Mitsubishi Q02HCPU - Page 525

9
DEVICE EXPLANATION
9.7 File Register (R)
9.7.6 Precautions for using file registers
9
- 74
9
Device Explanation
10
CPU Module Processing Time
11
Procedure for Writing Program to CPU Module
AppendicesIndex
3) Checking the file register capacity
• Check The file register capacity used for each sequence program.
• Determine if the file register capacity exceeds the number of points used,
on the basis of the total file register capacity set in SD647 in the sequence
program.
[Program example 1]
The file register "range of use" is checked at the beginning of each program.
[Program example 2]
The file register "range of use" is checked after executing the QDRSET instruction.
[Program example 3]
For block switching.
(c) File register file deletion
Choose [Online] [Delete PLC data] on GX Developer to delete the unnecessary
file register file.
Diagram 9.76 File register checking program example
SM400
M0
Y0
M0
Transfer command
M0
MOVP K4X20 R0
<
SD647 K4
Designates 4k points
Final file register
range check
Writing to file
register
Alarm processing
SM400
M0
Y0
M0
Transfer command
M0
MOVP K14X20 R0
<
SD647 K4
QDRSET "1:ABCD"
Final file register
range check
File register is changed
to drive 1 ABCD.
Writing to file
register
Alarm processing
SM400
M0
Y0
M0
Block switching command
M0
RSET K1
< SD647 K33
Final file register
range check
Alarm processing
Switching to block 1