5
-66
Hardware Protection: L8
User constants for hardware protection functions are shown in the following table.
L7-06
Integral
time set-
ting for
torque
limit
Set the integral time for the torque
limit. When integral control is set for
the torque limit, reduce this setting to
increase the change in frequency for
the torque limit.
*Normally handled with PRG: 103
.
5 to
10,000
200
ms
No
No No
A
No
No
4ACH
4-21
6-46
Torq Limit
Time
L7-07
Control
method
selection
for torque
limit dur-
ing accel-
eration and
decelera-
tion
Select the control method for the
torque limit during acceleration and
deceleration.
0: Proportional control (integral con-
trol during constant speed)
1: Integral control
Normally, this constant does not need
to be set.
*Normally handled with PRG: 103
.
0, 1
0
No
No No
A
No
No
4C9H
4-21
6-46
Torque
Limit Sel
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
Display
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
L8-01
Protect selec-
tion for inter-
nal DB
resistor (Type
ERF)
0: Disabled (no overheating
protection)
1: Enabled (overheating
protection)
0 or 1
0
No
A
A
A
A
A
4ADH 6-74
DB Resistor
Prot
L8-02
Overheat pre-
alarm level
Sets the detection temperature
for the Inverter overheat
detection pre-alarm in
°
C.
The pre-alarm detects when
the heatsink temperature
reaches the set value.
50 to
130
95
°
C
*1
No
A
A
A
A
A
4AEH 6-75
OH Pre-
Alarm Lvl
L8-03
Operation
selection after
overheat pre-
alarm
Sets the operation for when
the Inverter overheat pre-
alarm goes ON.
0: Ramp to stop
(Deceleration stop using
Deceleration Time 1, C1-
02.)
1: Coast to stop
2: Fast stop (Emergency stop
using the deceleration
time in C1-09.)
3: Continue operation
(Monitor display only.)
A fault will be given in set-
ting 0 to 2 and a minor fault
will be given in setting 3.
0 to 3
3
No
A
A
A
A
A
4AFH 6-75
OH Pre-
Alarm Sel
Con-
stant
Num-
ber
Name
Description
Setting
Range
Fac-
tory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
