, the Basic model QCPU is
placed in the RUN status.
(4) When performing online change of program
When the online change of a program is performed, the RUN/STOP/RESET switch
need not be operated.
POINT
The program modified online during boot operation is written to the program
memory.
After making online program change, also write the program to the standard ROM
of the boot source memory. If the program is not written in the standard ROM, 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 (Function Explanation, Program Fundamentals)
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