YASKAWA F7 Programming Manual page 89

The following table shows the programming choices.
Input Contact Type
Set
N.O.
Value
contact
20 X
21
22
X
23
24
X
25
26
X
27
28
X
29
2A
X
2B
2C
X
2D
2E
X
2F
Function: PID Integral Reset
Setting: 30
By configuring one of the digital inputs as an Integral Reset Input, (H1-0x= 30), the value of the integral component of PID
control can be reset to zero whenever the configured input is CLOSED. The integral component of PID control will be held at
zero as long as the configured digital input is held CLOSED.
Resetting the Integral component of PID control can be useful in cases where an excessively large Integral value prevents the PID
control from responding quickly to changes in the system being regulated by the Drive (e.g. duct pressure, water temperature).
Function: PID Integral Hold
Setting: 31
By configuring a digital input as an Integral Hold input (H1-0X= 31), the value of the Integral component of the PID control
can be forced to clamp at the value it was at when the input is CLOSED. The Integral component of the PID control returns to
accumulating the error when the digital input is OPEN again.
Holding the Integral Value can be useful during periods when the error can build up naturally, such as during long
accelerations. Not allowing Integral wind-up produces a more stable PID control.
Function: Multi-step Reference 4
Setting: 32
See setting 3, 4, and 5 for description.
Table 16 Programming Choices
Detection Mode
Detected
N.C. Always
contact Detected
Running
X
X X
X
X
X X
X
X
X X
X
X
X X
X
Decel to stop
while
(major fault)
X
X
X X
X X
X
X
X
X
X
X
Programming 81
stopping Method
Coast to stop Fast stop
(major fault) (major fault)
X
X
X
X
X
X
X
X
Continue
operation
(minor fault)
X
X
X
X