5.11 S: Functions for Textile Applications
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 227
■ S5-05: KEB Synchronous Acceleration Time
Sets time to accelerate from the frequency after KEB to the set frequency reference. This setting can be used to let
multiple drives accelerate synchronously back to the set speed after power loss.
Note: If S5-05 is set to 0.0, the drive will use the normal acceleration times (C1-01, C1-03, C1-05, C1-07) to accelerate back up to
speed once power is restored.
■ S5-06: S-Curve at KEB Deceleration Start
Sets the S-curve time when KEB begins deceleration. Increase this setting if overvoltage trouble occurs.
Decreases if undervoltage occurs right after power loss deceleration.
■
S5-07: Frequency Gain at KEB Start during Constant Speed
Sets the output frequency reduction step applied when power loss is detected during constant speed operation and then
KEB starts.
Percent of frequency reduction = (slip frequency just before KEB) × S5-07 × 2
Increases if Uv is detected right after power loss deceleration.
■
S5-08: Frequency Gain at KEB Start during Acceleration
Sets the output frequency reduction step applied when power loss is detected during acceleration and then KEB starts.
Percent of frequency reduction = (slip frequency just before KEB) × S5-08 × 2
■
S5-09: Frequency Gain at KEB Start during Deceleration
Sets the output frequency reduction step applied when power loss is detected during deceleration and then KEB starts.
Percent of frequency reduction = (slip frequency just before KEB) × S5-09 × 2
■
S5-10: Synchronous Deceleration ov Prevention
Enables or disables overvoltage prevention during synchronous KEB operation (S4-01 = 2). If S5-10 is enabled the drive
will temporary halt the deceleration if the DC bus voltage rises too high in order to avoid overvoltage trips.
0: Disabled (requires a braking option)
1: Enabled
No. Name Setting Range Default
S5-05 KEB Synchronous Acceleration Time 0.0 to 200.0 s 0.0 s
No. Name Setting Range Default
S5-06 S-Curve at KEB Deceleration Start 0.00 to 2.50 s 0.20 s
No. Name Setting Range Default
S5-07 Frequency Gain at KEB Start during Constant Speed 0 to 300% 100%
No. Name Setting Range Default
S5-08 Frequency Gain at KEB Start during Acceleration 0 to 300% 100%
No. Name Setting Range Default
S5-09 Frequency Gain at KEB Start during Deceleration 0 to 300% 100%
No. Name Setting Range Default
S5-10 Synchronous Deceleration ov Prevention 0, 1 0
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