Mitsubishi Q Mode, Programming Manual

Page: 26 / 126

3 - 6
MELSEC-Q/QnA
3. PID CONTROL SPECIFICATIONS
A PID control instruction list is given in Table 3.2.
Table 3.2 PID Control Instruction List
Category
Instruction
Symbol
Ladder Format Processing Details
Execution
Condition
Number
of Basic
Steps
Subset
Processing
Page
S.PIDINIT S
PID
Control
data
setting
S.PIDINIT
SP.PIDINIT S
Sets the PID control data stored
in the word device (designated
by
S
).
Common data
setting area
For loop 1
For loop 2
For loop n
S
+ 1
S
+ 2
to
S + 15
S
+ 16
S
+ 29
to
S
+ (m+0)
to
S
+ (m+13)
to
S + 0
m=(n-1) 14+2
7 8-2
S.PIDCONT S
PID
operation
S.PIDCONT
SP.PIDCONT S
Executes PID operation with
the SV (set value) and the PV
(process value) designated by
S
and stores the PID
operation results in the MV
(manipulated value) area of the
word device designated by
S
.
to
S
+ 9
SV setting area
For
loop 2
For
loop n
PV setting area
MV value storage area
For
loop 1
SV setting area
PV setting area
SV setting area
PV setting area
MV value storage area
Common data
setting area
S + 10
to
S
+ 32
S + 33
to
S + 55
S
+ (m+0)
to
S + (m+22)
MV value storage area
S
m=(n-1) 23+10
7 8-3
S.PIDSTOP n
Operation
stop
S.PIDSTOP
SP.PIDSTOP n
Stops the PID operation at the
loop number designated by
n
.
7 8-5
S.PIDRUN n
Operation
start
S.PIDRUN
n SP.PIDRUN
Starts the operation at the loop
number designated by
n
.
6 8-5
S.PIDPRMW n S
Parameter
change
S.PIDPRMW
SP.PIDPRMW n S
Changes the operation
parameter for the loop number
designated by
n
to the PID
control data stored in the word
device designated by
S
8 8-6