Mitsubishi MELSEC-L series Programming Manual page 301

Device Data name
Manual/
MAN/
automatic
+15
s
AUTO
selection
Alarm ALARM
+16
s
+17
s
PID control work area
to
(reserved by the system)
+32
s
I/O data area for No. 2 loop (device:
Set value
+33
s
Process
+34
s
value
Automatic
manipulated
+35
s
value
Process
value after
+36
s
filtering
Manual
manipulated MV
+37
s
value
Manual/
MAN/
automatic
+38
s
AUTO
selection
Alarm ALARM
+39
s
+40
s
PID control work area
to
(reserved by the system)
+55
s
Description
• 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.
• 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'.
+28 to +45)
s s
SV
PV
MV
PVf
The same as I/O data area for No. 1 loop
MAN
Setting range
With PID Without PID
limits limits
0: Automatic manipulated
value
1: Manual manipulated
value
If PV variation
is outside the
limit range,
'1' is set.
If MV variation
is outside the
limit range,
'1' is set.
–
–
6.1 PID Control Instruction (Inexact Differential)
6.1.2 PIDCONT instruction
S_PIDCONT
Processing when the
Setting
setting data are outside the
side
setting range
When other than 0 or 1 is
selected, an error occurs and
User the operation for the
corresponding loop is not
performed.
User
–
System
– –
– –
6
6-9