Mitsubishi Electric FR-F740 EC Instruction Manual page 501

Parameter
Operation selection for the pre-charge function
The pre-charge function ends when any of the following conditions is satisfied. It also ends when
the start signal turns OFF or the output is shutoff (except for the PID output suspension function
(SLEEP)).
Pre-charge ending condition
Measured amount
Time
Signal
Tab. 6-118: Pre-charge ending
Using parameters, set the pre-charge ending conditions and the pre-charge function to be valid
or invalid.
Pr. 127 PID
control auto-
matic switcho-
ver frequency
9999
≠ 9999
Tab. 6-119: Settings of the pre-charge function
When two or more conditions are satisfied, the pre-charge operation ends by the first-
satisfied condition.
● Starting the pre-charge operation
Pre-charge operation starts when a start command is given (after the PID output suspension
(SLEEP) or the MRS (output shutoff) signal cancellation) while the pre-charge operation is
set active by parameters.
● Ending the pre-charge operation
The pre-charge operation ends and PID control starts when any of the ending conditions in
the above table is satisfied.
FR-F700 EC
The measured amount reaches pre-charge ending level or
higher.
The pre-charge operation lasts pre-charge ending time or
longer.
The pre-charge end command (X77, X78) is input.
Pre-charge ending condition
Pr. 761 Pr. 762
Pre-charge Pre-charge
ending level ending time
— —
9999
9999
≠ 9999
9999
≠ 9999
≠ 9999
Pre-charge
Pre-charge
function
end com-
mand (X77)
—
Invalid
Not assigned
Assigned
Not assigned
Assigned
Not assigned
Valid
Assigned
Not assigned
Assigned
PID control
Related parameter
Pr. 761, Pr. 766
Pr. 762, Pr. 767
Pr. 178 to Pr. 189
Valid pre-charge ending condition
—
— —
— Time
— Time
Measured
—
amount
Measured
—
amount
Measured
Time
amount
Measured
Time
amount
X77
—
X77
—
X77
—
X77
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