9 - 76
CHAPTER9 DEVICES
9
9.7 File Register (R)
9.7.6 Precautions for using the file register
[Program example 3]
When a block is switched to another:
(c) When using the SRAM card which stores file register for 1018K points or more
For the High Performance model QCPU whose serial number (first five digits) is "16021" or later, Process CPU,
and Redundant CPU, the file register up to the area of 2M bytes can be used. Even if the file register for 1018K
points or more is specified using parameter or instruction, a stop error will not occur.
(3) Deleting a file register file
To delete an unnecessary file register file, select [Online] [Delete PLC data] in GX Developer.
(4) Differences in the file register processing time among CPU module versions Note9.11Note11
When the serial number (first five digits) of the High Performance model QCPU is "02092" or later, if the file
register is specified by the serial number access method (ZR ) using an access instruction to the standard
RAM, more processing time will be required per instruction than that of the High Performance model QCPU
whose serial number (first five digits) is "02091" or earlier.
• Q02CPU: 1.1 s (average)
• QnHCPU: 0.65 s (average)
Table9.12 below shows processing times when the MOV instruction is used.
(Unit: s)
Figure 9.82 Program examples of file register checking
Note11
Table9.12 Differences in processing time between file register specification methods
Instruction
Q12HCPU Q02CPU
"02092" or later "02091" or earlier "02092" or later "02091" or earlier
MOV K0 R0 0.11 0.11 0.26 0.26
MOV K0 ZR0 3.55 2.88 7.71 6.64
SM400
M0
Y0
M0
Block switching
command
M0
RSET
K1
<
SD647 K33
Final file register
range check
Alarm processing
Switching to block 1
Note9.11
For the Basic model QCPU, Process CPU, and Redundant CPU, there are no differences in the file register processing
time among CPU module versions.
Basic
Process
Redundant
To Next Page
Loading...
Need help?
General
