Function Application
‑656‑
Parameters for tension closed-loop torque control mode
You can set the tenson in closed‑loop torque control mode by using PID alone or
main torque + PID.
Para.
No.
Name Default
Value Range Description
B0‑38
Closed‑loop speed
control limit selection
0
0: Torque calculated
through pure PID
1: Torque calculated
through main + PID
The main torque is the torque calculated when
B0‑00 is set to 1.
In pure PID mode, the set friction and inertia
compensation are still valid, but the tension
torque is invalid.
In main + PID mode, set the tension
corresponding to the condition that the PID
feedback value indicates 100.0% and input B1‑
02.
3.6.18Related I/O Functions
Functions of DI terminals
You can select DI functions by using parameters F4‑00 to F4‑09 or virtual DI terminals.
1. DI function 53: Revolution count signal
When roll diameter is calculated based on accumulative thickness, set this function
for the DI terminal to input revolution count signals from the terminal.
2. DI function 54: Roll diameter reset
Roll diameter reset during reel replacement is necessary for tension control. It
ensures accurate roll diameter at the moment when the system is started after reel
replacement, and also ensures normal system startup and proper material tension.
3. DI functions 55 and 56: Initial roll diameter selection terminals 1 and 2
These functions provide initial roll diameter switchover modes to meet different
requirements for different reels or materials. For details of use, see B0‑10.
4. DI function 57: Pre‑charge input terminal
When the terminal is activated, the AC drive is switched to the pre‑charge speed
control mode. When the terminal is deactivated after reel replacement, the tension
control can function properly.
5. DI function 58: Winding/unwinding switchover
Winding/unwinding switchover is performed without modifying the parameter,
greatly facilitating the operation. For details of use, see B0‑01.
6. DI function 59: Roll diameter calculation disabled
When the terminal is activated, the roll diameter calculation is disabled.
7. DI function 60: Tension control mode disabled
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