KEB COMBIVERT F5 Reference Manual page 262

TS - Terminal Slowdown Data Parameters
262
Function
The NTS input is an active low input controlled by the controller.
When the NTS input is dropped (pulse or constant), the drive will begin to
compare the encoder speed against the corresponding NTSD threshold and
direction (TS03-08).
IF the encoder speed becomes GREATER than the corresponding NTSD
speed threshold (TS03-08), then the drive will decelerate to the TS02
NTSD Target Speed using the LS33-35 One Floor profile deceleration and
jerk rates, bypassing any controller generated serial or analog profile, and
continue on until the hardware direction input is dropped then decelerate to
zero speed. If the external (analog or serial) speed command is less than
the TS02 NTSD Target Speed, the drive will follow the external command
speed but continue to limit the maximum speed to the TS02 NTSD Target
Speed until the end of the run when the hardware direction command is
dropped.
ELSE, IF the encoder speed remains LESS than the corresponding NTSD
speed threshold (TS03-08), the drive will continue as normal.
An output can be assigned (LO05-20) as NTSD Output, indicating when the
NTS slowdown is active. The output turns on when an NTS slowdown is
initiated and remains on until the direction is dropped or while the command
speed is below the TS02 NTSD Target Speed (analog or serial speed control).
Speed
LS02
High Speed
NTSD 1, 2, or 3
Speed threshold
TS02
NTSD Target
Speed
Normal Profile
NTS Input
NTSD Slowdown
LS33 - 35
Normal Profile
Direction
input
dropped
NTSD Slowdown
LS43-45