R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
19/21
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
Multistep pushbutton control
The motor moves at a speed corresponding to the force applied to the direction control. The motor moves at its
slowest speed when the control is partially pushed and at its maximum speed when the control is fully pushed.
Between the fastest and slowest positions, there are other preset speeds. The motor stops moving when the
pushbutton is released. Acceleration and deceleration is smoother than with contactor control.
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.
6.1.1 Slowdown-limit
The slowdown limit reduces the speed of the crane or trolley at both ends of the runway or speed of the hook at up
or down limit. The slowdown limit signal is connected to DI4 terminal (except for MS4 and MS5 control methods).
The limit switch contact is normally closed and control voltage is connected to the input. When 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 limit value, 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 parameter P6.2 (DIA4 Function).
6.1.2 Stop-limit
The stop limit stops the crane or trolley before the end of the runway or hook at the up or down limit. The stop limit
signal is connected to DI5 terminal (except for MS4 and MS5 control methods). The limit switch contact is normally
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.
