Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1267

■Loop tag past value 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.
The loop tag past value memory occupies 32 words after the loop tag memory.
Operand: (d2)
Position Symbol Name
+96  Control cycle
counter
initialization
completion flag
+97 Control cycle
counter (The
value is rounded
off to the nearest
whole number.)
+102 B Last value
n-1
+103
+104 PV Process value
n
+105
+106 PV Last process
n-1
+107 value
+108 PV Last-but-one
n-2
+109 process value
+116 ALM2 Alarm detection
2
■Set value
The set value (E2) is valid only when b0 of the set value pattern (SVPTN) is set to 0 (Used). To use the upper loop MV as the
set value (E2), specify the device (offset +12) where the manipulated value (MV) of the upper loop is set.
If E2 is not used, specify a dummy device (SD820).
Operand: (s3)
Position Symbol Name
+0 E2 Set value
+1
■Execution cycle (T)
Set the execution cycle (T) in SD816 and SD817 in single-precision real number.
Recommended range

...
b15
MHA2, MLA2
0: No alarm
1: Alarm
Recommended range
-10 to 110 [%]
Data type

b2 b1 b0
Data type
Single-precision
real number
11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
Standard Set by
value
 System
11
Standard Set by
value
0.0 User
1265