Mitsubishi Electric MELSEC iQ-R Series - Page 1311

11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
1309
11
■Block memory
■Operation constant
*1 Set the upper limit (HILMT) and lower limit values (LOLMT) in such a way that HILMT equals to or exceeds LOLMT.
Processing details
This instruction applies upper and lower limiters with hysteresis to the output value.
The S.LIMT instruction performs the following operations.
Operand: (d1)
Device Symbol Name Recommended range Data type Standard
value
Set by
+0
+1
BW Output value -999999 to 999999 [%] Single-precision
real number
 System
+2 BB BB1 Upper limit
alarm
0: No alarm
1: Alarm
16-bit unsigned
binary
 System
BB2 Lower limit
alarm
Operand: (s2)
Device Symbol Name Recommended range Data type Standard
value
Set by
+0
+1
HILMT Upper limit
value
*1
-999999 to 999999 [%] Single-precision
real number
100.0 User
+2
+3
LOLMT Lower limit
value
*1
-999999 to 999999 [%] Single-precision
real number
0.0 User
+4
+5
HS1 Upper limit
hysteresis
0 to 999999 [%] Single-precision
real number
0.0 User
+6
+7
HS2 Lower limit
hysteresis
0 to 999999 [%] Single-precision
real number
0.0 User
Condition BW BB1 BB2
E1HILMT HILMT 1 0
(LOLMT+HS2)<E1<(HILMT-HS1) E1 0 0
E1LOLMT LOLMT 0 1
Other than the above (hysteresis part) E1 Last value Last value
b15 b1
b0
...
BB1 BB2
BB2
BB1
LOLMT LOLMT+HS2
LOLMT+HS2
LOLMT
HILMT-HS1 HILIMT
HILMT-HS1
HILMT
BW
X1