Yaskawa VS-626 MC5 - Manual (Page 233)

8.2 Programming Mode Constants
- 25
Constant
Number Page
Control Methods Change
during
Opera-
tion
Factory
Setting
Setting
Range Description
Name
Constant
Number Page
Flux Vector Open Loop
Vector
Change
during
Opera-
tion
Factory
Setting
Setting
Range Description
Display
H5-05
Communication error
detection selection
Set whether or not a communica-
tions timeout is to be detected as a
communications error.
0 1 1 A A ---- H5 05
Serial Flt Dtct
0: Do not detect.
1: Detect
0 1 1 A A ----
8.2.7 Protection Constants: L
J Motor Overload: L1
Constant
Name
Setting Factory
Change
during
Control Methods
Constant
Number Display
Description
Setting
Range
Factory
Setting
g
during
Opera-
tion
Open Loop
Vector
Flux Vector
Page
L1-01
Motor protection
selection
Sets whether the motor overload
function is enabled or disabled at
electric thermal overload relay.
0: Disabled
1: Enabled
In some applications when the
Inverter power supply is turned
off, the thermal value is reset, so
0 1 1 B B - 48 L1 01
MOL Fault Select
off, the thermal value is reset, so
even if this constant is set to 1,
(Enabled), protection may not be
effective.
When several motors are con-
nected to one Inverter, set to 0
(Disabled) and ensure that each
motor is installed with a protec-
tion device. 0 1 1 B B - 48
L1-02
Motor protection time
constant
Sets the electric thermal detection
time in seconds units.
Usually setting is not necessary.
The factory setting is 150% over-
load for one minute. 0.1 to
5 0 1.0 B B - 48 L1 02
MOL Time Const
load for one minute.
When the motor’s overload re-
sistance is known, set at the
overload resistance when the
motor is hot started. 5.0 1.0 B B - 48
J Power Loss Ridethrough: L2
Constant
Name
Setting Factory
Change
during
Control Methods
Constant
Number Display
Description
Setting
Range
Factory
Setting
g
during
Opera-
tion
Open Loop
Vector
Flux Vector
Page
L2-01
Momentary power
loss detection
0: Disabled (Undervoltage fault
detection)
1: Enabled (Restarted when the
power returns within the time
for L2-02. When L2-02 is ex-
ceeded, undervoltage fault
detection )
0 to 2 0 B B - 49 L2 01
PwrL Selection
detection.)
2: Enabled while CPU is operat-
ing. (Restarts when power re-
turns during control operations.
Does not detect undervoltage
fault.
0 to 2 0 B B - 49
L2-02
Momentary power
loss ridethru time Sets the recovery time, when mo-
mentary power loss selection
(L2-01) is set to 1 in units of one
0.0 to
2 0
0.7
*1
B B - 49 L2 02
PwrL Ridethru t
(L2-01) is set to 1, in units of one
second. 2.0 *1
B B - 49
L2-03
Min. baseblock time
Sets the Inverter’s minimum base-
block time in units of one second,
when the Inverter is restarted after
power loss ridethrough.
Sets the time for the motor’s re- 0.0 to 0.5
B B 50 L2-03
PwrL Baseblock t
Sets the time for the motor s re-
sidual voltage to dissipate.
When an overcurrent occurs
when starting a speed search or
DC injection braking, increase
the set values.
0.0 to
5.0
0.5
*1
B B - 50
8