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9 CONTROL OPERATION INSTRUCTIONS
Specified position
Symbol
+60
D2
GG
+61
Loop tag
*2
memory
+62
MVP
+63
+96
Loop tag
D2
past value
*2 *3
memory
+116
+0
S3
*4
Set value
E2
+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 Section 3.3.1 for details.)
*3: The applications of the loop tag past value memory are indicated below.
Specified position
+96
D2
+97
+102
+103
+104
+105
+106
+107
+108
+109
+116
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.
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Name
Gap gain
0 to 999999
MV inside
(-999999 to 999999)
operation value
Used by the system as a work area.
Set value
-10 to 110
Description
Control cycle counter initial preset flag
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
Alarm detection 2 (ALM2)
b15
b12
b8
*1
Recommended range
b4
b0
M
M
L
H
A
A
2
2
MHA2,MLA2
(0: Without alarm)
(1: With alarm)
MELSEC-Q
Standard
Unit
Data format
value
Real
1.0
number
Real
%
0.0
number
Real
%
0.0
number
9 - 37
Store
U
S
S
U
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