BENSHAW Rsi S Series, Инструкция по эксплуатации

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Learning Advanced Features
141
Pre-PID Operation
Pre-PID allows the system to accelerate and run at a preset frequency (AP.34, Pre PID Freq) before
PID operation begins. When a run command is applied, acceleration occurs up to the preset
frequency. When the controlled variable (feedback) increases beyond the Pre-PID Exit setting
(AP.35, Pre-PID Exit), PID operation begins. If the monitored variable (feedback) does not increase
to the reference frequency (AP.19 PID Ref Set, setpoint), a fault will occur.
Pre-PID Operation Setting Details
Code Description
AP.34 Pre-PID Freq Set the operating frequency to run at during Pre PID operation. If Pre PID
Freq is set to 30Hz, the inverter continues to run at 30 Hz. until the monitored
variable (PID feedback value) exceeds the value set at AP. 35 (Pre-PID Exit),
then PID operation begins.
AP.35 Pre-PID Exit,
AP.36 Pre-PID Delay When the feedback variable of the PID controller exceeds the value set at AP.
35, PID operation begins. However, if the delay time (AP.36, Pre-PID Delay)
expires before the feedback variable reaches the exit value set at AP.35, a
“pre-PID Fail” fault will occur and the operation will stop.
PID Operation Sleep Mode
The inverter will go into sleep mode if the operation has been running below the sleep frequency
(PID Sleep Freq, AP.38) for the time period set in the sleep delay time (PID Sleep DT, AP.37). While in
sleep mode, the inverter continuously monitors the feedback value. When the feedback value
meets the conditions set in PID WakeUp Lev, AP.39 and PID WakeUp Mod, AP.40, PID operation will
resume.
PID
PID
PID Reference
AP.35 Pre-PID Exit
Feedback
AP.34 Pre-PID freq
Area 1
PID Reference
Output
Frequency
FX
Area 2
control ON
Normal operation operation