User`s manual

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MELSEC-Q
13 AUTO TUNING
Specified position Symbol Name Recommended range
*1
Unit Data format
Standard
value
Store
D2
+52
+53
P Gain 0 to 999999
Real
number
1.0 S/U
+54
+55
I
Integral
constant
0 to 999999 s
Real
number
10.0 S/U
+56
+57
D
Derivative
constant
0 to 999999 s
Real
number
0.0 S/U
+70
+71
AT1
STEP
MV
Step
manipulated
value for AT1
-100 to 100 %
Real
number
0.0 U
+72
+73
AT1ST
Sampling
cycle for AT1
0 to 999999 Note that
T
AT1ST
32767
s
Real
number
1.0 U
Loop tag
memory
*2
+74
+75
AT1
TOUT1
Time-out time
for AT1
0 to 999999 Note that
T
AT1TOUT1
3276
7
s
Real
number
100.0 U
+76
+77
AT1
TOUT2
After
maximum
slope time-out
time for AT1
0 to 999999 Note that
T
AT1TOUT2
3276
7
s
Real
number
10.0 U
D3
+0
Local
work
memory
*3
+21
System area Used by the system as a work area. S
*1: The data of the item(s) where the values within the recommended range are given in the parentheses are stored by the system.
Users cannot set the data.
*2: The loop tag memory and loop tag past value memory occupy a total of 128 words. (Refer to Section 3.3.1 for details.)
*3: The applications of the loop tag past value memory are indicated below.
Specified position contents
S3
+0 Sampling cycle counter initial preset flag
+1 Sampling cycle counter
+2 Time-out time counter initial preset flag
+3 Time-out time counter
+4 After maximum slope time-out time counter initial preset flag
+5 After maximum slope time-out time counter
+6 Step manipulated value preset flag
+7 Counter from auto tuning start
+8
+9
Auto tuning start-time PV0
+10
+11
PV
n-1
(Last process value)
+12
+13
Maximum slope value
+14
+15
Maximum slope-time counter
+16
+17
Maximum slope-time PV
+18
+19
R (Response speed)
+20
+21
L (Equivalent dead time)
When control is to be started from the initial status, the data must be cleared with the sequence program.
(2) Execution cycle ( T)
Set the execution cycle in SD1500 and SD1501 as a real number.