Tension control parameter group 14
PARAMETER DESCRIPTION 264
14-29 is used for selecting the method or channel for obtaining linear speed.
1.
When 14-29
(P.627)
=0,there is no linear speed input.
2.
When 14-29
(P.627)
=1,linear speed is obtained through analog value or pulse input.The correct maximum
speed 14-30
(P.628)
, analog value or pulse input`s setting corresponding to maximum linear speed is required.
3.
When the linear speed (14-29
(P.627)
=2) is obtained through communication method,it is set by the modbus
communication address H100A and the setting range is 0.1~6500.0m/min..
14-31
(P.629)
is for setting the minimum speed of winding radius when the calculation starts.When the inverter
detects that the linear speed is lower than the value,winding radius calculation ceases.By correctly setting this
value,deviation of winding radius calculation when speed is reducing can be effectively avoided.This value should
be set over 20% of the maximum linear speed in general.
14-32
(P.630)
is for displaying the actual linear speed in real time.
5.15.5 Tension compensation
Only relating to opened-loop torque mode.
Mechanical inertia
compensation
coefficiency
Friction compensation
coefficiency
Tension compensation
When selecting opened-loop torque mode for tension control,during the acceleration/deceleration of the
system,additional torque shall be provided in order to overcome the moment of inertia of the
system.Otherwise,situation such as tension decrease when wind-up acceleration,tension increase when wind-up
deceleration or tension increase when release acceleration,tension decrease when release decelerate might
occur.
14-33
(P.633)
is for setting the mechanical inertia compensation coefficiency.It is used to compensate the moment
of inertia of the system, including motor, rotation system and shaft.Such inertias are fixed and are not related to the
winding radius.This parameter can be obtained automatically by self learning or by manually setting according to
the situation.
14-34
(P.634)
and 14-35
(P.635)
is related to material inertia compensation.The inverter will automatically calculate
the material inertia compensation value according to the parameter and the winding radius.