Mitsubishi MELSEC-Q series Programming Manual page 104

S.2PID
Specified position Symbol
+60
D2
GG
+61
+62
MVP
+63
Loop tag
+64
*2
memory
+65
+66
+67
Loop tag +96
past value
––
*2
memory
+116
*3
+0
S3
*4
E2
Set value
+1
*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 Page 27, Section 3.3.1 for
details.)
*3 The applications of the loop tag past value memory are indicated below.
Specified position
D2
+102
+103
+104
+105
+106
+107
+108
+109
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.)
*5 Increasing decreases the manipulated value variation relative to the set value change.
(It will take time to stabilize.)
Decreasing increases the manipulated value variation relative to the set value change.
However, since a compensation operation will be stronger, hunting may become greater.
*6 Increasing decreases the effect of derivative on the set value change.
Decreasing increases the effect of derivative on the set value change.
102
Name
Recommended range
Gap gain 0 to 999999
MV inside
(-999999 to 999999)
operation value
2 degree-of-
freedom
0 to 1
*5
parameter
2 degree-of-
freedom
0 to 1
*6
parameter
–– Used by the system as a work area.
Set value -10 to 110
+96 Control cycle counter initial preset flag
*7
+97 Control cycle counter
B (Last value)
n-1
PV (Process value)
n
PV (Last process value)
n-1
PV (Process value before last)
n-2
+110
DV (Last deviation value)
n-1
+111
+112
DV (Deviation value before last)
n-2
+113
+114
D (Last value)
n-1
+115
Alarm detection 2 (ALM2)
b15 b12 b8
+116
*1
Unit Data format
––
%
––
––
––
%
Description
b4 b0
M M
L H
A A
2 2
MHA2,MLA2
(0: Without alarm)
(1: With alarm)
Standard Set
value by
Real
1.0 U
number
Real
0.0 S
number
Real
0.0 U
number
Real
1.0 U
number
–– –– S
Real
0.0 U
number