KEB COMBIVERT F5 Reference Manual page 263

TS - Terminal Slowdown Parameters
NTSD Timing Diagram and Example
Speed
LS02
High Speed
NTSD 1, 2, or 3
Speed threshold
TS02
NTSD Target
Speed
The diagram above and corresponding sequence (1-5) descriptions below show
an example of a normal run (A) and a run in which the NTS is initiated (B).
1. Normal slowdown initiated.
A. Motor tracks command speed.
B. Motor speed deviates from command speed.
2. NTS input dropped. Motor encoder speed compared with NTSD speed
threshold.
A. Motor speed less than or equal to NTSD speed threshold ->
1. Normal deceleration.
B. Motor speed greater than NTSD speed threshold ->
1. Initiate NTSD Slowdown using LS33-35 One Floor profile rates
2. NTSD output turns on
3. Maximum speed limited to TS02 NTSD Target Speed until end of run.
3. NTS slowdown reaches NTSD Target Speed.
A. Normal slowdown active.
B. External speed command (analog or serial) below NTSD Target
Speed allowed; NTSD Output turns off if external (analog or serial) speed
command is less than NTSD Target Speed.
4. Direction dropped.
A. Decelerate to zero speed.
B. Decelerate to zero speed.
5. Drive enable dropped.
A. End of run.
B. End of run.
NTSD Slowdown
1 2 3
Normal Profile
4 5
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