Goodrive350 IP55 High-ingress Protection Series VFD
Basic Operation Instructions
-119-
V
Unwinding in torque mode
Winding in speed mode
5.5.20.2 Speed control
The detection feedback signal is needed in the closed-loop adjustment. PID calculation is
carried out according to the feedback signal for the motor speed regulation, linear speed and
stable tension control. If the tension rocker or floating roller is used for feedback, changing the
set value (PID reference) may change the actual tension, and at the same time, changing the
mechanical configuration such as the tension rocker or floating roller weight can also change
the tension.
The control principle is as follows.
Calculate the frequency
according to the linear
speed
PID regulation
+
+
Linear speed
Tension reference
Tension feedback
Basic reference frequency
Inching
frequency
Motor reference
frequency
+
-
Related modules:
(1) Linear speed input module: It is important for the calculation of the basic setting frequency
according to the linear speed and the calculation of roll diameter according to the linear speed.
(2) Real-time roll diameter calculation module: The calculation accuracy of roll diameter
determines the control performance. The roll diameter can be calculated according to the VFD
output frequency and the linear speed. In addition, it can also be calculated through the
thickness or sensor. The linear speed is widely used for the calculation. If the set linear speed
is used for the calculation, you you choose whether to enable the function of roll diameter
change limiting.
(3) PID regulation module: There are two groups of PID parameters in P09. The linear speed
synchronization and stable tension can be kept through PID regulation. PID parameters can be
modified based on site commissioning. The two groups of PID parameters can be switched for
PID regulation improvement.
(4) Material feeding interrupt detection and processing module: The function is valid when
material feeding interrupt detection has been enabled.
(5) Pre-drive: This function is applied to automatic reel change. After the VFD is started if the
pre-drive function terminal is valid, the roller runs at the set linear speed. When the terminal is
invalid, the VFD will automatically switch to the corresponding control mode after a period of
time.
Содержание GD350-004G/5R5P-45-AS
Страница 1: ...Goodrive350 IP55 High ingress Protection Series VFD ...
Страница 372: ...202008 V1 0 6 6 0 0 1 0 0 7 4 8 202203 V1 3 ...