User manual

905K Radio Telemetry Module User Manual
 ELPRO Technologies Pty Ltd 2010 Page 36
4.2 Update Transmission Times
Each input signal has an
update time. If a change has
not occurred for this input
within this time, then a
transmission is set for this
input after the update time has
expired. Each input signal has
its own timer - when a
transmission occurs for this
input (either a change
transmission or an update
transmission) the timer is reset
to zero. If the timer reaches
the Update Time value, then a
update transmission occurs.
Digital inputs (both external
inputs and internal) have a
separate update time for their
"off" state and "on" state.
This allows the input to be
reported differently depending on its state. If the digital input is an alarm, then a user may wish
the input to be updated more frequently when in the alarm state than when not in the alarm state.
The analog input and pulsed inputs only have one update time value.
Valid values are 10 seconds to 7days. If less than 10 seconds is entered, the value will default to
“disabled”. If “disabled” is selected, then there will be no updates for this input.
4.3 Digital Inputs
Apart from update times,
the only configurable
parameter for digital
inputs is the paralysis
time. This parameter
can be changed by
selecting the Unit details
option.
If a value of zero is
entered, then there is no
paralysis time.
The default value is 0.5 sec and will cover most applications.
A paralysis time is useful in large systems when a lot of inputs can change at the same time.
Once a 905K has transmitted a message, it cannot transmit another message during the paralysis