Mitsubishi Electric FR-F800 User Manual

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5. PARAMETERS
5.11 (A) Application parameters
5.11.9 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.
 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.
Pr. Name Initial
value
Setting range Description
760
A616
Pre-charge fault selection 0 0 Fault indication with output shutoff immediately after pre-charge
fault occurs.
1 Fault indication with deceleration stop after pre-charge fault
occurs.
761
A617
Pre-charge ending level 9999 0 to 100% Set the measured amount to end the pre-charge operation.
9999 Without pre-charge ending level
762
A618
Pre-charge ending time 9999 0 to 3600 s Set the time to end the pre-charge operation.
9999 Without pre-charge ending time
763
A619
Pre-charge upper detection
level
9999 0 to 100% Set the upper limit for the pre-charged amount. A pre-charge
fault occurs when the measured value exceeds the setting
during pre-charging.
9999 Without pre-charge upper limit level
764
A620
Pre-charge time limit 9999 0 to 3600 s Set the time limit for the pre-charged amount. A pre-charge fault
occurs when the pre-charge time exceeds the setting.
9999 Without pre-charge time limit
1132
A626
Pre-charge change
increment amount
9999 0 to 100% Set the change increment amount per second after the
automatic switchover frequency is reached (for vertical pumps).
9999 Constant-speed operation after the automatic switchover
frequency is reached (for horizontal pumps).
765
A656
Second pre-charge fault
selection
0 0, 1 Refer to Pr.760. Set the second pre-charge function.
The second pre-charge function is
valid when the RT signal is ON.
766
A657
Second pre-charge ending
level
9999 0 to 100%,
9999
Refer to Pr.761.
767
A658
Second pre-charge ending
time
9999 0 to 3600 s,
9999
Refer to Pr.762.
768
A659
Second pre-charge upper
detection level
9999 0 to 100%,
9999
Refer to Pr.763.
769
A660
Second pre-charge time limit 9999 0 to 3600 s,
9999
Refer to Pr.764.
1133
A666
Second pre-charge change
increment amount
9999 0 to 100%,
9999
Refer to Pr.1132.

Mitsubishi Electric FR-F800 Specifications

General

Brand	Mitsubishi Electric
Model	FR-F800
Category	Inverter
Language	English