B4: Timer Function; B5: Pid Control - YASKAWA P1000 Technical Manual

5.2 b: Application
Setting 0: Triggered when a Run Command Is Issued (Normal)
Setting 1: Triggered when an External Baseblock Is Released
u

b4: Timer Function

The timer function is independent of drive operation and can delay the switching of a digital output triggered by a digital input
signal and help eliminate chattering switch noise from sensors. An on-delay and off-delay can be set separately.
To enable the timer function, set a multi-function input to "Timer Function Input" (H1-oo = 18) and set a multi-function
output to "Timer output" (H2-oo = 12). Only one timer can be used.
n b4-01, b4-02: Timer Function On-Delay, Off-Delay Time
b4-01 sets the on-delay time for switching the timer output. b4-02 sets the off-delay time for switching the timer output.
No.
b4-01
b4-02
n Timer Function Operation
The timer function switches on when the timer function input closes for longer than the value set to b4-01. The timer function
switches off when the timer function input is open for longer than the value set to b4-02.
function operation:
Multi-function Contact
Input: Timer Function
Multi-function Contact
Output: Timer Function
u

b5: PID Control

The drive has a built-in Proportional + Integral + Derivative (PID) controller that uses the difference between the target value
and the feedback value to adjust the drive output frequency to minimize deviation and provide accurate closed loop control
of system variables such as pressure or temperature.
n P Control
The output of P control is the product of the deviation and the P gain so that it follows the deviation directly and linearly. With
P control, only an offset between the target and feedback remains.
n I Control
The output of I control is the integral of the deviation. It minimizes the offset between target and feedback value that typically
remains when pure P control is used. The integral time (I time) constant determines how fast the offset is eliminated.
n D Control
D control predicts the deviation signal by multiplying its derivative (slope of the deviation) with a time constant, then adds
this value to the PID input. This way the D portion of a PID controller provides a braking action to the controller response and
can reduce the tendency to oscillate and overshoot.
D control tends to amplify noise on the deviation signal, which can result in control instability. Only use D control when
absolutely necessary.
n PID Operation
To better demonstrate PID functionality,
level.
160
Name
Timer Function On-Delay Time
Timer Function Off-Delay Time
□□
ON
=18)
（H1-
□□
ON
=12)
（H2-
b4-01
Figure 5.13 Timer Operation
Figure 5.14 illustrates the PID output when the PID input (deviation) is at a constant
ON
b4-02 b4-01
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Setting Range
0.0 to 3000.0 s
0.0 to 3000.0 s
Figure 5.13 illustrates the timer
On (Closed)
Off (Open)
On (Closed)
ON
Off (Open)
b4-02
Default
0.0 s
0.0 s