System Protect - Mitsubishi Q2ACPU User Manual

9. MAINTENANCE FUNCTION
9.5

System Protect

QnACPU features a number of functions that protect against program changes ("system
protect") by restricting general data processing (access processing from GPP functions,
serial communication modules, etc.) by third parties other than designers.
The following system protect functions are available.
Target Protection Valid File for Protection
Whole of CPU module All files
Memory card units All files
Drive units Parameter program
File units All files
Control instruction
Read/write display Operations of program read/write
Write
Description
Batch prohibition of write/control to
the CPU module.
Establishes write protect for the
memory card and prohibits writing.
Registers entry codes for the
following settings in relation to a
specific drive (Example: Built-in
RAM):
1) Prohibiting read/write display
2) Prohibiting writing
Changes attributes file for each file
as follows:
1) Prohibiting read/write display
2) Prohibiting writing
* "Control direction", "read/write display" and "writing" in the table above have the following
meanings:
Item
CPU module operation instruction by remote operation(Remote RUN, Remote STOP, etc.)
Operations that involve write processing, such as program write and test.
Method
Turn ON SW5 of system
setting switch 1 on the main
CPU module. (Refer to Section
15.2.)
Turn ON the memory card's
write protect switch. (Refer to
Section 18.5.)
Register password.
(Refer to Section 9.6.)
Change file attributes by
password registration.
(Refer to Section 9.6.)
Description
9 - 11
Valid Timing Remark
Valid for
Always
devices
Always
Always
Always