R&M Materials Handling VARIABLE SPEED CONTROLS ControlMaster Elite Manual - Manual (Page 8)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
!
: (937) 328-5100
FAX: (937) 325-5319
8/31
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
1.5 Functional description
See circuit diagrams for following descriptions of operation.
Operation when power
is switched on
− Limit switches S11, S12, S21 and S22 are assumed to be closed, as
well as the emergency stop button ES.
− The control voltage is supplied to A1 control inputs (external
42V…230V control voltage). The main voltage is connected to
inverter power supply and inverter wakes up. If the control voltage is
connected to RDY-signal and the fault circuit is OK, inverter is ready
to operate in about 1-2 seconds.
− If either one of the direction signals S1 or S2 is on, the display shows
F6 and driving can begin only after the direction signals have been off
for a while.
Normal operation – For the description of the speed reference setting see chapter 1.6
"Control methods".
– Driving starts when switch S1 (S2) closes. Closing the contact ROB2
on A1 energizes K7, which opens the brake (in models 055F-110F
the brake can be controlled also by K71). D2H and D2C accelerate
according to the acceleration ramp setting to the selected speed.
– When the switch S1 (S2) opens, D2H and D2C stop according to the
deceleration ramp setting and the brake closes.
– R1 dissipate the regenerated energy during deceleration and lowering
periods. The power supply to R1 is controlled by A1. If the braking
resistor fan(s) are included in external resistor unit, they start to
operate when power is supplied to the braking resistors. The cooling
continues about 4-5 minutes after electrical braking to ensure that the
temperature of the resistors drops below 150
°C (302°F).
Other features – Slowdown limit switches S11 and S21 provide position dependent
frequency limiting.
– Any reason, which opens the contact RDY, stops the operation of
inverter A1.
– In case of overload, motor overheating etc. the hoisting can be
disabled by cutting the direction signal in terminal X1:8.
– Thermistor relay function, which can be used when needed.
– When the stop limit switch S12 or S22 opens, K7 (K71 in models
055F-110F) de-energizes and the mechanical brake stops the motion.
– Independent speed supervision unit, SSU.
– The speed measurement and supervision can be done either with
encoder, bearing encoder or proximity switch. The measured signals
are square wave pulses. The frequency of the pulses is proportional
to the speed of the motor and if the frequency is too high, overspeed
is detected. If there are no pulses a stall situation is detected. If the
actual speed differs too much from the supply frequency of the motor,
the speed difference supervision stops the motion.
– Proximity switch buffer amplifier amplifies the sensor pulses and
filters out disturbances. The amplifier is located close to the sensor.
– The extended speed range ESR can be used, if the signal FWE (field
weakening enabled) is on. Then it is possible to drive up to twice the
nominal speed depending on the application.