Mitsubishi Electric FR-A700 Technical Manual page 304

(4) Analog variable stall prevention operation
level setting [Pr. 22, 148, 149, 406*, 858*,
868*] (*not available for
For , set [Pr. 868 Terminal 1 function assignment =
A700
4] to set stall prevention operation level using
terminal 1 (analog input). (Refer to page 46 for
terminal1 function assignment)
For , set [Pr. 22 Stall prevention operation level =
F700
9999] to set stall prevention operation level using
terminal 1 (analog input).
At this time, other functions of terminal 1 (auxiliary
input, override function, PID control) do not function.
Input 0 to 5V (or 0 to 10V) to the terminal 1. For
selection of 5V and 10V, use [Pr. 73 Analog input
selection]. When [Pr. 73 = 1] (initial value), 0 to ±10V is
input.
For , set [Pr. 858 Terminal 4 function assignment =
A700
4] to set stall prevention operation level using
terminal 4 (analog input). When 4 is set in both [Pr.
858] and [Pr. 868], function of terminal 1 has higher
priority and terminal 4 has no function. (Refer to page
46 for terminal 4 function assignment)
Input 0 to 20mA to terminal 4. Turning ON of AU
signal is not necessary. PID control and speed
command from terminal 4 do not function even if the
AU signal turns ON.
For , stall prevention operation level can not be
F700
set using terminal 4.
When using
A700
operation level can be also set to terminal 6 (analog
input). For this, set [Pr. 406 High resolution analog input
selection = 4]. When [Pr. 858 = 4] and [Pr. 868 = 4]
while [Pr. 406 High resolution analog input selection = 4],
terminal 6 is the stall prevention operation level, and
terminal 1 and terminal 4 does not have a function.
Set stall prevention operation level at 0V (0mA) input
voltage in [Pr. 148 Stall prevention level at 0V input] .
Set stall prevention operation level at 10V/5V(20mA)
input voltage in [Pr. 149 Stall prevention level at 10V
input].
Stall prevention
operation level (%)
150%
120%
100%
50%
0V
(-5V/10VDC)
0mA
Set the current limit level at 0V input
voltage (input current 0mA) using [Pr. 148].
)
F700
A700 F700
with FR-A7AZ, stall prevention
Set the current limit level at 10V/5V input
power (input current 20mA) using Pr. 149.
Input voltage (V)
(5V/10VDC)
Input current (mA)
(20mA)
(5) Stall prevention operation and limit of
fast-response current limit operation [Pr.
156]
common
Use [Pr. 156] to select whether stall prevention
operation or fast-response current limit operation will
be performed or not and the operation at OL signal
output.
When the load is heavy, or the acceleration/
deceleration time is short, stall prevention is activated
and acceleration/deceleration may not be made
according to the preset acceleration/deceleration
time. Set [Pr. 156] and stall prevention operation level
to the optimum values.
In vertical lift applications, make setting so that the
fast-response current limit is not activated. Torque
may not be produced, causing a drop due to gravity.
[Setting example]
Fan/Pump ................................................................ 0
Lifting device/traveling machine .............................. 9
(a stop distance at deceleration should not change)
Fast
Response
[Pr. 156]
Current
Limit
Setting
*1
: Activated
: Not activated
0
(initial value)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
338
PARAMETER
Stall Prevention
Operation
OL Signal
Selection
Output
: Activated
: Not activated
: Operation Continued
: Operation is not
Continued
A700 F700
E700 D700
*2
—
*3
—
*4