5
MEMORIES AND FILES USED IN CPU MODULE
5.1 Basic Model QCPU
5.1.5 Standard ROM program execution (boot run) and writing
5 - 13
1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
3) Write to standard ROM by GX Developer
• Choose [Online] [Write to PLC] on GX Developer and write the files to
the program memory.
• Choose [Online] [Write to PLC (Flash ROM)] [Write the program
memory to ROM...] on GX Developer, and write to the standard ROM the
files written to the program memory. ( (2) in this section)
4) Program execution
Resetting with the RUN/STOP/RESET switch of the Basic model QCPU boots
the program from the standard ROM.
5) Check for normal boot completion
Whether the boot is normally completed or not can be checked by the special
relay (SM660) status.
Refer to Appendix 1 for the special relay.
(c) Operation to stop boot run
Perform the following operation using GX Developer to stop boot run and execute
operation by the parameter program written to the program memory.
1) Format the program memory.
2) Choose [Online] [Write to PLC (Flash ROM)] [Write the program memory
to ROM...].
(Parameters and sequence program data in the standard ROM are cleared.)
3) Write parameters and sequence program data to the program memory.
(d) Precautions for standard ROM program execution
1) Files stored into standard ROM
Before executing boot run, store the following files into the standard ROM.
• Parameter
*1
• Intelligent function module parameter
• Program
*2
• Device comment
• Device initial value
* 1 : Must be stored into the standard ROM.
* 2 : Any of the sequence program, ST program and SFC program is necessary.
2) Online change during boot run
If online change is made to a program in the program memory during boot run
from the standard ROM, the change is not updated on the program in the boot
source standard ROM.
Hence, write the program to the standard ROM ( (2) in this section) when
the CPU module is put in a STOP status.
3) When program memory contents change at power OFF ON or reset
If the sequence program written to the program memory changes when the
PLC is powered ON or reset, boot run may be in execution.
Refer to "(1)(c)Operation to stop boot run" in this section, and stop the boot
run.
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