Mitsubishi Electric FR-F820-04750 Instruction Manual page 570

(A) Application parameters
For reverse action
Input pressure
Input pressure
warning level
Input pressure fault
level (Pr. 1379
Output frequency
Fig. 5-203:
NOTES When the control switches between the first PID control and second PID control while the set
point is changed by the Pr. 1380 setting value or while the Y229/Y230 signal is output, the set
point returns to its original value or the signal turns OFF, and the detection restarts.
When the PID input pressure control function and the PID upper/lower limit pre-warning function
are used simultaneously, each function may change the set point. When the set point change is
attempted by both functions, the change by the PID input pressure control function has priority.
When the PID input pressure control function and the PID sleep boost function are used simulta-
neously, each function may change the set point. When the set point change is attempted by both
functions, the change by the PID input pressure control function has priority. (The sleep state is
established without applying the set point change by the PID sleep boost function.)
5 - 408
Input pressure
(Pr. 1378)
Pr.1370 Pr.1370
Pr. 1370
Set point
Pr. 1380
Pr. 1373
ON
Y229
Y230
PID input pressure control
Pr.1370 Pr.1370
Pr. 1370
Pr. 1373
ON
When Pr. 1381 = "0"
When Pr. 1381 = "1"
Output shutoff
(Pr. 1381 = "0")
Parameters
Time
Pr.1370 Pr.1370
Pr. 1370
Time
ON
Deceleration stop Deceleration stop
Deceleration stop
(Pr.1381 = "1") (Pr.1381 = "1")
(Pr. 1381 = "1")
Time
When Pr.1381= "1", operation can
be restarted after the input
pressure reaches or exceeds the
Pr. 1378 setting.
I003069E