Index Qualification; Basic Loop Types Available By Combinations Of Process Control Instructions - Mitsubishi Electric MELSEC-Q QnPHCPU Programming Manual

2 STRUCTURE AND COMBINATIONS OF PROCESS CONTROL
INSTRUCTIONS

2.2.8 Index qualification

Index qualification usable with the process control instructions is the same as the one usable with
the basic instructions of the QnPHCPU/QnPRHCPU.
2.3 Basic Loop Types Available by Combinations of Process Control
Instructions
Loop type
2-degree-of-freedom PID control
(S2PID)
PID control
(SPID)
PIDP control
(SPIDP)
Sample PI control
(SSPI)
I-PD control
(SIPD)
Blend PI control
(SBPI)
Ratio control
(SR)
2-position ON/OFF control
(SONF2)
3-position ON/OFF control
(SONF3)
2 - 5
Structure
SET
SV
PV
S.PHPL
S.IN S.2PID
INPUT
SET SV
PV
S.IN S.PHPL S.2PID
INPUT
SET SV
PV
S.IN S.PHPL S.PID
INPUT
SET SV
PV
S.IN S.PHPL S.PID
INPUT
SET SV
PV
INPUT S.IN S.PHPL S.PIDP
SET SV
PV
S.IN S.PHPL S.SPI
INPUT
SET SV
PV
S.IN S.PHPL S.IPD
INPUT
SET SV
PV
INPUT S.IN S.PHPL S.BPI
SET SV
PV
S.IN S.PHPL S.R
INPUT1
SET SV
PV
S.IN S.PHPL S.ONF2
INPUT
SET SV
PV
S.IN S.PHPL S.ONF3
INPUT
MV
Used for general PID control (2-degree-of-
S.OUT1
OUTPUT
freedom). (velocity type)
Conducts PID operations for each control
cycle.
MV
S.DUTY
OUTPUT
MV
Used for general PID control. (velocity
S.OUT1
OUTPUT
type)
Conducts PID operations for each control
cycle.
MV
S.DUTY
OUTPUT
Used for general PID control. (Position
type)
MV
Conducts PID operation for each control
OUTPUT
cycle.
Used for a process that has long dead
time.
PI control is executed for only the period of
MV
control execution time in each control
S.OUT1
OUTPUT
cycle and the output is kept constant after
that.
Used to make slow response so that the
operation end and process are not given
MV
impact when the set value is varied.
S.OUT1
OUTPUT
Used for a process where the manipulated
value may vary in a short period of time
MV
and may be constant in a long period of
S.OUT1 OUTPUT
time.
Control is performed to keep constant the
ratio of the given manipulated value to the
MV
other varying value.
S.OUT2
OUTPUT
Depending on the sign (positive/negative)
MV
of a deviation, operation to turn the
manipulated value ON or OFF is
OUTPUT
performed.
3-position ON/OFF control outputs signals
MV
of three areas in response to the process
value to carry out control.
This control can suppress the sudden
OUTPUT
variation of the manipulated value.
MELSEC-Q
Application
2 - 5