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Closed-loop User Switches C1
109
The Pre-Torque Latch Clock controls when the
pre-torque command is latched. The Pre-
Torque Latch clock parameter (PTorq LATCH
CLCK) determines the source of this latch
control. The two choices for latch control are the
serial channel or a logic input (EXTERNAL TB1).
The latched pre-torque command is used by the
speed regulator when the internal Speed
Regulator Release signal is asserted. Once the
pre-torque command is used the latch and the
pre-torque command is cleared.
PTorq LATCH CLCK
(Pre-Torque Latch Clock)
If the PRE-TORQUE LATCH has been set to
LATCHED, then this parameter chooses the
source for latch control. If set to EXTERNAL
TB1, the Pre-Trq Latch signal on TB1 must be
selected.
FAULT RESET SRC
(Fault Reset Source)
This parameter determines the source of the
drive’s external fault reset from one of the
following sources: an external fault reset signal
from a logic input (external tb1), a fault reset
signal transferred across a serial channel
(serial), or the drive automatically resets the
faults (automatic). The user also has the option
to reset faults directly through the operator.
Automatic Fault Reset
If the fault reset source is set to automatic, the
faults will be reset according to the setting of the
FLT RESET DELAY (A1) and FLT
RESETS/HOUR (A1) parameters. When a logic
input is defined as “fault reset” and this logic
input signal is transitioned from false to true: an
active fault will be reset and automatic fault reset
counter (defined by FLT RESETS/HOUR(A1))
will be reset to zero.
CAUTION
If the run signal is asserted at the time of a fault
reset, the drive will immediately go into a run
state. Unless using the auto-fault reset function
(FAULT RESET SRC (C1)=automatic), then the
run command needs to be cycled to be reset
automatically, but will reset if initiated by a logic
input without cycling the run command.
OVERSPEED TEST SRC
(Overspeed Test Source)
This switch determines the source of the
overspeed test. Operation of the overspeed
test function is specified by the OVRSPEED
MULT (A1) parameter. Regardless of the
setting of this parameter, the user can call for
the overspeed test via the Digital Operator.
BRAKE PICK SRC
(Brake Pick Source)
If the BRAKE PICK SRC (C1) is set to
INTERNAL, the HPV 600 will attempt to pick (lift)
the brake when magnetizing current has been
developed in the motor.
BRAKE PICK CNFM
(Brake Pick Confirm)
If this switch is set to EXTERNAL TB1, the HPV
600 will wait for brake pick confirmation before
releasing the speed reference. When set to
EXTERNAL TB1, the MECH BRK PICK signal
on TB1 must also be selected.
BRAKE HOLD SRC
(Brake Hold Source)
If set to internal, the drive will command the
mechanical brake to hold mode until
confirmation of brake picked exists.
RAMPED STOP SEL
(Ramp Stop Select)
This parameter allows the selection of the
Torque Ramp Down Stop function. This function
is used to gradually remove the torque
command after the elevator has stopped and the
mechanical brake has been set. This prevents a
shock and possible ‘bump’ felt in the elevator
from the torque signal going to zero too quickly.
A function unique to elevators involves the
interaction between the motor torque and the
mechanical brake that holds the elevator. Under
full load conditions at the end of a run, if the
brake is set and the motor torque is removed
quickly, some brake slippage may occur.
Therefore, the option of gradually reducing the
motor torque is provided by the Torque Ramp
Down Stop function.
Upon being enabled by the Ramped Stop Select
Parameter (RAMPED STOP SEL(C1)), the
torque command is linearly ramped to zero from
the value that was present when the ‘Ramp
Down Enable’ was selected.
The Ramp Down Enable has the following three
possible sources:
•
An input logic bit (EXTERNAL TB1)
•
The run logic – initiated by the removal of
the run command
•
The serial channel