Filter
Top Products
6.2 PID Control Instruction (Exact Differential)
6.2.2 PIDCONT instruction
6-23
PIDCONT
6
PID CONTROL
INSTRUCTION
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 MVMAN 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)
–––
to
+27
s
s
s
15
to
b
b2
b1
b0
If PV variation
is outside the
limit range,
'1' is set.
If MV variation
is outside the
limit range,
'1' is set.
s
s