■Public variable (operation constant)
Variable
Description
name
MTD
Derivative Gain
DVLS
Large Deviation Alarm Hysteresis
PN
Reverse Action/Direct Action
TRK
Tracking Flag
SVPTN_B0
Setting Value (SV) Used
SVPTN_B1
Setting Value (SV) Pattern
NMAX
Output Conversion High Limit
NMIN
Output Conversion Low Limit
*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.
■Public variable (others)
• Simulation processing
Variable
Description
name
SIMOUT
Simulation Output
*1 Read or write the variables using a program. They are not displayed in "FB Property" of the engineering tool.
■Tag data
For details on tag data that is read or written with this tag access FB, refer to the following.
Page 507 PIDP
Processing details
■Deviation check
This function block performs deviation check processing.
DVL
0
-DVL
Condition
DVL < |DV|
|DV| (DVL - DVLS)
DV: Deviation (%), DVLS: Large deviation alarm hysteresis (%), DVL: Deviation limit value (%)
10 LOOP CONTROL OPERATION
230
10.9 Position Type PID Control (Enable Tracking for primary loop/Disable Tracking from secondary loop) (M+P_PIDP_T)
*1
*1
DVLA
DVLA
DVLA
occur
reset
occur
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
-999999 to 999999
-999999 to 999999
Recommended
range
NMIN to NMAX
DVLS
t
DVLS
DVLA
reset
Alarm (ALM)
Large deviation (DVLA)
TRUE (Detected)
FALSE (Reset)
Initial value
Set by
8.0
User
2.0
User
0
User
0
User
TRUE
User
TRUE
User
100.0
User
0.0
User
Initial value
Set by
0.0
System
Data type
REAL
REAL
INT
INT
BOOL
BOOL
REAL
REAL
Data type
REAL