Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 217

Setting data
■Input/output variable
Variable name Description
PVP PV input (unit: %)
CASIN_T Cascade SV input (unit: %) (With tracking) (Indirect
address)
 MV output (unit: %)
MVD
CASDR_MVOUT MV output for cascade direct (Unit: %)
■Public variable (operation constant)
Variable name Description
MTD Derivative Gain
DVLS Large Deviation Alarm Hysteresis
PN Reverse Action/Direct Action
*1
TRK Tracking Flag
SVPTN_B0 Setting Value (SV) Used
SVPTN_B1 Setting Value (SV) Pattern
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
*1 When 1 (tracking is executed) is set to the tracking flag, connect CASOUT_T of the primary loop with the input variable CASIN_T.
■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 (%)
10.7 2-degree-of-freedom Advanced PID Control (Enable Tracking for primary loop) (M+P_2PIDH_T_)
*1
DVLA DVLA DVLA
reset occur reset
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
0: Not executed 0
1: Executed
TRUE: Not used TRUE
FALSE: Used
TRUE: Not primary MV TRUE
FALSE: Primary MV
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
Alarm (ALM)
Large deviation (DVLA)
TRUE (Detected)
FALSE (Reset)
10 LOOP CONTROL OPERATION
Data type
10
REAL
DWORD
REAL
REAL
Set by Data type
User REAL
User REAL
User INT
User INT
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
User BOOL
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