WI-I/O 9-K
v1.9
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 WI-I/O K has transmitted a message, it cannot transmit another
