R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist TMU Motorized Trolley - Manual (Page 26)

LM TMU I&M MANUAL/EN/06.15.2009
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Copyright © (2009) R&M Materials Handling, Inc. All rights reserved.
Acceleration and Deceleration Ramp Time
The acceleration and deceleration ramp times are set using switch S3 as follows:
Table 10. Acceleration and Deceleration Ramp Time Switch Settings
Switch S3 Acceleration/Deceleration
-1 -2 -3 -4 ramp time
0 0 0 0 2.5 sec (default)
0 0 0 1 3.5 sec
0 0 1 0 3.0 sec
0 0 1 1 5.0 sec
1 0 0 1 4.0 sec
1 0 1 1 6.5 sec
1 1 0 0 4.5 sec
1 1 0 1 6.0 sec
1 1 1 0 5.5 sec
The default setting for the acceleration and deceleration ramp time is 2.5 seconds. The acceleration ramp
time always equals the deceleration ramp time. Do not reset ramp time below 2.5 seconds.
The TMU VFD stopping method is always the Deceleration to stop (dynamic braking) and extreme caution
should be used taking into consideration the value of switch S3. If the deceleration time is too long,
crane/hoist can crash into the end stops, causing damage to equipment or injury to personnel.
4.2.2 Speed Control Mode
The TMU VFD provides the user with the flexibility of selecting either Two-step Multi-Speed Control (MS-2)
or a Two-step Infinitely Variable (EP-2) mode. Switch S4-1 sets the speed control mode.
Multi-Speed Control Mode (MS-2) (S4-1 = OFF)
The TMU VFD features 2-step Multi-Speed Control Mode and Decelerate to Stop using dynamic braking
stopping method.
y S1 input is RUN Forward. Frequency output increases to frequency set by DIP switch S2. Operation
continues at this frequency (minimum speed).
y S2 input is RUN Reverse. Frequency output increases to frequency set by DIP switch S2. Operation
continues at this frequency (minimum speed).
y SP2 input/second speed command. Frequency (speed) output increases to frequency set by DIP switch
S1. Operation continues at this frequency (maximum speed).
y Upon removal of SP2 input/second speed command, the frequency (speed) output decreases to
frequency set by DIP switch S2. Operation continues at this frequency (minimum speed).
y Upon removal of S1 input and S2 input (Run Forward/Reverse), the stopping method is Decelerate to
Stop. Output frequency decreases and the inverter decelerates to zero. Then the brake sets.