Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 326

■Public variable (operation constant)
Variable Description
name
NMAX Output Conversion High Limit
NMIN Output Conversion Low Limit
■Tag data
For details on tag data that is read or written with this tag access FB, refer to the following.
Page 544 SEL
Processing details
■Input selection processing
Selection signal (SELECT)
FALSE
TRUE
■Variation rate & high/low limiter
This function block checks the variation rate and high/low limits of the input value.
• Variation rate limiter
DML
DML
Execution cycle(ΔT)
Condition
|T - MV|  DML
T - MV > DML
T - MV < -DML
T: Tentative manipulated value, MV: Manipulated value, DML: Output variation rate high limit value
• High/low limiter
High/low limiter processing result
Execution cycle (ΔT)
Condition
Variation rate limiter processing result
> MH
Variation rate limiter processing result
< ML
ML  Variation rate limiter processing
result  MH
MH: Output high limit value, ML: Output low limit value
10 LOOP CONTROL OPERATION
324
10.26 Loop Selector (Disable Tracking for primary loop) (M+P_SEL)
Tentative MV value (T)
DML
DML
Variation rate limiter processing result
T
MV + DML
MV - DML
Variation rate limiter processing value
High/low limiter processing
result
MH
ML
Variation rate limiter processing value
Recommended Initial value
range
-999999 to 999999 100.0
-999999 to 999999 0.0
Result
The input PVP1 (%) is selected.
The input PVP2 (%) is selected.
Variation rate limiter
processing value
DML
DML
DML
t
Alarm (ALM)
Output variation rate limit (DMLA)
FALSE (Reset)
TRUE (Detected)
TRUE (Detected)
Alarm (ALM)
Output Low Limit Alarm (MLA)
FALSE (Reset)
TRUE (Detected)
TRUE (Detected)
Set by Data type
User REAL
User REAL
High/low limiter
processing value
Output high limit
(MH)
Output low limit
(ML)
t
Output High Limit Alarm
(MHA)
TRUE (Detected)
FALSE (Reset)
FALSE (Reset)