Toshiba V Series User Manual page 186

Appendix E Details of Variables
Item name
Control operation
type
Control scan
specification
Control operation
direction
MV output direction
Proportional gain
Integral time
Derivative time
Derivative gain
2-degree-of-freedom
proportional coefficient
(SV high limit value)
2-degree-of-freedom
integral coefficient
(SV low limit value)
E
2-degree-of-freedom
derivative coefficient
Deviation gap width
(bias)
164
Abbr.
CTL The instrument type can be selected from the following:
[Control operation type]
None
PID calculation
Sample PI calculation
M/A manipulator
Ratio setter
PRS Not used for LC511/LC,512. Leave the initial value (main scan) as
is.
CDR In the case of PID controller and sample PI controller, the
calculation direction of manipulated valuable MV with respect to
deviation is selected.
MV increases when deviation (SV − PV) increases or MV
decreases when deviation (SV − PV) increases.
The output direction of valve is selected. [4 − 20mA output with
MDR
0 − 100%] or [20 − 4mA output with 0 − 100%]
Note: At the time of pulse output, the direction of this output is as
follows: ∆ MV is positive and Open pulse output when
[4 − 20mA output with 0 − 100%]. ∆ MV is positive and Closed
pulse output when [20 − 4mA output with 0 − 100%].
KP Proportional gain of PID operation
• 0 or more
TI Integral time of PID operation
• 0 or more
TD Derivative time of PID operation. Real number. Unit [min]
• 0 or more
η of incomplete derivative gain (1/ η )
ETA
• 0 < ETA ≤ 1
2-degree-of-freedom proportional coefficient ( α )
ALP
• 0 ≤ ALP ≤ 1
Note: In the case of CTL = Ratio setter, this is defined as SV high
limit value.
2-degree-of-freedom integral coefficient ( β )
BET
• 1 ≤ BET < 2
Note: In the case of CTL = Ratio setter, this is defined as SV low
limit value.
2-degree-of-freedom derivative coefficient ( γ )
GAM
• 0 ≤ GAM < 2
GP At the time of PID or SPI operation, gain can be modified within
the gap near the deviation (SV − PV). Here, its gap width can be
set
• 0 ≤ GP ≤ 100
Note: In the case of CTL = Ratio setter, this is defined as BIAS.
Description
[Description]
Instrument calculation processing will
not be made.
PID controller is selected.
Sample PI controller is selected.
M/A manipulator is selected.
Ratio setter is selected.
Model 1000 Loop Controller L1 LC511,512 User's Manual
Data type
DSP
[unit]
WORD
−
BOOL
BOOL
REAL
[twice]
REAL
[min]
REAL
REAL
REAL
[twice]
([EU])
REAL
[twice]
([EU])
REAL
[twice]
REAL [%]
([EU])