Mitsubishi Electric Q01UCPU User Manual page 399

(c) File register size checking procedure
• Check the file register size used for each sequence program.
• Check the total file register size set in SD647 on the sequence program to see if there are sufficient
number of points to be used or not.
[Program example 1]
The file register range of use is checked at the beginning of each program.
SM400
<
M0
M0 Transfer command
[Program example 2]
The file register range of use is checked after execution of the QDRSET instruction.
SM400
<
M0
M0 Transfer command
[Program example 3]
When a block is switched to another:
SM400
<
M0
Block switching
M0 command
(3) Deleting a file register file
Delete an unnecessary file register file from "Delete PLC Data" of programming tool.
[Online]
4K points specified
SD647 K4
MOVP K4X20 R0
QDRSET "1:ABCD"
SD647 K4
MOVP K4X20 R0
SD647 K33
[Delete PLC Data]
Final file register
M0
range check
Y0
Alarm processing
Writing to file
register
Changing file register to
ABCD of Drive 1
Final file register
M0
range check
Y0 Alarm processing
Writing to file
register
Final file register
M0
range check
Y0
Alarm processing
RSET K1
Switching to block 1
CHAPTER 4 DEVICES
4
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