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
101
Regenerative driving ●
*1
When "operation stop at OL signal output" is selected, the fault output "E.OLT" (stop due to stall prevention) is displayed, and operation stops.
*2
The OL signal and E.OLT are not output 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.
Fast-response
current limit
○: enabled
●: disabled
Acceleration
○
○
●
●
○
○
●
●
○
○
●
●
○
○
●
●
○
○
●
●
○
○
●
●
○
○
●
●
○
○
●
●
○
●
○
●
Stall prevention operation selection
○: enabled
●: disabled
Constant speed
○
○
○
○
○
○
○
○
●
○
●
○
●
○
●
○
○
●
○
●
○
●
○
●
●
●
●
●
●
●
●
●
○
○
○
○
○
○
○
○
●
○
●
○
●
○
●
○
○
●
○
●
○
●
○
●
●
●
●
●
●
●
●
●
○
○
●
●
○
○
●
●
Operation during
stall prevention
○: continued
●: stopped
Deceleration
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
*2
—
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
*2
—
○
*2
—
○
*2
—
12. (H) Protective Function Parameters
12.10 Stall prevention operation
11
12
*1
13
14
15
16
17
18
19
20
297