Setting 0: Triggered when a Run Command Is Issued (Normal)Setting 1: Triggered when an External Baseblock Is Releasedu b4: Timer FunctionThe timer function is independent of drive operation and can delay the switching of a digital output triggered by a digital inputsignal 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-functionoutput to “Timer output” (H2-oo = 12). Only one timer can be used.n b4-01, b4-02: Timer Function On-Delay, Off-Delay Timeb4-01 sets the on-delay time for switching the timer output. b4-02 sets the off-delay time for switching the timer output.No. Name Setting Range Defaultb4-01 Timer Function On-Delay Time 0.0 to 3000.0 s 0.0 sb4-02 Timer Function Off-Delay Time 0.0 to 3000.0 s 0.0 sn Timer Function OperationThe timer function switches on when the timer function input closes for longer than the value set to b4-01. The timer functionswitches off when the timer function input is open for longer than the value set to b4-02. Figure 5.13 illustrates the timerfunction operation:b4-01 b4-02 b4-01 b4-02Multi-function Contact On (Closed)Off (Open)On (Closed)Off (Open)Multi-function ContactOutput: Timer FunctionInput: Timer Function ON ONON ON（H1-□□=18)（H2-□□=12)Figure 5.13 Timer Operationu b5: PID ControlThe drive has a built-in Proportional + Integral + Derivative (PID) controller that uses the difference between the target valueand the feedback value to adjust the drive output frequency to minimize deviation and provide accurate closed loop controlof system variables such as pressure or temperature.n P ControlThe output of P control is the product of the deviation and the P gain so that it follows the deviation directly and linearly. WithP control, only an offset between the target and feedback remains.n I ControlThe output of I control is the integral of the deviation. It minimizes the offset between target and feedback value that typicallyremains when pure P control is used. The integral time (I time) constant determines how fast the offset is eliminated.n D ControlD control predicts the deviation signal by multiplying its derivative (slope of the deviation) with a time constant, then addsthis value to the PID input. This way the D portion of a PID controller provides a braking action to the controller response andcan 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 whenabsolutely necessary.n PID OperationTo better demonstrate PID functionality, Figure 5.14 illustrates the PID output when the PID input (deviation) is at a constantlevel.5.2 b: Application160 YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
