Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 225

Setting data
■Input/output variable
Variable name Description
PVP PV input (unit: %)
CASIN Cascade SV input (unit: %)
MV output (unit: %)
MVD
CASDR_MVOUT MV output for cascade direct (Unit: %)
■Public variable (operation constant)
Variable Description
name
MTD Derivative Gain
DVLS Large Deviation Alarm Hysteresis
PN Reverse Action/Direct Action
SVPTN_B0 Setting Value (SV) Used
PVTRK_EN PV Tracking Execution condition
ISTP Integration Stop Signal
DSTP Derivation Stop Signal
LMT_ISTP Stop Integration, when MV variation rate limiter alarm
occurred
SVLMT_EN SV High/Low Limiter
■Tag data
For details on tag data that is read or written with this tag access FB, refer to the following.
Page 501 2PIDH
Processing details
■Deviation check
This function block performs deviation check processing.
DVL
0
-DVL
DVLA
occur
Condition
DVL < |DV|
|DV|  (DVL - DVLS)
DV: Deviation (%), DVLS: Large deviation alarm hysteresis (%), DVL: Deviation limit value (%)
DVLA DVLA
reset occur
10.8 2-degree-of-freedom Advanced PID Control (Disable Tracking for primary loop) (M+P_2PIDH_)
Recommended Type
range
0 to 100[%] Input variable
0 to 100[%] Input variable
-999999 to 999999[%] Output variable
0 to 100[%] Output variable
Recommended Initial value
range
0 to 9999 8.0
0 to 100 2.0
0: Reverse action 0
1: Direct action
TRUE: Not used TRUE
FALSE: Used
TRUE: Execute FALSE
FALSE: Stop
TRUE: Execute FALSE
FALSE: Stop
TRUE: Execute FALSE
FALSE: Stop
TRUE: Stop FALSE
FALSE: Not stop
TRUE: Executed FALSE
FALSE: Not executed
DVLS
t
DVLS
DVLA
reset
Alarm (ALM)
Large deviation (DVLA)
TRUE (Detected)
FALSE (Reset)
Data type
REAL
REAL
REAL
REAL
Set by Data type
User REAL
User REAL
User INT
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
10 LOOP CONTROL OPERATION
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