Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 117

Processing details
■Integral operation processing
When the operation signal (INVLD) is FALSE, this function block performs integral operation to the value input from the input
variable IN and outputs the result from the output variable OUT_.
Condition Input (IN)
Operation Integral
signal time (T_)
(INVLD)
FALSE T_ > 0
Input (IN)
T_ = 0
Input (IN)
When the integral time (T_) after t2 is 0
T_  0
TRUE
Input (IN)
Operation signal (INVLD)
FALSE (Valid)
TRUE (Invalid)
T: Execution cycle
T_: Integral time (s)
IN: Input value
OUT_: Output value
OUT_ : Last output value
n-1
Ys: Initial output value
S: Laplace operator
■Operation signal
When the operation signal (INVLD) is FALSE: Integral operation is valid.
When the operation signal (INVLD) is TRUE: Integral operation is invalid.
t
t1
t
t2
t1
T_>0 T_=0
t
t1
Integral time Output (OUT_)
(T_)
T_ > 0
ΔT×IN
OUT_=
T_ = 0 OUT_ = OUT_

OUT_ = Ys
Integral Output (OUT_)
operation
1 Output (OUT_)
T_•S
1 Output (OUT_)
T_•S
Ys
Output (OUT_)
Ys
+OUT_
n-1
T_
n-1
t
t1
t
t2
t1
T_>0 T_=0
t
t1
8 CONTROL OPERATION
8.2 Integration (M+P_I)
8
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