Mitsubishi Electric FR-F800, Инструкция по эксплуатации

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(A) Application parameters Parameters
5 - 402
PID auxiliary pressure pump function (Pr. 1374 and Pr. 1375)
●
This function enables signal output to activate an auxiliary pressure pump when the pump flow
rate is low in the system which constantly requires a high pressure.
●
When the deviation exceeds the auxiliary pressure pump operation starting level (Pr. 1374
"Auxiliary pressure pump operation starting level" – 1000%) after the PID output suspension
function (sleep function) is activated, the auxiliary pressure pump starts and the auxiliary pressure
pump operation signal (Y226) turns ON.
●
When the deviation falls below the auxiliary pressure pump operation stopping level (Pr. 1375
"Auxiliary pressure pump operation stopping level" – 1000%) during the auxiliary pressure pump
operation, the auxiliary pressure pump stops.
●
For the Y226 signal, set "226 (positive logic)" or "326 (negative logic)" in any of Pr. 190 to Pr. 196
(output terminal function selection) to assign the function.
I003064E
Fig. 5-198: PID auxiliary pressure pump function
NOTES The recommended settings of Pr. 577 (Pr. 1149), Pr. 1374, and Pr. 1375 are as follows:
Pr. 577 (Pr. 1149) > Pr. 1374 > Pr. 1375
Even when the inverter emergency stop operation (output shutoff by the MRS signal, etc.) is per-
formed, the PID auxiliary pressure pump function operation continues while the power is supplied
to the control circuit. For the emergency stop operation, configure another circuit to stop the aux-
iliary pressure 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.
0
SLEEP (SLEEP2)
Y226
Pr.575
(Pr.1147)
Pr.575
(Pr.1147)
For reverse action
Time
ON
ON ON
Set point
Measured value
Deviation value
Pr. 577 (Pr. 1149) –1000
Pr. 1374 – 1000
Pr. 1375 –1000
Output frequency
Pr. 576
(Pr. 1148)
Pr. 575
(Pr. 1147)