Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 273

■Public variable (operation constant)
Variable Description
name
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
*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 515 IPD
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 (%)
Recommended range
0 to 9999
0 to 100
0: Reverse action
1: Direct action
0: Not executed
1: Executed
TRUE: Not used
FALSE: Used
TRUE: Not primary MV
FALSE: Primary MV
DVLA DVLA DVLA
reset occur reset
10.15 I-PD Control (Enable Tracking for primary loop) (M+P_IPD_T)
Initial value
8.0
2.0
0
0
TRUE
TRUE
DVLS
t
DVLS
Alarm (ALM)
Large deviation (DVLA)
TRUE (Detected)
FALSE (Reset)
10 LOOP CONTROL OPERATION
Set by Data type
User REAL
User REAL
User INT
User INT
User BOOL
User BOOL
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