PA7300 Instruction Manual - TECO-Westinghouse Motor Company

(19) PID Sleep/Wake-up Delay Time (Bn-19)This parameter enables the inverter to stop and start running the motor if the load onthe motor is minimal.The time in Bn-19 starts when the output frequency (fout) drops below the frequencyset in Bn-18 or when the frequency command (f CMD ) exceeds the wake up frequency(Bn-20).At the sleep mode (i.e. when the output frequency Bn-18), when the time set inthe timer has expired, the inverter will ramp down the motor to stop. At the wake-upmode (i.e. when the frequency command Bn-20), when the time set in the timerhas expired, the inverter will accelerate to frequency command. If the outputfrequency rises above the frequency set in Bn-18, or the frequency command dropsbelow the set value in Bn-20, the timer is reset.(20) PID Wake Up Frequency (Bn-20)Frequency level for deactivation of sleep function. When the frequency command(f CMD ) exceeds the wake up frequency and after the time delay (set in Bn-19), theinverter restarts the motor.While the inverter has stopped the motor in sleep mode, the PID control function isstill working. When the frequency command rises above the wake up frequency inBn-20 and after the time delay (set in Bn-19), the inverter will restart the motor andthe output frequency will ramp up to the frequency command.PID Aimed ValuePID Detected ValuePID ControlFrequencyCommandf CMD fSoft StarttOutputFrequencyf out FrequencyHzFrequency Commandf CMD Wake-up FrequencyBn-20Sleep FrequencyBn-18Min Output FrequencyCn-07Output Frequencyf out Sleepdelay time(Bn-19)SleepWake-updelay time(Bn-19)Wake-up46