11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
1257
11
■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.
■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).
■Execution cycle (T)
Set the execution cycle (T) in SD816 and SD817 in single-precision real number.
Operand: (d2)
Position Symbol Name Recommended range Data type Standard
value
Set by
+96 Control cycle
counter
initialization
completion flag
System
+97 Sample counter
(The value is
rounded off to
the nearest
whole number.)
+98 Operating
counter (The
value is rounded
off to the nearest
whole number.)
+99 Hold counter
+100
+101
DV
n-1
Last deviation
value
+116 ALM2 Alarm detection
2
MHA2, MLA2
0: No alarm
1: Alarm
Operand: (s3)
Position Symbol Name Recommended range Data type Standard
value
Set by
+0
+1
E2 Set value -10 to 110 [%] Single-precision
real number
0.0 User
To Next Page
Loading...
