Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 337

■Public variable (operation constant)
Variable Description
name
NMAX Output Conversion High Limit
NMIN Output Conversion Low Limit
*1
TRK Tracking Flag
SVPTN_B1 CASIN_T1 Used
SVPTN_B2 CASIN_T2 Used
SVPTN_B3 CASIN_T1 Pattern
SVPTN_B4 CASIN_T2 Pattern
SVPTN_B5 Tracking to Non-selected loop
*1 When 1 (tracking is executed) is set to the tracking flag, connect CASOUT_T of the primary loop with the input variable CASIN_T1 and
CASIN_T2.
■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
Recommended
range
-999999 to 999999
-999999 to 999999
0: Not executed
1: Executed
TRUE: Not used
FALSE: Used
TRUE: Not used
FALSE: Used
TRUE: Not primary MV
FALSE: Primary MV
TRUE: Not primary MV
FALSE: Primary MV
TRUE: Executed
FALSE: Not executed
Result
The input CASIN_T1 (%) is selected.
The input CASIN_T2 (%) is selected.
Tentative MV value (T)
DML
DML
Variation rate limiter processing result
T
MV + DML
MV - DML
10.29 Loop Selector (Enable Tracking from secondary loop to primary loop) (M+P_SEL_T3_)
Initial value
100.0
0.0
0
TRUE
TRUE
TRUE
TRUE
FALSE
Variation rate limiter
processing value
DML
DML
DML
t
Alarm (ALM)
Output variation rate limit (DMLA)
FALSE (Reset)
TRUE (Detected)
TRUE (Detected)
10 LOOP CONTROL OPERATION
Set by Data type
User REAL
User REAL
User INT
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
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