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8.16 Terminal Slowdown Parameters (TS)
8.16.1 Overview
The terminal slowdown parameters configure the settings for inputs assigned as Normal
Terminal Slowdown (NTS) inputs (LI04-11).
The purpose of the NTS inputs is to provide an expedited and/or an alternate slowdown
means when the elevator speed approaching a terminal landing is greater than a defined
level. If this level is exceeded, the drive will perform an NTS stop, otherwise the drive will
continue as normal.
Up to three NTS speed thresholds in each direction can be set with each input
corresponding to an NTS speed threshold, or two inputs can be binary-coded (TS01
NTSD Mode). This provides multiple checks during slowdown as the contract speed
increases.
Figure 31. NTS slowdown diagram
8.16.2 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 until the hardware direction
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