Magnetek Quattro DC Elevator Drive Benutzerhandbuch

(PreTorque Latch)   If Pre-Torque latching is 
NOT selected, the Pre-Torque signal must be 
valid when the speed regulator is commanded to 
run.  For verification on timing, see NORMAL 
operating sequence on page 21. 
Some car controllers send both analog pre-
torque and speed commands . To facilitate this, 
the Drive has the option of latching the pre-
torque command. 
If pre-torque latching is selected using the Pre-
Torque Latch parameter, a FALSE to TRUE 
transition on the pre-torque latch clock latches 
the value on the pre-torque channel into the 
drive. This channel is allowed to change any 
time except during this transition without 
affecting the value of the latched pre-torque 
command

.  

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 TB).   
The speed regulator uses the latched pre-torque 
command when the internal Speed Regulator 
Release signal is asserted. Once the pre-torque 
command is used, the latch and the pre-torque 
command are cleared. 

 

 

−  latched 

−  not latched 

Y Y 

(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-Torq Latch 
signal on TB1 must be selected. 

−  external tb 

−  serial 

Y Y 

(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 tb), 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. 

−  external tb 

−  serial 

−  automatic 

Y Y 

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