Mitsubishi F700 Series User Manual

270
PID control
4.20.3 Pre-charge function (Pr.760 to Pr. 769)
This function is to drive the motor at a certain speed before starting PID control. The motor is operated at Pr. 127
PID control automatic switchover frequency at start until a pre-charge ending condition is satisfied. PID control starts
after a pre-charge ending condition is satisfied. (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. )
Pre-charge function is also valid for a start after the PID output suspension (SLEEP). PID output suspension
(SLEEP) function is not performed until the pre-charge operation ends.
Parameter
Number
Name
Initial
Value
Setting
Range
Description
760
Pre-charge fault
selection
0
0
When the pre-charged amount exceeds Pr. 763 or the pre-
charged time exceeds Pr. 764, the output is immediately
shutoff, and the fault (E.PCH) is output.
1
When the pre-charged amount exceeds Pr. 763 or the pre-
charged time exceeds Pr. 764, the motor decelerates to stop,
and the fault (E.PCH) is output.
761
Pre-charge ending
level
9999
0 to 100%
*1 Set the measurement level to end the pre-charge operation.
9999 Without pre-charge ending level
762 Pre-charge ending time 9999
0.0 to 3600s Set the time to end the pre-charge operation.
9999 Without pre-charge ending time
763
Pre-charge upper
detection level
9999
0 to 100%
*1
Set the upper limit for the pre-charged amount. If the pre-
charged amount exceeds the set level, the fault (E.PCH) is
output.
9999 Without pre-charge upper detection level
764 Pre-charge time limit 9999
0.0 to 3600s
Set the time limit for the pre-charge operation. If the pre-
charged time exceeds the set level, the fault (E.PCH) is output.
9999 Without pre-charge time limit
765
Second pre-charge
fault selection
0
0
When the pre-charged amount exceeds Pr. 768 or the pre-
charged time exceeds Pr. 769 while the RT signal is ON, the
output is immediately shutoff, and the fault (E.PCH) is output.
1
When the pre-charged amount exceeds Pr. 768 or the pre-
charged time exceeds Pr. 769 while the RT signal is ON, the
motor decelerates to stop, and the fault (E.PCH) is output.
766
Second pre-charge
ending level
9999
0 to 100%
*1
Set the measurement level to end the pre-charge operation,
which is performed while the RT signal is ON.
9999 Without second pre-charge ending level
767
Second pre-charge
ending time
9999
0.0 to 3600s
Set the time to end the pre-charge operation, which is
performed while the RT signal is ON.
9999 Without second pre-charge ending time
768
Second pre-charge
upper detection level
9999
0 to 100%
*1
Set the upper limit for the pre-charged amount, which is
charged while the RT signal is ON. If the pre-charged amount
exceeds the set level, the fault (E.PCH) is output.
9999 Without second pre-charge ending level
769
Second pre-charge
time limit
9999
0.0 to 3600s
Set the time limit for the pre-charge operation, which is
performed while the RT signal is ON. If the pre-charged time
exceeds the set level, the fault (E.PCH) is output.
9999 Without second pre-charge time limit
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 185)
*1 Setting values of Pr. 761, Pr. 763, Pr. 766, Pr. 768 are without unit when "9999" is set to both of C42(Pr. 934) and C44(Pr. 935).

Mitsubishi F700 Series Specifications

General

Humidity	95% RH or less (non-condensing)
Control Method	V/F control
Protection Features	Overcurrent, overvoltage, undervoltage, overheat, short circuit
Communication Options	RS-485
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C to +65°C
Altitude	Up to 1000m above sea level
Overload Capacity	150% for 60 seconds
Cooling Method	Forced air cooling
Power Range	0.75 to 630 kW (1 to 845 hp)
Output Voltage	3-phase 200 to 240 VAC, 380 to 500 VAC (matching input voltage)