Braun D521 series, Product Manual, Page: 19 / 31

D521-Manual_EN_Rev07 2017_05_26 Page 19 of 31
Parameter Group P07.xx
Alarm SP4
Parameter No.
Meaning of Parameter
Setting Range of Parameter
Description of Parameters and their Settings
P07.00
Setpoint SP4
Range: 00001 .. 99999
Setpoint SP4 is programmed in the same terms (e.g. RPM) as selected for
the display of the variable in step P01.03.
P07.01
Hysteresis bandwidth of SP4
Range: 00.1 .. 99.9
(xx.x % of SP)
The hysteresis is the margin between condition "excess" (>) and "no excess"
(<), defined by its bandwidth. Without hysteresis, the alarm might be unstable
at the switching point (relay chattering) if the speed surpasses the setpoint
slowly).
The hysteresis bandwidth is set as a percentage of the setpoint.
P07.02
Hysteresis position of SP4
Range: 0 .. 1
The hysteresis band may be placed above or below setpoint. "Above"
means, the alarm goes to excess state (>), when the speed exceeds "set-
point plus tolerance", and it cancels to no-excess (<), when the speed drops
below setpoint.
"Below" means, the alarm goes to excess (>), when the speed exceeds the
setpoint, and it cancels to no-excess (<), when the speed drops below "set-
point minus tolerance".
Setting:
0 : hysteresis above SP4 (recommended when monitoring n < SP4)
1 : hysteresis below SP4 (recommended when monitoring n > SP4)
P07.03
Relay state at ' n > SP4 '
Range: 0 .. 1
Without power supply, the alarm outputs are non-conducting, and the relays
are de-energized. To consider safety aspects of the application, this No-
Power condition can be assigned to either alarm > or < condition.
Setting:
0 : relay de-energized at ' n < SP4 '
1 : relay de-energized at ' n > SP4 '
P07.04
Starter effective for SP4
Range: 0 .. 1
The starter function may be effective for each setpoint individually. Thereby it
is possible, for instance, to disable a low speed alarm during the starter
phase, whereas a high speed alarm remains active all the time.
Setting:
0 : starter not effective for setpoint SP4
1 : starter effective for setpoint SP4
P07.05
Relay state at starter condition
Range: 0 .. 1
At starter condition, the alarm may be forced to states
' n < SP4 ' or ' n > SP4' (if starter function is effective for the alarm).
Setting:
0 : ' n < SP4 '
1 : ' n > SP4 '
P07.06
Forced state SP4 at
sensor fault condition
Range: 0 .. 2
At sensor fault, the alarm may be forced to states ' n < SP4 ' or ' n > SP4'.
Setting:
0 : no forced state, state acc. to measured speed
1 : state forced to ' n > SP4'
2 : state forced to ' n < SP4 '