Mitsubishi Q Mode, Руководство по программированию

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MELSEC-Q/QnA
4. FUNCTIONS OF PID CONTROL
4.3.3 Monitoring PID control with the AD57(S1) (QnACPU only)
The PID control operation results can be monitored in a bar graph with an AD57(S1)
CRT controller unit.
(1) The monitor screen displays the monitored information of eight loops beginning
with the designated loop number.
0
20
40
60
80
100
0
20
40
60
80
100
0
20
40
60
80
100
0
20
40
60
80
100
0
20
40
60
80
100
0
20
40
60
80
100
0
20
40
60
80
100
S P M
SV 50 %
PV 40 %
MV 73 %
PV MV
0
20
40
60
80
100
S P M
SV 91 %
PV 95 %
MV 21 %
PV MV
S P M
SV 30 %
PV 60 %
MV 50 %
PV MV
S P M
SV 40 %
PV 15 %
MV 83 %
PV MV
S P M
SV 5 %
PV 1 %
MV 25 %
PV MV
LOOP 1 LOOP 2 LOOP 3 LOOP 4 LOOP 5 LOOP 6 LOOP 7 LOOP 8
DEVICE R NO. 80
S M
SV 88 %
PV 10 %
MV 100 %
PV MV
P
SV 100 %
PV 45 %
MV 100 %
PV MV
S P M
SV 61 %
PV 0 %
MV 92 %
PV MV
S P M
Loop number display
Display the loop number (1 to 32).
Device display
Display the device in which the
PID data (SV and PV) are stored.
Device number display
Display the first device number
of the devices in which the PID
value (SV and PV) are stored.
Present value display
The SV, PV, and MV present values
for each loop are displayed as
percentages.
Limit operation status display
If an SV, PV, and/or MV limiter is
activated, the corresponding
character is highligted.
Bar graph display
The SV, PV, and MV of each loop
are displayed as percentages in a
bar graph.
If the MV percentage is in the
range of -2.5% MV 0%, a " "
will bedisplayed at the 0% position.
If the MV percentage is between
100% and 102.5%, a " " will be
displayed above the bar graph.
Alarm status display
and/or the MV exceeds the preset
is highlighted.
If the PV exceeds the preset PVL
MVL, the corresponding character
POINT
The SV, PV, and MV present value are displayed as percentages of 2000.
1) SV percentage display ...............
SV
2000
100 (%)
2) PV percentage display ...............
PV
2000
100 (%)
3) MV percentage display...............
MV
2000
100 (%)
(2) Use the PID57 instruction to execute monitoring with an AD57(S1).
See Section 9.1.3 for details on the PID57 instruction.