Mitsubishi 00JCPU, Руководство пользователя

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CHAPTER8 PARAMETERS
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2
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8
8.1 PLC
P
a
rameter
s
8.1.2 H
igh
P
er
forman
ce mod
el QCPU, Pr
ocess CPU, and
Redundant
CPU
(5) PLC RAS(2)
Note8.2
Note2
Parameters required for performing the RAS functions in the Process CPU and Redundant CPU are set.
When checking all areas in the program memory, the number of steps to be checked can be calculated by the following
procedure.
• On the Read from PLC screen, check the size of total free area in the program memory.
Before checking the size, confirm that the program memory is formatted and no file is written in the memory.
(
Section 5.2.2)
• Calculate the number of steps with the following expression.
Note2
Figure 8.16 PLC RAS(2)
Table8.16 PLC RAS(2) setting list
Item
Parameter
No.
Description Setting range Default
Refer-
ence
Memory
check
Check
Program
memory
3008
H
Set whether to check the user area
in the program memory (excluding
system areas) for data corruption.
Selected/deselected Deselected
Section
6.27
Enter the number of steps to be
checked when "Check Program
memory" is selected.
Q12PHCPU and Q12PRHCPU:
1 to 496 points (256 to 124K steps)
Q25PHCPU and Q25PRHCPU:
1 to 1008 points (256 to 252K steps)
1 256 step
Note8.2
The High Performance model QCPU does not support the memory check function.
When using the memory check function in the Process CPU, check the versions of the CPU module and GX
Developer. ( Appendix 2.3)
High
performance
Process
Total free area size
(bytes)
Number of steps to be
checked
4