User`s manual

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MELSEC-Q
9 CONTROL OPERATION INSTRUCTIONS
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 U
+54
+55
I
Integral
constant
0 to 999999 s
Real
number
10.0 U
+56
+57
D
Derivative
constant
0 to 999999 s
Real
number
0.0 U
+58
+59
GW Gap width 0 to 100 %
Real
number
0.0 U
Loop tag
memory
*2
+60
+61
GG Gap gain 0 to 999999
Real
number
1.0 U
D2
+96Loop tag
past value
memory
*2
*3
+107
Used by the system as a work area. S
Set value
*4
S3
+0
+1
E2 Set value -10 to 110 %
Real
number
0.0 U
*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 Description
D2
+96 Control cycle counter initial preset flag
+97 Control cycle counter
+100
+101
I
n-1
(Last value)
+102
+103
B
n-1
(Last value)
+104
+105
PV
n
(Process value)
+106
+107
PV
n-1
(Last process value)
When control is to be started from the initial status, the data must be cleared with the sequence program.
*4: The set value (E2) becomes valid when the set value pattern (SVPTN) is set to "E2 is used".
When using the MV of the upper loop as the set value (E2), specify the device where the manipulated value (MV) of the upper loop is set
(offset + 12: MV).
When not using E2 as the set value, make sure to specify a dummy device.
(Special register SD1506 can be specified as a dummy device.)
(2) Execution cycle ( T)
Set the execution cycle in SD1500 and SD1501 as real numbers.