Mitsubishi Electric FX3S Series User Manual page 126

FX /FX /FX
3S 3G 3GC
Built-in Positioning Functions
Programming using the "Instruction execution complete" flag and "Instruction execution abnormal
end" flag:
1) If two or more positioning instructions are used in a program, the "Instruction execution complete" flag
(M8029) or "Instruction execution abnormal end" flag (M8329) will be turned on or off after execution of
each instruction. However, if the "Instruction execution complete" flag (M8029) and "Instruction execution
abnormal end" flag are used together for a program, it is difficult to determine which instruction turns them
ON/OFF and the "Instruction execution complete" flag will not be turned on for the intended instruction.
 To use a positioning instruction at a position other than just below the instruction, refer to the
Good
example:
Bad
example:
B - 82
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/FX /FX PLC User's Manual - Positioning Control Edition
3U 3UC
The M8029 will function
as the "instruction
execution complete"
flag of DDRVI instruction.
instruction execution
The M8029 will function
as the "instruction
execution complete"
flag of DDRVA instruction.
instruction execution
M8029
The M8029 will function
as the "instruction
execution complete" flag Completion of
instruction
of the lower DDRVA
execution
instruction.
M8000
The M8029 will function
as the "instruction
X000
execution complete" flag
of the lower DSW
instruction.
The M8029 will function
as the "instruction
M8029
execution complete" flag
of the upper DDRVI
Compl-
instruction.
etion of instruction execution
search engine
M0
FNC158
K100000 K50000
DDRVI
M8029
RST
Completion
of instruction
execution
M8329
RST
Abnormal
completion of
M1
FNC159
K10000 K30000
DDRVA
M8029
RST
Completion
of instruction
execution
M8329
RST
Abnormal
completion of
RST
FNC 72
X10
DSW
M0
SET
M0
FNC158
K100000 K50000
DDRVI
FNC 22
D0
MUL
M1
FNC159
K10000 K30000
DDRVA
4 Before Programming
4.7 Items To Be Observed in Programming
example shown on the next page.
Y000 Y004
M0
M0
Y001 Y005
M1
M1
Program for upper DDRVI
M0
instruction
Y10 D0 K1
Y000 Y004
Upper DDRVI instruction
Program for DSW
K10 D20
instruction
Y001 Y005 Lower DDRVA instruction