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5 ADDED FUNCTIONS TO CORRESPOND TO A SAFETY
PROGRAMMABLE CONTROLLER
MELSOFT
5.2.4 PLC memory initialization
Admin. Develop. Users
SAFETY
TEST
: Can perform only when the safety CPU is in STOP.
[Purpose]
Initializes a safety CPU memory and returns it to the factory default.
(Refer to the following table for the processing contents of the initialization.)
[Operating Procedure]
Select [Online]
[Safety CPU operation] [PLC memory initialization].
[Dialog Box]
1)
Clicking the Yes
button initializes the safety CPU memory. (The following table
shows the contents of the initialization.)
For details, refer to the QSCPU User's Manual (Function Explanation, Program
Fundamentals).
Item Processing Contents
Program memory The data are deleted.
Standard ROM The data are deleted.
CPU access password Not set.
Safety CPU operation mode Switched to TSET MODE.
Operation/error log of a safety
CPU
After clearing the current logs, the operation log of PLC
memory initialization is written.
ROM write count The data are not deleted.
POINT
• PLC memory initialization can be used only when the safety CPU is in STOP.
• When PLC memory initialization has been completed, the safety CPU error LED
blinks.
For failure prevention, do not turn off the safety CPU power until the LED blinks.
• After initializing the programmable controller memory, set a CPU access
password first, and then writing data to the CPU.
• Use the "Format PLC memory" function when deleting only the data written in the
program memory.
The data other than program memory (Standard ROM, CPU access password,
safety CPU operation/error log, and ROM write count) retain the current status.
(For "Format PLC memory"
GX Developer Version 8 Operating Manual)