Gems LDS4, Operation Manual, Page: 21 / 71

15 The Setup Editor
© 2009 General Engine Management Systems Ltd.
4.4 Minimum Sensor
An output using a minimum sensor has two inputs; one for determining the minimum value (the
primary input) and a second to reset the minimum value (reset input). When the sensor is reset,
its output is cleared and the next value from the primary input is used as its output value. As
subsequent data comes in from the primary input the value is compared with the current
minimum and if it is less, the new value is set as the current minimum.
The minimum sensor has 4 different reset methods:
·
Reset on input change ON – the result is cleared when the reset input value changes from
a zero value to a non-zero value.
· Reset on input change OFF – the result is cleared when the reset input value changes from
a non-zero value to a zero value.
· Reset on input ON – the result is cleared when the reset input value is non-zero.
· Reset on input OFF – the result is cleared when the reset input value is zero.
4.5 Maximum Sensor
The maximum sensor works in a similar manner to the minimum sensor but returns the maximum
value of the primary input.
4.6 Average Sensor
The average sensor works in a similar manner to the minimum sensor but returns the average all
values of the primary input received since the last reset.
4.7 Rate Filter Sensor
An output using a rate filter checks that the rate of change of the input value does not exceed a
specified amount. If the rate of change is too high the new data is discarded. For example, if a
gauge is using a maximum sensor to show maximum coolant temperature, a rate sensor might be
used to discard any noisy data received. If the rate of change per second is set at 5, the current
coolant temperature is 100 and an input value of 120 is received 1 second after the previous
valid data was received, then the data is discarded. The value is not sent to the maximum sensor
and the maximum value will not be skewed by a spike in the data.
4.8 Limit Filter Sensor
An output using a limit filter checks that an input value never exceeds specified levels, either high
or low. This can be used to prevent invalid data from reaching other outputs or gauges. If data is
received that exceeds either of the high or low values (if specified) the data is discarded.