Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 413

 Disabling the stall prevention operation and fast-response current limit
according to operating conditions (Pr.156)
• Referring to the following table, enable/disable the stall prevention operation and the fast-response current limit operation,
and also set the operation at OL signal output.
Pr.156
setting
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
24
25
26
27
28
29
30
31
Power driving ○
*3
100 Regenerative
driving
Power driving ●
*3
Regenerative
101
driving
*1 When "operation stop at OL signal output" is selected, the fault output "
operation stops.
*2 The OL signal and E.OLT are not outputted because fast-response current limit and stall prevention are not operating.
*3 Setting values "100, 101" can be individually set for power driving and regenerative driving. The setting value "101" disables the fast-response
current limit during power driving.
NOTE
• When the load is heavy or the acceleration/deceleration time is short, stall prevention operates and acceleration/deceleration
may not be performed according to the time set. Set the Pr.156 and stall prevention operation level to the optimum values.
• For lift applications, make settings to disable the fast-response current limit. Otherwise, the torque may be insufficient, causing
the load to drop.
412
5. PARAMETERS
5.10 (H) Protective function parameter
Fast-response
current limit
○: enabled
●: disabled
Acceleration
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○ ○
● ○
○ ●
● ●
○
● ●
○
● ●
Stall prevention operation selection
○: enabled
●: disabled
Constant speed
○
○
○
○
●
●
●
●
○
○
○
○
●
●
●
●
○
○
○
○
●
●
●
●
○
○
○
○
●
●
●
●
○
●
○
●
OL signal output
○: enabled
●: disabled
Deceleration
○ ○
○ ○
○ ○
○ ○
○ ○
○ ○
○ ○
○ ○
● ○
● ○
● ○
● ○
● ○
● ○
● ○
*2
●
—
○ ●
○ ●
○ ●
○ ●
○ ●
○ ●
○ ●
○ ●
● ●
● ●
● ●
● ●
● ●
● ●
● ●
*2
●
—
○ ○
*2
●
—
○ ○
*2
●
—
" (stop due to stall prevention) is displayed, and
*1