■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
■Tag data
For details on tag data that is read or written with this tag access FB, refer to the following.
Page 491 PID
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
DVLA
reset
occur
reset
10.4 Velocity Type PID Control (Disable Tracking for primary loop) (M+P_PID)
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
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
BOOL
197
10