R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster NXT Service Manual - Manual (Page 44)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
44/53 R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
CAUTION
When a pushbutton is pressed or released, the movement will accelerate or
decelerate smoothly. The operator SHALL account for the starting and
stopping distances before making crane movements.
MS2 Multistep 2 pushbutton control
The motor moves at a speed corresponding to the pushed step of the pushbutton. The motor moves at its slowest
speed when the pushbutton is partially pushed and at its maximum speed when the pushbutton is fully pushed.
The motor stops moving after ramp time when the pushbutton is released.
NOTICE
When a pushbutton is pressed or released, the movement will accelerate or
decelerate smoothly. The operator SHALL account for the starting and stopping
distances before making crane movements.
7.1.2 Slowdown-limit
The slowdown limit reduces the speed of the crane or trolley at both ends of the runway. The slowdown signal input
is connected to terminal DI4. In a normal state the limit switch contact is closed and control voltage connected to
the input. When the limit switch contact is opened, the slowdown function is activated.
The slowdown function limits the output frequency. If the driving frequency is higher than the set slowdown
frequency, the frequency converter decelerates to the slowdown frequency. Movement is possible between the
slowdown frequency and minimum frequency. The movement speed is reduced in the running direction or both
directions, depending on the setting of switch S4-2.
7.1.3 Stop-limit
The stop limit stops the crane or trolley before the free runway ends. The stop limits are connected in series to
direction input S1 and S2. In a normal state the limit switch contact is closed. When the limit switch contact is
opened the motion stops with ramp.Movement is possible only in the opposite direction when the stop limit function
is active.