Mitsubishi Electric MELSEC iQ-R Series, Programming Manual

Page: 1317 / 2110

11 PROCESS CONTROL INSTRUCTIONS
11.3 Control Operation Instructions
1315
11
■
Block memory
■
Operation constant
■ Execution cycle (

T)
Set the execution cycle (

T) in SD816 and SD817 in single-precision real number.
Processing details
This instruction holds the last value and outputs it when the variation rate of input (E1) exceeds the limit.
E1: Input value, BW: Output value
The S.VLMT2 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 Positive
direction limit
alarm
0: No alarm
1: Alarm
16-bit unsigned
binary  System
BB2 Negative
direction limit
alarm
Operand: (s2)
Device Symbol Name Recommended range Data type Standard
value Set by
+0
+1 V1 Positive
direction limit
value 0 to 999999 [%/s] Single-precision
real number 100.0 User
+2
+3 V2 Negative
direction limit
value 0 to 999999 [%/s] Single-precision
real number 100.0 User
+4
+5 HS1 Positive
direction
hysteresis 0 to 999999 [%] Single-precision
real number 0.0 User
+6
+7 HS2 Negative
direction
hysteresis 0 to 999999 [%] Single-precision
real number 0.0 User
Condition Input (E1-BW) BW BB1 BB2
Positive direction E1

BW (E1-BW)

(V1

T) BW=BW 1 0
(E1-BW) < (V1

T-HS1) BW=E1 0 0
Others BW=BW Last value Last value
Negative direction E1<BW (BW-E1)

(V2

T) BW=BW 0 1
(BW-E1)<(V2

T-HS2) BW=E1 0 0
Others BW=BW Last value Last value
b15 b1 b0
...
BB1 BB2
BB1
BB2
E1 (BW)
E1
BW