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4.3.9. Critical parameters

Minimum and maximum values of currents, voltages and temperatures are used for safe controller operation. Any value out of
acceptable range leads to the motion stop, windings power-down and Alarm state for the controller. Exiting the Alarm state is possble
only after the critical parameter returns to normal and the STOP command is sent to the controller. Critical settings are used for all
motor types.

The following parameters are available:

Low voltage off defines the minimum voltage value of the controller power supply (measured in tens of mVs). The  Low voltage
protection  flag  is  used  to  turn  this  option  on,  otherwise  the  minimum  unpowering  threshold  doesn't  work.  The  6000mV  to
8000mV  range  is  sensible  for  operating  power  range  of  12V  to  48V.  This  type  of  protection  helps  to  determine  the  power-cut
moment due to activation of any sort of power supply unit protection. This may occur if the operating power consumption of the
stabilized power supply unit is exceeded.
Max current (power) defines the maximum current of the controller power supply (measured in mAs). The sensible value is twice
the  maximum  operating  consumed  current  registered  during  the  tests.  Use  the

XiLab charts

for registration of the consumed

current.
Max voltage (power) defines the maximum voltage value of the controller power supply (measured in tens of mVs). The sensible
value is 20% higher than power supply unit voltage.
Temperature  defines  the  maximum  temperature  of  the  microprocessor  (measured  in  tenths  of  degrees  Celsius).  The
microprocessor  can  operate  at  the  working  temperature  of  up  to  75ºC  and  doesn't  overheat  by  itself.  Rise  of  its  temperature
indirectly  indicates  the  overheating  of  the  power  part  of  the  board.  The  overheating  threshold  range  from  40ºC  to  75ºC  is
sensible.

Flags:

ALARM_ON_DRIVER_OVERHEATING  means  entering  the  Alarm  mode  if  the  driver's  critical  temperature  (over  125ºC)  is
exceeded. The power driver indicates if its temperature is approaching the critical value. If the driver is  still  working  then  the
further heating will automatically shut it down. It is recommended to set this flag and not to rely on automatic forced shutdown.
H_BRIDGE_ALERT  means  turning  the  Alarm  mode  on  if  any  fault  of  the  power  driver  due  to  board  overheating  or  damage  is
detected. This flag should be set on.
ALARM_ON_BORDERS_SWAP_MISSET  means  turning  the  Alarm  mode  on  if  the  triggering  of  the  wrong  limit  switch,  not
corresponding to direction, is detected (see the

Limit switches

chapter). This flag is intended for clear indication of the response

of the limit switch swap detection subsystem. The flag is recommended to be set on.
ALARM_FLAGS_STICKING  flag  activates  the  sticking  of  the  error  indicators  in  the  status  structure  of  the  controller,  otherwise
indicators  are  active  only  during  the  accident  that  caused  the  error.  If  there  was  a  short-time  error  and  its  cause  was
independently  removed,  then  sometimes  the  reason  of  Alarm  remains  uncertain.  In  that  case  the  sticking  is  useful  and  the
accident cause can get diagnosed in XiLab main window.
USB_BREAK_RECONNECT  -  This  flag  configures  the  operation  of  an  USB  break  reconnect  block.  When  set,  this  unit  starts  to
operate and monitor the loss of communication over the USB bus (for example, in case of a static discharge).

Standa 8SMC5-USB, User Manual

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