Mitsubishi Electric MELSEC iQ-R Series - Page 1398

1396
11 PROCESS CONTROL INSTRUCTIONS
11.7 Auto Tuning
■Local work memory
The system uses this area as a work area.
To start the control from the initial status, clear data by using a sequence program.
*1 The sampling period counter, timeout time counter, and timeout (after maximum ramp) counter are each rounded off to the nearest
whole number.
■Execution cycle (T)
Set the execution cycle (T) in SD816 and SD817 in single-precision real number.
Operand: (d3)
Device Symbol Name Recommended range Data type Standard
value
Set by
+0  Sampling period counter initialization
completion flag
System
+1 Sampling period counter
*1
+2 Timeout time counter initialization
completion flag
+3 Timeout time counter
*1
+4 Timeout time (after maximum ramp)
counter initialization completion flag
+5 Timeout time (after maximum ramp)
counter
*1
+6 Step manipulated value set completion flag
+7 Auto tuning counter
+8
+9
Auto tuning start PV0
+10
+11
PV
n-1
Last process value
+12
+13
 Maximum ramp value
+14
+15
Counter at maximum ramp
+16
+17
PV at maximum ramp
+18
+19
R Response speed
+20
+21
L Equivalent dead time