Mitsubishi Electric FR-A700 Technical Manual page 302

[Pr. ] Name
Stall prevention level
148
at 0V input
Stall prevention level
149
at 10V input
Voltage reduction
154 selection during stall
prevention operation
Stall prevention
156
operation selection
OL signal output
157
timer
Stall prevention
277 operation current
switchover
High resolution
analog input
406
selection
Terminal 4 function
858
assignment
Terminal 1 function
868
assignment
(1) Setting of stall prevention operation level
[Pr. 22]
common
Set in [Pr. 22] the percentage of the output current to
the rated inverter current at which stall prevention
operation will be performed. Normally, set 150%
(initial value) for
A700 E700 D700
value) for .
F700
During acceleration, stall prevention operation stops
acceleration. During constant speed, it decelerates,
and during deceleration, it stops deceleration. If stall
prevention operated during deceleration to stop, the
inverter would not stop. To prevent this, stall
prevention during deceleration becomes invalid after
3s so that motor decelerates to a stop.
When stall prevention operation is performed, the OL
signal is output.
If an overload status lasts long, an inverter trip (e.g.
electronic thermal O/L relay) (E.THM)) may occur.
When [Pr. 156] has been set to activate the fast-
response current limit (initial value), the [Pr. 22]
setting should not be higher than 170%. (140% for
) If fast-response current limit activates, torque
F700
may not be generated.
[Pr. 22]
Constant
speed
OL
Stall prevention operation example
Initial Setting
Value Range
150% 0 to 220%
A700 A700
120% 0 to 150%
F700 F700
200% 0 to 220%
A700 A700
150% 0 to 150%
F700 F700
0
1
1
0 0 to 31, 100, 101
0 to 25s
0s
9999
0
0
1
9999 0, 2 to 6, 9999
0 0, 1, 4, 9999
0 0 to 6, 9999
, and set 120% (initial
Output current
Output frequency
Time
Description
Stall prevention operation level can be changed
by the analog signal input to terminal1 and 4
(For , input is to terminal 1 only).
F700
With voltage You can select whether to
use output voltage
reduction
reduction during stall
Without voltage
prevention operation or
reduction
not.
You can select whether stall prevention
operation and fast-response current limit
operation will be performed or not.
Set the output start time of the OL signal output
when stall prevention is activated.
Without the OL signal output
Output current is the limit level
Output torque (torque current) is the limit level
When the setting value is "4", stall prevention
operation level can be changed by the signal
output to terminal 6.
By setting 4, the stall prevention operation level
can be changed with a signal to terminal 4.
By setting 4, the stall prevention operation level
can be changed with a signal to terminal 1.
(2) Second, third stall prevention operation
level [Pr. 48, 49**, 114* **, 115* **]
(*Not available for
(**Not available for
In
A700 F700
current] is valid when [Pr. 49 Second stall prevention
operation frequency = 9999] and RT signal is ON. In
, [Pr. 48] is valid when RT signals is ON.
E700 D700
When [Pr. 49 (115) ≠ 0] in
prevention operation level for output frequency from
0Hz to [Pr. 49 (115)] can be set to [Pr. 48 (114)]. Note
that the operation level follows the [Pr. 22] setting
during acceleration.
This function can also be used for stop-on-contact or
similar operation by decreasing the [Pr. 48 (114)]
setting to weaken the deceleration torque (stopping
torque).
[Pr. 114 and Pr. 115] of
signal is ON. For the terminal used for X9 signal
input, set 9 in any of [Pr. 178 to Pr. 189 Input terminal
function selection] to assign the X9 signal function.
During acceleration
[Pr.48]
During deceleration/constant speed During deceleration/constant speed During deceleration/constant speed
[Pr.114]
[Pr.49] Running frequency
[Pr.115]
Operation example when frequency is set in [Pr.49
(115)] in .
A700
336
PARAMETER
Available Inverters
A700 F700
— —
—
—
—
.)
F700
.)
common
E700 D700
, [Pr. 48 Second stall prevention operation
A700 F700
are valid when the X9
A700
Output
frequency (Hz)
Set
frequency
[Pr.49
(Pr.115)]
Stall
prevention
level [Pr. 22]
used
E700 D700
— —
— —
— —
—
— —
— —
— —
, the stall
Output
frequency
Time
[Pr. 48
(Pr.114)]
used