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6 INSTRUCTION LIST
6.2 Functions
6.2.1 I/O control instruction
Instruction
Category
Symbols
I/O control
instruction
S.IN
S.OUT1
S.OUT2
S.MOUT
S.DUTY
S.BC
S.PSUM
6 - 2
Table 6.2 I/O Control instruction
Symbol
Conducts the input data (PV)
Upper/lower limit check, input
limiter processing, engineering
S.IN
S1 D1 S2 D2
value conversion, and digital filter
processing.
Calculates the MV (0 to 100%)
from the input data (MV),
processes the upper and lower
S.OUT1
S1 D1 S2 D2
limit and Change rate limiter
processing, and conducts output
on time conversion.
Performs change rate,
upper/lower limiter processing
S.OUT2
S1 D1 S2 D2
and output on time conversion
from the input data (MV).
Reads the MV of the loop tag
memory and performs output
S.MOUT
S1 D1 S2 D2
conversion and alarm clear
processing.
Changes the ON/OFF rate within
a given cycle in proportion to the
S.DUTY
S1 D1 S2 D2
input data (0 to 100%) and
outputs the result.
Compares the input data with the
set value and outputs bit data as
S.BC
S1 D1 S2 D2
soon as the input data reaches
the set value.
Integrates the number of input
S.PSUM
S1 D1 S2 D2
pulses and outputs the result.
Number of
Processing Details
Basic Steps
MELSEC-Q
See for
Descript
ion
7
8- 1
8
8- 6
8
8-12
8
8-17
6
8
8-21
7
8-28
8
8-32
6 - 2
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