Mitsubishi Q00JCPU User Manual page 594

9
PARAMETERS
Process
(5) PLC RAS (2)
Note9.1
Item Parameter No.
Check
Memory
Program 3008
check
memory
Process
Note9.1
9
- 20 9.1 PLC Parameters
9.1.2 High Performance model QCPU, Process CPU, Redundant CPU, Universal model QCPU
Note9.1
Make the various settings for the RAS function in the Process CPU or Redundant
CPU.
his setting can be made only when the Redundant CPU or Process CPU is used.
Table9.16 PLC RAS (2) list
Description
Set whether the user area of the
program memory (except the
system area) will be checked for
data corruption or not.
H
When "Make program memory
check" is selected, set the
number of steps to be checked.
POINT
When checking all areas of the program memory, follow the procedure below to
calculate the number of steps for the check target.
• Check free space in the program memory using the PC call-up screen in
GX Developer. To do that, first format the program memory so that the
memory has no file written in it. (
• Use the following expression to obtain the number of steps for the check
target.
Number of steps for check targets
Check the version of the CPU module and GX Developer before making the settings for memory-
checking using the Process CPU.
Figure 9.16 PLC RAS (2)
Setting range
Do not make/Make program memory
check
Q12PHCPU, Q12PRHCPU: 1 to 496
points (256 to 124k steps)
Q25PHCPU, Q25PRHCPU: 1 to 1008
points (256 to 252k steps)
Section 5.1.2(3)(c)
All free space
=
( )
Appendix 4.3
Default value Reference
Do not make
program memory
check
Section 6.28
1 256 steps
)
4