Pid Pre-Charge Function Info; Operation Selection For The Pre-Charge Function - Mitsubishi Electric FR-F800 Instruction Manual

(A) Application parameters
5.11.8
PID pre-charge function
This function drives the motor at a certain speed before starting PID control. This function is useful for a pump with a
long hose. Without this function, PID control would start before the pump is filled with water, and proper control would
not be performed.
Pr. Name
760 Pre-charge fault
A616 selection
761
Pre-charge ending level
A617
762
Pre-charge ending time
A618
763 Pre-charge upper
A619 detection level
764
Pre-charge time limit
A620
1132 Pre-charge change
A626 increment amount
765 Second pre-charge fault
A656 selection
766 Second pre-charge
A657 ending level
767 Second pre-charge
A658 ending time
768 Second pre-charge
A659 upper detection level
769 Second pre-charge time
A660 limit
Second pre-charge
1133
change increment
A666
amount
Operation selection for the pre-charge function
• To enable the pre-charge function when PID control is enabled, set the pre-charge end conditions at Pr.761 Pre-charge
ending level and at Pr.762 Pre-charge ending time, or set "77" to Pr.178 to Pr.189 (input terminal function selection).
When operation is started, the inverter runs at the frequency set to Pr.127 PID control automatic switchover frequency
to enter the pre-charge state.
• Pre-charge ends and PID control starts after a pre-charge ending condition is satisfied.
• The pre-charge function is also activated at a start after release of a PID output suspension (SLEEP) state or MRS (output
shutoff). The PID output suspension (SLEEP) function is not activated until the started pre-charge operation ends.
• During pre-charge operation, the During pre-charge operation (Y49) signal is output. For the terminal used for Y49 signal
output, set "49 (positive logic)" or "149 (negative logic)" in any of Pr.190 to Pr.196 (Output terminal function selection) to
assign the function.
• The pre-charge function valid/invalid settings and pre-charge ending conditions are as follows:
402
PARAMETERS
Initial Setting
value range
0
0
1
0 to 100%
9999
9999
0 to 3600 s
9999
9999
0 to 100%
9999
9999
0 to 3600 s
9999
9999
0 to 100%
9999
9999
0 0, 1
0 to 100%,
9999
9999
0 to 3600 s,
9999
9999
0 to 100%,
9999
9999
0 to 3600 s,
9999
9999
0 to 100%,
9999
9999
Description
Fault indication with output shutoff immediately after pre-
charge fault occurs.
Fault indication with deceleration stop after pre-charge fault
occurs.
Set the measured amount to end the pre-charge operation.
Without pre-charge ending level
Set the time to end the pre-charge operation.
Without pre-charge ending time
Set the upper limit for the pre-charged amount. A pre-charge
fault occurs when the measured value exceeds the setting
during pre-charging.
Without pre-charge upper limit level
Set the time limit for the pre-charged amount. A pre-charge
fault occurs when the pre-charge time exceeds the setting.
Without pre-charge time limit
Set the change increment amount per second after the
automatic switchover frequency is reached. (for vertical
pumps).
Constant-speed operation after the automatic switchover
frequency is reached (for horizontal pumps).
Refer to Pr.760.
Refer to Pr.761.
Refer to Pr.762.
Set the second pre-charge function.
The second pre-charge function is
Refer to Pr.763.
valid when the RT signal is ON.
Refer to Pr.764.
Refer to Pr.1132.