Mitsubishi Electric 800 Series Instruction Manual page 335

(H) Protective function parameter
Disabling the stall prevention operation and fast-response current limit
according to operating conditions (Pr.156)
• Referring to the table below, enable/disable the stall prevention operation and the fast-response current limit operation, and
also set the operation at OL signal output.
Fast
response
Pr.156
current limit
setting
: enabled
: disabled
0

(initial value)
1 

2
3 

4
5 
6 
7 

8
9

10 
11 

12
13 

14
15 

100



When "operation stop at OL signal output" is selected, the inverter stops its operation at the OL signal output (stall prevention stop).

The OL signal and E.OLT are not outputted because fast-response current limit and stall prevention are not operating.

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. In such case, set the Pr.156 and the 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.
334
PARAMETERS
Stall prevention
operation selection OL signal
: enabled output
: disabled
operation
continued
operation
stopped
   
   
  

   
  

  

   
 
 
  

  

   
 
 
 
 
   

  
   ―

   
   ―

:
response
Pr.156
current limit
setting
: enabled
:
: disabled


16
17 

18
19 

20
21 
22 
23 

24
25

26 
27 

28
29 

30
31 

101


Stall prevention
operation selection
: enabled
Fast
: disabled
  
  
 

  
 

 

  

 
 

 

  

 

 
  
  
  
  
  
OL signal
output
:
operation
continued
:
operation
stopped
















―


―
