Mitsubishi Electric MELSEC-Q series Programming Manual page 39

Setting Data Data Item
data No.
Data for 1 Selection of
each loop operational
expression
2 Sampling
cycle (T )
S
3 Proportional
constant (K
P
4 Integral
constant (T )
I
5 Derivative
constant (T
D
6 Filter
coefficient ()
7 MV Lower
limit (MVLL)
8 MV Upper
limit (MVHL)
Description Incomplete derivative
With PID limits
Setting
Range
Selects the PID Forward
operational expression operation: 0
indicated in Section Reverse
3.1.2/Section 3.2.2. ( operation: 1
Page 15 Operation
expressions,  Page
21 Operation
expressions)
Sets the cycle of PID 0.01 to
operation. 60.00s
PID operation 0.01 to
) Proportional gain 100.00
This constant expresses 0.1 to
the magnitude of the 3000.0s
integral operation (I
Infinite()
operation) effect.
(If the setting
Increasing the integral
for T
constant slows down the
exceeds
manipulated value
3000.0 s)
change.
This constant expresses 0.00 to
) the magnitude of the 300.00s
derivative operation (D
operation) effect.
Increasing the derivative
constant causes a
significant change in the
manipulated value even
with slight change of the
control objective.
Sets the degree of 0 to 100%
filtering applied to the
process value.
The filtering effect
decreases as the value
gets closer to 0.
In the automatic mode, -50 to 2050
sets the lower limit for the
MV (manipulated value)
calculated in PID
operation.
When the MV is less than
the MV lower limit, the
MVLL is used as the MV.
In the automatic mode, -50 to 2050
sets the upper limit for
the MV calculated in PID
operation.
When the MV is greater
than the MV upper limit,
the MVHL is used as the
MV.
Without PID limits
User Setting
Specification Range
Range
0 or 1 Forward
operation: 0
Reverse
operation: 1
1 to 6000 0.01 to 60.00s
(unit: 10 ms)
1 to 10000 0.01 to 100.00
(unit: 0.01)
1 to 32767 0.1 to 3000.0s
(unit: 100 ms)
Infinite()
(If the setting
for T exceeds
I I
3000.0 s)
0 to 30000 0.00 to
(unit: 10 ms) 300.00s
0 to 100 0 to 100%
-50 to 2050 -32768 to
32767
-50 to 2050 -32768 to
32767
Processing
when Set Data
is Outside the
User
Allowable
Specification
Setting Range
Range
0 or 1 An error occurs
and PID operation
for the
corresponding
loop is not
executed.
1 to 6000
(unit: 10 ms)
1 to 10000
(unit: 0.01)
1 to 32767 An error occurs
(unit: 100 ms) and PID operation
for the
corresponding
loop is not
executed.
0 to 30000 An error occurs
(unit: 10 ms) and PID operation
for the
corresponding
loop is not
executed.
0 to 100
-32768 to In the case of
32767 "with PID limits",
PID operation is
performed after
conversion into
the following
value.
• When the MVLL
or MVHL value
-32768 to
is less than -50,
32767
"-50" is used.
• When the MVLL
or MVHL value
is greater than
2050, "2050" is
used.
5 PID CONTROL PROCEDURE
5.1 PID Control Data
5
37