5.6 PID Control Instruction (Exact Differential)
5.6.2 PIDCONT instruction
5-181
5
QCP
U
IN
S
T
RUCTI
O
N
DE
TA
IL
S
PIDCONT
PIDCONT
Device
Data name
Description
Setting range
Setting
side
Processing when the
setting data are outside
the setting range
With PID
limits
Without PID
limits
+14
Manual
manipulated
value
MV
MAN
• Store the data output
from the D/A
conversion module in
manual operation.
-50 to 2050
-32768 to
32767
User
In the case of "With PID
limits", the PID operation is
performed after values are
replaced as follows:
• If MV
MAN
is less than
-50, the value is clipped
to -50.
• If MV
MAN
is greater than
2050, the value is
clipped to 2050.
+15
Manual/
automatic
selection
MAN/
AUTO
• Select whether the
output to the D/A
conversion module is
a manual manipulated
value or an automatic
manipulated value.
• In manual operation,
the automatic
manipulated value
remains unchanged.
0: Automatic manipulated
value
1: Manual manipulated
value
User
When other than 0 or 1 is
selected, an error occurs
and the operation for the
corresponding loop is not
performed.
+16
Alarm
ALARM
• Used to determine if
the change rate of the
MV (manipulated
value) and the PV
(process value) is
within or outside the
limit value range.
• Once set, the alarm
data are maintained
until the user resets it.
• When the MV
variation is outside
the limit range, bit 1
(b1) is set to '1'.
• When the PV
variation is outside
the limit range, bit 0
(b0) is set to '1'.
User
System
–
+17
PID control work area
(reserved by the system)
–
–
–
+27
S
S
S
1
5
to
b
b
2
b
1
b0
I
f
PV
v
aria
t
i
on
is
out
sid
e
the
limi
t
ra
nge
,
'1' is s
et
.
I
f
M
V
v
aria
t
i
on
is
out
sid
e
the
limi
t
ra
nge
,
'1' is s
et
.
S
to
S
Содержание QCPU
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