Manual

WI-I/O 9-x_WI-I/O-EX-1-S-x 2.16 Page 49
in special circumstances. It is important to remember the principle - “Less radio traffic means better
communications”. Frequent updates from multiple units causes congestion of the radio channel, which
results in increased communication failures and poorer performance of the system. To change an update
time, select “Update Times” on the left-hand menu and double-click the selected input. The update
time will be shown in days:hours:minutes:seconds. Change the values in each field. The display also
shows the maximum and minimum values. For the -1, -2 and –3 modules, the maximum update time
is 16 minutes, however the update time for -4 inputs can be up to 5 days.
If a zero value is entered as an update time, then the input will not update at all.
Changing Multiple Settings
You can change the Update Times of several inputs simultaneously by using the <Shift> Select feature.
For example, if you want to change all digital inputs to 1 minute update, you could change each
individually, or you could “block” the four digital inputs using the “Shift” Select feature and select
“Edit”. You only need to enter the change once to change all of the inputs selected. This feature is also
available with the other configurable parameters.
Output Reset Time Configuration
This allows the Comms Fail Time
to be selected - this is the time for
an output to reset if it has not
received an update or change
message.
Each output on the unit, either analog
or digital, may be configured to reset
(off or 0mA) when no update
transmission has been received for a
certain time. This option can be used
to ensure that communications failure
will not result in loss of control. For
example, outputs connected to pumps
should be configured to reset on communications failure so that the pump will turn off. The default
condition is zero (no reset).
If the reset time is less than the update time, then the output will reset when the reset time expires, and
then set again when the update message is received. We recommend that the reset time be a little more
than twice the update time.
To set an output reset time, select “Output Reset Times” on the left-hand menu and double-click the
selected input. The update time will be shown in days:hours:minutes:seconds. Change the values in
each field. The display also shows the maximum and minimum values.