Mitsubishi Electric FR-F820-00046 Instruction Manual page 40

PID priming pump function (Pr.1363)
• This function starts the priming pump first before starting the main pump so that the main pump does not intake air
at start.
• When the start command is turned ON after setting Pr.1363 PID Priming time"9999", the priming pump
operation signal (Y217) turns ON to start the priming pump. When the elapsed time exceeds the Pr.1363 setting,
the main pump starts.
• The priming pump continues operation during operation of the main pump. When the STF signal is turned OFF to
stop the main pump, the priming pump also stops.
• For the Y217 signal, set "217 (positive logic)" or "317 (negative logic)" in any of Pr.190 to Pr.196 (output terminal
function selection) to assign the function.
Output frequency
NOTE
• The priming operation is performed at every startup.
• When the operation is restarted after inverter reset by a protective function activation, the priming operation is
performed.
• When the control switches between the first PID control and second PID control during the priming time, the
priming time is carried over.
• The PID priming pump function is enabled when the PID setting is applied to the frequency.
• Even when the inverter emergency stop operation (output shutoff by the MRS signal, etc.) is performed, the PID
priming pump function operation continues while the power is supplied to the control circuit. For the emergency
stop operation, configure another circuit to stop the priming pump.
• Changing the terminal assignment using Pr.190 to Pr.196 (output terminal function selection) may affect the
other functions. Set parameters after confirming the function of each terminal.
Priming time
(Pr.1363)
STF ON
PID
ON
Y217
PID control
ON
6
Time
BCN-C22005-703