6 PID CONTROL INSTRUCTION
6.2 PID Control Instruction (Exact Differential)
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6
*1 For the PID operational expression set in the operational expression selection, refer to the following.
MELSEC-Q/L/QnA Programming Manual (PID Control Instructions)
Precautions
The following table shows the CPU modules applicable to the PID control instructions (inexact differential) and the PID control
instructions (exact differential).
: Applicable,
: Not applicable
(s)+(m+0)
Operational
expression
selection
The same as Setting data for No. 1 loop
m=(n-1)
10+2
n: number of loops
(s)+(m+1)
Sampling cycle
(T
S
)
(s)+(m+2)
Proportional
constant (K
P
)
(s)+(m+3)
Integral constant
(T
I
)
(s)+(m+4)
Derivative constant
(T
D
)
(s)+(m+5)
Filter coefficient (
)
(s)+(m+6)
MV lower limit
(MVLL)
(s)+(m+7)
MV upper limit
(MVHL)
(s)+(m+8)
MV change rate
limit (
MVL)
(s)+(m+9)
PV change rate
limit (
PVL)
CPU module model
Inexact differential
Exact differential
Basic model QCPU
The first five digits of the serial number are '04121' or lower.
The first five digits of the serial number are '04122' or higher
High Performance model
QCPU
The first five digits of the serial number are '05031' or lower.
The first five digits of the serial number are '05032' or higher.
Redundant CPU
Universal model QCPU
LCPU
Device
Data item
Description
Setting range
Setting
side
Processing when the
setting data are outside
the setting range
With PID limits
Without PID
limits
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