Never turn ON the PIDC terminal during the PID operation as overcurrent tripping may occur. Be sure
to deactivate the PID operation before turning ON the PIDC terminal.
PID Sleep Function
In parameters J15 to J17, J23, J24, a sleep function for stopping the inverter when the discharge pres-
sure rises and the discharge volume reduces during pump control is set. When the discharge pressure
rises, the frequency set value of the output of PID controller drops, and the PID Control Sleep Timer
for Process Control (J16) elapses at the PID Control Sleep Frequency for Process Control (J15) or be-
low, the inverter decelerates and stops. However
, PID control itself continues. When the discharge
pressure falls, the frequency set value of the output of PID controller rises, and the PID Control Re-
start Frequency after Stopping for Process Control (J17) is exceeded, the inverter resumes operation.
The restart conditions can be adjusted by PID Control Restart Feedback Deviation after Stopping for
Process Control (J23) and PID Control Restart Delay Time after Stopping for Process Control (J24)
based on the time and pressure variation.
• PID Control Sleep Frequency for Process Control (J15)
The sleep frequency is set.
• PID Control Sleep Timer for Process Control (J16)
The time from when the PID output falls below the value set in J15 until the inverter starts decelera-
tion stop is set.
• PID Control Restart Frequency after Stopping for Process Control (J17)
The wakeup frequency is set. Set the wakeup frequency larger than the sleep frequency (J15). If the
wakeup frequency is set smaller than the sleep frequency, the sleep frequency is ignored, and the
sleep function operates when the PID output falls below the wakeup frequency set value.
• Under sleep mode of PID control “PID-STP" (Parameter E20 to E21, E27 data = 44)
Under sleep mode of PID control “PID-STP" outputs an ON signal when the inverter stops by the
sleep function during PID control. If a signal output indicating that the inverter is in a stopped state is
required, it is necessary to allocate “PID-STP.”
7 Other Functions
7-135
M1 Series Standard Type User's Manual (I669)
7-9 Other Operation Functions
7
7-9-13 PID Function
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