Inovance MD500-PLUS Series - Pre-Drive

Function Application
‑652‑
3.6.15Pre-drive
The pre‑drive function is applied to automatic reel replacement scenarios. To achieve
a shockless roll change, ensure that the linear speed of the new roll matches that of
the material when replacing a full roll with a new roll. For this purpose, enable
function 57 (Pre‑drive terminal) of the DI terminal and set the pre‑drive parameters
properly.
Accurate linear speed and roll diameter are required for this function.
Para.
No.
Name Default
Value Range Description
B0‑19
Pre‑drive frequency
gain
0.0% –100.0% to +100.0%
For pre‑drive, the running frequency is
automatically calculated based on the linear
speed and roll diameter to ensure matching with
the linear speed of the material.
For small deviation of linear speed, set B0‑19 to
increase or decrease the running frequency during
pre‑drive, ensuring accurate linear speed
matching.
B0‑20
Pre‑drive torque limit
source
0
0: F2‑09
1: Based on tension
control torque
In torque control mode, the system automatically
calculates the target torque to meet the
requirements on material tension. In regular
mode, set the target torque through F2‑09. This
parameter provides the preceding sources of
target torque in the pre‑drive mode. You can
select one according to your needs.
0: Set the target torque based on F2‑09.
1: Set the target torque based on the open‑loop
torque control mode (for mode 1 and mode 3
only).
B0‑21
Pre‑drive torque
correction
0.0% –100.0% to +100.0%
This function is activated when B0‑20 is set to 1,
and is used to correct the tension control torque
in the pre‑drive mode.
To prevent slow pre‑drive acceleration due to a
small torque limit when B0‑20 is set to 1, set a
lower torque limit in pre‑drive mode.
B0‑40
Minimum torque limit
in pre‑drive mode
0.0% 0.0% to 100.0%
Settings of these functions correspond to the
acceleration/deceleration time at minimum roll
diameter. When the roll diameter increases,
increase the acceleration/deceleration time
proportionally to avoid impact caused by
excessively quick acceleration/deceleration at a
large roll diameter.
B0‑23
Pre‑drive acceleration
time
0.0% 0.0s to 6500.0s
B0‑24
Pre‑drive deceleration
time
1.0s 0.0s to 6500.0s