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MELSEC-Q
1 GENERAL DESCRIPTION
(1) When created with MELSAP-L and ladders
(a) MELSAP-L side
The flow of operation is easy to understand by
creating the SFC program related to the interlock
conditions.
(b) Sequence programs side
The area can be developed into a product by
creating interlock conditions irrelevant to the flow of
operation.
aX0
Start
oM70
Ascent
aX1
Upper limit
oM80
Descent
aX2
Lower limit
Machine operation sequence
Y10
Y11
Ascent Descent
Upper
limit
Emergency
stop
Descent
Ascent
Can be created
as a part
Control of machine
Describe steps
and complicated
interlock conditions
using a ladder.
Step
AscentDescent
Lower
limit
Emergency
stop
(2) Description format with MELSAP-L
MELSAP-L display screen
The description format in the step and transition
conditions with MELSAP-L is shown b.
(Example)
T0
K30
DM0V K10 W0
oT0 K30
X0
X1
C0 X1
M0 C0
T0
aX0
bX1
aC0&bX1
(aM0 bT0)&aC0
DMOV K10 W0
oM0
M0
ransition conditions
Step
Commands equivalent to contacts cannot be
described in the step.
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