89
NTT 240/460
Operation mode
Installation and user guide
Rev: 4.0
Analog input setting, related to auxiliary speed control, is shown in picture below:
Parameters to set are:
• maximum added value for reachable
speed (back and forth operation)
when analog input voltage value
matches with ±10V scale value
(example: ±3000RPM).
• speed offset useful to compensate
any external signal offset.
Limit torque function, related to auxiliary speed control, is shown in picture below:
!
NOTES:
•
please pay attention to any activated digital input set for torque limit function.
6.10 Speed ramps
Acceleration and deceleration ramps management is enabled only with speed control in any operation mode.
Drive performs ramps at any reference change.
Acceleration and deceleration ramps enabling and setting are shown below:
After ramps enabling, acceleration and deceleration values must be set, as RPM/s, both clockwise (CW) that
counterclockwise (CCW): so, knowing
T
RAMP-V
time to reach
N
RPM-V
operating speed, acceleration and deceleration
parameters (
RAMP-V
) are provided by following formula:
Summary of Contents for NTT 240
Page 129: ......
