Mitsubishi Electric melsec-k Programming Manual page 30

4-3-7. SET, RST
...
Flip-flop set, reset
Flip-flop set and reset are effective for the following 3 types
of
devices:
output
Temporary memory
Failure memory
Y
M
F
13 l o t ;
Y
( C )
Fig. 4-16. SET, RST instructions
(However, reset is available for counters C.)
(Coding)
(1) Output (Y) set, reset
10
L D XO2
I1
S E T
Y l O
12
L D
Xo5
13 R S T Y i o
(2) Temporary memory (M) set, reset
10 L D XO2
11
ssrr
MOO
12 L D Xo5
13 R S T M O O
For M, Y, and F, self-holding circuits by normal sequence circuits are also possible, but the
functions may be understood more easily in the above way. Please compare with the normal
(3) Failure memory (F) set, reset
10
L D XO2
11
S E T F O O
12
L D
XW
13
R S T F O O
method.
Xo6
' P F i g . :-17. :holding
c i y ~
Y l O
r+
Fig. 4-17. Self-holding circuit
(Coding).
10
L D
x
02
11
O R Y
10
12
A N I
X05
13 OTJT
YlO
When flip-flop holding is required at the time of power failure, output Y l a t c h g becomes poss
-
ble for the decided range by connecting a
latch unit to the input/output unit connector and selec-
ting 16/32/64 points by switching. [Refer to 5-2-9.(1).]
K2CPU is provided with a switch enabling to hold M collectively in the case of power failure.
[Refer to 5-2-9.(2).]
(3) Counter (C) preset value resetting is also possi-
I
O U T
C
06
1 -
R S T
20
ble by RST instructions.
24
Fig. 4-18. Counter circuit
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