6
FUNCTIONS
6.4 PLC memory initialization
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6.4 PLC memory initialization
(1) What PLC memory initialization is
PLC memory initialization erases user data written in the CPU module.
When you initialize the PLC memory, data is returned to its factory settings.
After PLC memory initialization is executed, the system automatically resets
cancels the reset, then the initialization processing is executed again.
(2) Contents of PLC memory initialization processing
Table6.8 shows the contents of PLC memory initialization processing.
Diagram 6.9 PLC memory initialization operation overview
Table6.8 Contents of PLC memory initialization processing
Item
Contents of initialization processing
Program memory
The data is erased.(State in which not even one file exists)
Standard ROM
The data is erased.(State in which not even one file exists)
CPU access password
Not registered
Safety CPU operation mode Enters TEST MODE.
Operation
/
error history
After the history is erased, the following operation/error history is
recorded.
• OP005: SYSTEM INITIALIZE PLC MEMORY
• OP100: POWER ON
• 2200: MISSING PARAMETER
Clock data
Initializes to 2005/01/01 00:00:00.
ROM write count
2 is added
This selects execution of PLC
memory initialization with GX
Developer.
QSCPU
GX Developer
The QSCPU initializes the program memory, standard
ROM, CPU access password, the operation error
history, and the clock data.
QSCP
The QSCPU automatically
resets and cancels the reset.
QSCPU
OP100:POWER ON
2200:MISSING PARAMETER
Reset
reset cancel
Program
memory
Erase data
Standard ROM Erase data
CPU access
password
Set to no
password
Operation and
error history
After initialization to 0
incidents, record the
operation history*
*: OP005:SYSTEM INITIALIZE PLC MEMORY is recorded in the operation error history.
Clock data
Initialize to
2005/1/1 00.00.00
Execute PLC
memory initialization
Summary of Contents for MELSEC QS Series
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