SV-iS7 User Manual - Inverter Drive Supermarket

2) PID Control Block Diagram
Notice
Chapter 8 Applied Functions
- If PID change operation (changes from PID operation to normal operation) comes into multi-function inputs
(P1~P11), the value of [%] is converted to the one of [Hz] and is output.
- Polarity of normal PID output PID OUT is unipolar and is limited by APP-29 (PID Limit Hi) and APP-30 (PID
Limit Lo).
- 100.0% is the standard of DRV-20 (maxFreq).
3) Pre-PID Operation
This is the function of normal acceleration to the set frequency without PID motion if an operating command is input and
starting PID operation when the control amount increases to a certain degree.
APP-34 Pre-PID Freq : The frequency to normal acceleration is input if normal acceleration is necessary without PID
control motion. For example, if Pre-PID Freq is set at 30Hz, normal operation continues at 30Hz until the control
amount(PID feedback amount) goes up above what is set in APP-35.
APP-35 Pre-PID Exit, APP-36 Pre-PID Delay : PID control operation starts if the input feedback amount(control amount)
of the PID controller is larger than the value set in APP-35. However, if an amount smaller than the value set in APP-35
continues for the period of time set in APP-36, the output is discontinued with a “Pre-PID Fail” trip.
8-15