S3: Braking Transistor And Output Voltage Gain; S4: Keb Mode Selection - YASKAWA T1000A Technical Manual

5.11 S: Functions for Textile Applications
u S3: Braking Transistor and Output Voltage Gain
n
S3-01: Braking Transistor Operation Selection
Determines when the drive built-in braking transistor is enabled.
No.
S3-01
Setting 0: During run only
Setting 1: Always enabled
n
S3-02: Braking Transistor Operation Voltage Level
Sets the voltage level that triggers the drive built-in braking transistor.
No.
S3-02
Note: This value is for 200 V drives. Double this setting when using a 400 V class drive.
n
S3-03: Output Voltage Gain Selection
Enables and disables the output voltage gain setting in parameter H3-
register 03H.
No.
S3-03
Setting 0: Disable
Setting 1: Enable
n
S3-04: Output Voltage Gain Change Time
Sets the drive uses to change the output voltage gain set in parameter H3-
MEMOBUS register 03H.
No.
S3-04
u S4: KEB Mode Selection
S4 parameters define the conditions for how the KEB function operates.
n
KEB Function Description
Short for Kinetic Energy Backup, the KEB function helps the drive through power loss. Once power loss is detected,
KEB quickly decelerates the motor, using regenerative energy to maintain voltage levels in the DC bus. This keeps the
drive running through a momentary loss in power. Once power is restored, the drive will reaccelerate to the frequency
reference or continue to decelerate to a complete stop (depending on the S4-14 setting).
There are three ways that KEB can be performed. Parameter S4-01 determines which method is used.
KEB Mode Selection on page
Conditions that Trigger KEB
When KEB is enabled (i.e., S4-01 is not set to 0), it will be triggered by any one of the following conditions:
• A multi-function input terminal set for KEB is activated (H1-
Note: Be sure to wire this input accurately when enabling it, or the drive may go into KEB even when the power is not lost. KEB 1 will
decelerate to zero using the ramp times set in the S5 group. KEB 2 will start deceleration and will trip with a UV1 fault once the
L2-02 time has elapsed.
• Voltage in the DC bus has fallen below the level that trips KEB (set in S4-03).
• Voltage fluctuation in the DC bus exceeded the level that trips KEB (set to S4-04).
• Phase loss was detected as defined by the phase loss detection level (S4-08) and the detection time (S4-10).
252
Name
Braking Transistor Operation Selection
Name
Braking Transistor Operation Voltage Level
Name
Output Voltage Gain Selection
Name
Output Voltage Gain Change Time
255.
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
Setting Range
0, 1
Setting Range
300 to 400 Vdc
= 41 (Output Voltage Gain) or in MEMOBUS
Setting Range
0, 1
= 41 (Output Voltage Gain) or in
Setting Range
0.0 to 10.0 s
= 65 or 66).
Default
0
Default
394 Vdc
Default
0
Default
0.5 s
Refer to S4-01: