S: Functions For Textile Applications; S: Functions For Textile Applications; S1: Disturb Function - YASKAWA T1000V Technical Manual

5.11 S: Functions for Textile Applications

These parameters are designed specifically for textile applications. They are used to set and adjust the Disturb function,
gain levels for the frequency reference, braking transistor characteristics, and certain aspects of the KEB function.

◆ S1: Disturb Function

The S1 parameter group determines how the Disturb function operates.
■ Disturb Function
The Disturb function changes the frequency reference in periodic intervals. These changes in the frequency reference
make it possible to wind the line more evenly. Below
Figure 5.75
Frequency
Frequency Reference
Output Frequency
0 Hz
Run Command
Speed Agree 1
(H2- = 2)
Disturb Function
(H1- = 50)
During Disturb
Function Output
(H2- = 51)
<1> Once the Run command is entered, the drive speeds up to the frequency reference within the specified acceleration time (using the Accel
times 1 through 4). If triggered, the Disturb waveform is generated.
<2> When the conditions to trigger the Disturb waveform arise, the drive outputs the Disturb waveform from the soft-starter output up to the
Disturb frequency (point A) within the Disturb acceleration time set to S1-05. The drive then immediately decelerates to point C as
specified by the Disturb step (S1-03).
<3> The drive slows from point C to point B within the Disturb deceleration time set to S1-04, then immediately accelerates up to point D as
specified by the Disturb step (S1-03).
<4> The drive accelerates from point D up to point E within the acceleration time set to S1-05, then immediately decelerates to point F as
specified by the Disturb step (S1-03).
Note: 1. The top of the Disturb frequency indicated by point A is limited to the maximum output frequency set to E1-04.
2. The bottom of the Disturb frequency indicated by point B is limited to the minimum frequency reference.
Conditions for Activation of the Disturb Function
• The Disturb function must be enabled (S1-01 = 1 or 2).
• The Disturb function amplitude (S1-02), the Disturb deceleration time (S1-04), and the Disturb acceleration time (S1-
05) must be set to a value greater than zero.
• The Disturb function cannot be executed during KEB.
• The Disturb function cannot be executed when power loss has been detected.
• A multi-function input terminal set for the Disturb command (H1-
• The drive must use V/f Control to run the motor (A1-02 = 0).
Conditions that Stop the Disturb Function
Any one of the conditions below will stop the Disturb function.
• The multi-function input terminal set to activate the Disturb command (H1-
• KEB is triggered.
• The drive detects power loss.
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
S1-03 (Disturb Step)
A
L4-02
C
(Speed Agreement
Detection Width)
Disturb Start Disturb
<2>
S1-04
(Disturb Deceleration
Start <1>
Time)
Closed
Figure 5.75 Disturb Function Operation

5.11 S: Functions for Textile Applications

Figure 5.75 shows how the Disturb function operates.
F
D
B
Decel<3> Disturb Accel
<4>
S1-05
(Disturb Acceleration
Time)
ON
Closed
Closed
Closed
= 50) must be open.
E
S1-02 (Disturb Function
Amplitude)
Time
= 50) closes.
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