Tension control parameter group 14
PARAMETER DESCRIPTION 265
14-36
(P.636)
is for setting the friction compensation coefficiency.Take wind-up for instance, Material tension
decreases because of friction, especially with small rolls.Also,it makes tension nonlinear.It can be improved by
setting this parameter.
5.15.6 Material outage detection
Supplementary function,not effective in all situations..
Material outage
detection
Material outage detection function 1
Material outage detection function 2
Material outage detection function 3
Minimum linear speed detection when running out of
material
Error range detection when running out of material
Delay determination when running out of material
Material outage detection
The inverter automatically detects material outage through this parameter.This is a supplementary function,which
doesn`t apply to all situations.When not being able to get good results,set 14-37
(P.637)
to 0.
Material outage detection function 1:During operation,when using linear speed to calculate winding angle ,and
system linear speed is higher than 14-38
(P.638)
,inverter will detect if there is a outage of material according to
winding radius change,14-39
(P.639)
is used to set the error level of broken material detection.
Material outage detection function 2:
In the running state, when the tension closed-loop PID is enabled and the line
speed is higher than 14-38 (P.638), the inverter detects the broken material according to the PID feedback status.
P639 (P.639) is used to set the broken PID feedback level with detection.
Material outage detection function 3:
In the running state, the tension closed-loop PID is enabled, and the inverter
detects whether the material is broken according to the position of the floating roller.
When the system linear speed is higher than 14-38
(P.638)
,winding radius error (the current winding radius variation
is too big compared to the previous winding radius) exceeds the range set in 14-39
(P.639)
,and the error time is
over the delay time set in 14-40
(P.640)
,the inverter reports material outage failure(bEb)