Installation manual

Configuration Mode (ConF)
S1A28692 03/2010 223
Function parameters
These define the cycle of frequency variations around the base reference, as shown in the diagram below:
Reel parameters:
trC [Yarn control] (trC): Assignment of the traverse control command to a logic input or to a communication bus
control word bit
trH [Traverse freq. high] (trH): in Hertz
trL [Traverse Freq. Low] (trL): in Hertz
qSH [Quick step High] (qSH): in Hertz
qSL [Quick step Low] (qSL): in Hertz
tUP [Traverse ctrl. accel.] (tUP): time, in seconds
tdn [Traverse ctrl. decel] (tdn): time, in seconds
tbO [Reel time] (tbO): Time taken to make a reel, in minutes.
This parameter is intended to signal the end of winding. When the traverse control operating time since
command [Yarn control] (trC) reaches the value of [Reel time] (tbO), the logic output or one of the relays
changes to state 1, if the corresponding function [End reel] (EbO) has been assigned.
The traverse control operating time EbOt can be monitored online by a communication bus.
dtF [Decrease ref. speed] (dtF): Decrease in the base reference.
In certain cases, the base reference has to be reduced as the reel increases in size. The
[Decrease ref. speed] (dtF) value corresponds to time [Reel time] (tbO). Once this time has elapsed, the
reference continues to fall, following the same ramp. If low speed [Low speed] (LSP) is at 0, the speed
reaches 0 Hz, the drive stops and must be reset by a new run command.
If low speed [L
ow speed] (LSP) is not 0, the traverse control function continues to operate above
[Low speed] (LSP).
t
tUP
trH
tdn
qSH
qSL
trL
Motor speed
Base
reference
Frequency jump
Frequency jump
0
Base reference
Motor speed
With LSP = 0
tbO
dtF
Motor speed
Base reference
With LSP > 0
dtF
tbO
0
0
t
t
LSP
Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: [phone]-Outside Local Area: [phone]-www.stevenengineering.com