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Basic Functions
3
INVERTER FUNCTIONS
3.3.9 key rotation direction selection (Pr. 17)
3.3.10 Stall prevention function and current limit function
(Pr. 21, Pr. 22)
Used to choose the direction of rotation by operating the key of the
operation panel.
Parame
ter
Name
Factory
Setting
Setting
Range
Remarks
17 RUN key rotation direction selection 0 0, 1
0: Forward rotation
1: Reverse rotation
You can make setting to disable stall prevention caused by overcurrent and to
prevent the inverter from resulting in an overcurrent trip if an excessive current
occurs due to sudden load variation or ON-OFF, etc. in the output side of the
running inverter.
• Stall prevention
If the current exceeds the limit value, the output frequency of the inverter is
automatically varied to reduce the current.
• Fast-response current limit
If the current exceeds the limit value, the output of the inverter is shut off to
prevent an overcurrent.
Parame
ter
Name
Factory
Setting
Setting
Range
21 Stall prevention function selection 0 0 to 31, 100
Pr. 21
Setting
Fast-
Response
Current
Limit
#
:
Activated
!
!!
!
: Not
activated
Stall
Prevention
Operation
Selection
#
:
Activated
!
!!
!
: Not
activated
OL Signal
Output
#
:
Operation
continued
!
!!
!
:
Operation
not
continued
(*)
Pr. 21
Setting
Fast-
Response
Current
Limit
#
:
Activated
!
!!
!
: Not
activated
Stall
Prevention
Operation
Selection
#
:
Activated
!
!!
!
: Not
activated
OL Signal
Output
#
:
Operation
continued
!
!!
!
:
Operation
not
continued
(*)
Acceleration
Constant
speed
Deceleration
Acceleration
Constant
speed
Deceleration
0
# ### #
9
!##!#
1
! ### #
10
#!#!#
2
#!###
11
!!#!#
3
!!###
12
##!!#
4
##!##
13
!#!!#
5
!#!##
14
# !!! #
6
#!!##
15
! !!! #
7
!!!##
16
# ### !
RUN
RUN