Stall Prevention Selection During Decel: L3-04; Stall Prevention Selection During Running: L3-05; Deceleration Stall Prevention Function: L3-04 = 1 - YASKAWA VARISPEED-616G5 Instruction Manual

Stall Prevention Selection During Decel: L3-04

User User
Name
Constant
Number
Stall prevention
L3-04 selection during de-
cel
Settings
D
Setting
0 Disabled. (Decelerate according to the settings. Main circuit overvoltage may occur if the decel-
eration time is too short.)
1
Enabled. (Stops deceleration if the main circuit voltage exceeds the overvoltage level. Decelerate
again when voltage recovers.)
2
Optimum deceleration. (Decelerate as fast as possible judging from the main circuit voltage.
Disregard the deceleration time setting.)
3 Enabled (with braking resistor)
When setting 1 (enabled) is selected, the deceleration time is extended automatically so that a main
D
circuit overvoltage doesn't occur.
Always select setting 0 or 3 when a braking option (Braking Resistor, Braking Resistor Unit, or Brak-
D
ing Unit) is being used. If setting 1 or 2 is selected, the braking option won't be used and the decelera-
tion time can't be shortened.
L3-04 cannot be set to 2 for open-loop vector control mode. (Settings can be made for SPEC:F and
D
later)
L3-04=3 cannot be set in open-loop vector control mode.
D
Output frequency
Fig 7.49

Deceleration Stall Prevention Function: L3-04 = 1

Stall Prevention Selection During Running: L3-05

User User
Constant Name
Number
Stall prevention
L3-05
selection during run-
ning
Settings
D
Setting
0
Disabled. (Run according to the settings. Stalls may occur with large loads.)
1 Enabled − deceleration time 1. (Use deceleration time in C1-02 for stall prevention function.)
2 Enabled − deceleration time 2. (Use deceleration time in C1-04 for stall prevention function.)
When setting 1 or 2 (enabled) is selected, deceleration is started if the current of the stall prevention
D
level during operation continues for more than 100 ms. The motor is accelerated back to the reference
frequency again when the current falls below this level.
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0 to 3 −
×
Function
Deceleration time
(setting)
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0 to 2 −
×
Function
7 - 89
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
1 B B B
The deceleration time is controlled
to prevent overvoltage.
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
B B
1
×
Flux
Vector
B
7
Time
Flux
Vector
×