ECU converter JetCat Version: 1.0
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2.4.4
Alarms
In the Futaba system alarms can be generated according to the set alarm thresholds for each
value in the transmitter or the Telemetry Box. In the sensors itself no alarms can be set. This is
for most sensor data also sufficient, such as an alarm for monitoring the EGT temperature.
But for alerting the fuel consumption and the speed monitoring the VSpeak ECU converter for
Futaba offers the following options:
FUEL
(s. section 2.0)
FUEL
Value range:
OFF, 10 ….2.500 ml
Step size: 10 ml
1. Setting value = OFF
Fuel is transferred 1 : 1.
However, if an alarm threshold of e.g. <800 is programmed, then, after the tank level is
lower, the alarm is also triggered - but the alarm only stops, if the transmitter is switched off.
That's why:
2. Setting value = 800ml (as example)
After lowering the tank reserve, the current value 3 x is transferred alternately for 5 seconds
as a negative value, followed by 10 seconds as normal positive value.
Rotation speed monitoring
(s. section 2.0)
Thus, the speed is displayed correctly, you have to set the speed display to type: magnet
and gear ratio 1.
RPM
Value range:
OFF, 20.000 ….99.900 rpm
Step size: 100 rpm
RPM2
Value range:
OFF, 1.000 ….99.900 rpm
Step size: 100 rpm
1. Setting value = OFF
The current speed is transfer 1 : 1.
If an alert threshold of for example <35,000 rpm is programmed in the transmitter, then the
alarm is already active at the switching on of the turbine and the receiving system. That's
why:
2. Setting value = 35.000rpm (als Beispiel)
The speed is transferred to the transmitter divided by a factor of 10. Only in the alarm case,
speeds less than the setting value are transferred 1 : 1. The alarm is active AFTER exceeding
the set value.
In the example, the speed monitoring is only activated after exceeding 35,000 rpm. The
actual 40.000rpm are displayed on the transmitter as 4.000rpm, 35,100 as 3.510rpm. If speed
decreases further then 35.000rpm speed transfer is 1 : 1. Has the transmitter an alarm
threshold set to > 15.000rpm, the alarm starts. If turbine speed falls below 15.000rpm - for
example, turbine was switched off, then the alarm stops because speed is now less than the
alarm threshold value.
Turbinenabsteller / Status
(s. Section 2.4.1)
Turbine status messages are tranmitted as numericcal "Current" values.
If in the transmitter an alarm thresold for the current of e.g. less than MINUS 1.0A is set, all
turbine shutdowns except for "RC-Off", "Auto-Off" and "Manual -Off" are signaled as a current
alarm for a period of 2 seconds.
