Mitsubishi Electronics FR-F700 instruction manual Jog operation, Starting frequency

Pr. 9 Pr.	Motor protection from overheat
	51 (electronic thermal relay function)

Pr.9 Electronic thermal O/L relay Pr.51 Second electronic thermal O/L relay

Set the current of the electronic overcurrent protection to protect the motor from overheat.This feature provides the optimum protective characteristics, including reduced motor cooling capability, at low speed.

￿This function detects the overload (overheat) of the motor, stops the operation of the inverter's output transistor, and stops the output.

￿Set the rated current [A] of the motor in Pr.9.

￿When using a motor with an external thermal relay, etc., set “0” in Pr. 9 to make the electronic thermal relay function invalid. (Note that the output transistor protection of the inverter (E.THT) functions.)

￿When using the Mitsubishi constant-torque motor

1)Set “1” in Pr.71 .

(This provides a 100% continuous torque characteristic in the low-speed range.)

2)Set the rated motor current in Pr. 9.

￿When the RT signal is on, thermal protection is provided based on the Pr. 51 setting.

Use this function when rotating two motors of different rated currents individually by a single inverter. (When rotating two motors together, use external thermal relays.)

Pr. 10 to 12 DC injection brake

Pr.10 DC injection brake operation frequency	Pr.11 DC injection brake operation time
Pr.12 DC injection brake operation voltage

The DC injection brake can be operated at a motor stop to adjust the stop timing and braking torque.

Pr. 14 V/F pattern matching applications

Pr. 14 Load pattern selection

You can select the optimum output characteristic (V/F characteristic) for the application and load characteristics.

Setting “0”	Setting “1” (initial value)
For constant-torque load	For variable-torque load

100%	100%
Output voltage	Output voltage

Pr.3 Base frequency	Pr.3 Base frequency
Output frequency (Hz)	Output frequency (Hz)

Pr. 15, 16	Jog operation
Pr.15 Jog frequency	Pr.16 Jog acceleration/deceleration time

You can set the frequency and acceleration/decelertion time for jog operation. Jog operation can be performed from either the outside or PU.

Can be used for conveyor positioning, test operation, etc.

Output frequency (Hz) Pr.20

Pr.15	Forward
Jog frequency	rotation	Time
setting range
		Reverse
		rotation

Pr.16

JOG signal ON

Forward

rotation STF

ON

(Hz)	Operation
Outputfrequency	Pr.10
	Timefrequency
DC injection	Pr.12

brake	Operation
voltage	voltage
	Time
	Pr.11 Operation time

		When	When
Pr.12 Initial		Using the	Using
		Mitsubish	the
Value		Constant	Energy
		Torque	Saving
		Motor	Motor
3.7K or less	4%	←	←
5.5K to 7.5K	4%	2% *	3%
11K or more	2%	←	←
75K or more	1%	←	←

Reverse
rotation STR	ON
Logic selection of output stop
Pr. 17 signal (MRS)

Pr.17 MRS input selection

The inverter output can be shut off by the MRS signal. The logic of the MRS signal can also be selected.

Motor coasts Setting value "0" (Initial Setting value "2"

*If the Pr. 71 initial value is changed to the setting for use with a constant-torque motor, the Pr. 12

setting changes to the corresponding value in the above table.

Pr. 13, 571	Starting frequency
Pr.13 Starting frequency	Pr.571 Holding time at a start

MRS signal

STF (STR) signal

to stop		value)
	Output	Inverter	Output	Inverter
	stop		stop
		MRS		MRS
		SD (PC)		SD (PC)

Time

ON

ON

You can set the starting frequency and hold the set starting frequency for a certain period of time.

Set these functions when you need the starting torque or want smooth motor drive at a start.

Output
frequency
(Hz)
range	60
Setting	Pr.13
	0

		Time
Forward	Pr.571 setting time

rotation ON

Pr. 18 Refer to the section about Pr.1, Pr.2

Pr. 19 Refer to the section about Pr. 3.

Pr. 20, 21 Refer to the section about Pr.7, Pr.8

29 Pr. indicates simple mode parameters and Pr. indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.