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FW-F093-P-M_v0404_01_EN.docx
2.4
CALCULATION
The engine speed is calculated by measuring the time between a
number of pulses, for example 10 pulses. The more pulses the
more accurate the engine speed will be. The maximum value is
255 pulses.
This setting does influence the update time for the analog output
directly (maximum update 10 times a second). If the output
response is too slow, decrease the number of pulses.
The lower the number of pulses, the higher the power
consumption of the unit will be (important for battery powered
applications).
For low frequency applications (below 10Hz): do not program
more than 10 pulses else the update time will be very slow.
For high frequency application (above 1kHz) do program a value
of 100 or more pulses.
2.5
CUT-OFF
With this setting, you determine a minimum RPM requirement
threshold, if during this time less than XXX-pulses (SETUP 2.4)
are generated, the engine speed will be displayed as zero.
The cut-off time has to be entered in seconds - maximum time is
999 seconds (about 15 minutes).
3.3.4
EXPLANATION OF SETUP-MENU 3 - ALARM
SETUP
FUNCTIONS
AND
VARIABLES
3
ALARM
3.1
ALARM
With this setting you determine whether the alarm system is active or
not. The individual alarms can also be activated or not.
The following can be selected:
DISABLE - ENABLE
3.2
RPM ZERO
When the engine speed is zero, then it is possible to ignore or disable
the engine speed monitoring. The following settings can be selected:
DEFAULT:
in case of a low-engine speed alarm, it will switch the
alarm output and indicate the alarm on the display.
NO RELAY: in case of a low-engine speed alarm, it won't switch the
alarm output but will indicate the alarm on the display
only.
IGNORE:
in case of a low-engine speed alarm, it won't switch the
alarm output and nothing will be indicated on the
display.
3.3
ALARM LO
The low alarm is set with this setting. An alarm will be generated as
long as the engine speed is lower as this value.
With value 0.0 this function is disabled.
3.4
ALARM HI
The high alarm is set with this setting. An alarm will be generated as
long as the engine speed is higher as this value.
With value 0.0 this function is disabled.
3.5
DELAY LO
An alarm generated by SETUP 3.
2 “low” can be ignored during X-time
period. If the actual engine speed is still incorrect after this delay time,
then an alarm will be generated.
3.6
DELAY HI
An alarm generated by SETUP 3.
3 “high” can be ignored during X-
time period. If the actual engine speed is still incorrect after this delay
time, then an alarm will be generated.
3.7
ALARM HR
The running hours alarm is set with this setting. An alarm will be
generated when this value of running hours is met.
With value 0.0 this function is disabled.
3.8
REL OUT
One transistor or relay output is available to transmit the alarm
condition. Assign with this function the type of alarm to be transmitted:
low engine speed alarm, high engine speed alarm, both these alarms
or total running hours.
