User manual

Chapter Five Specifications
man_905-105_2.9 Page 43
analog - if analog, the output will go to maximum value.
Although communication failure will activate the output, successful comms does not reset the output.
You must use the “Reset outputs on comms fail” option (Refer to User Options section).
Each remote module has a separate comms fail status - you enter a separate comms fail mapping for
different remote addresses. You can configure several comms fail mappings to the same output - the
output will be active if there is comms fail to any of the remote addresses. Configuring a “Comms Fail
Address” of zero causes communication failure to any destination module to be indicated on the
selected output.
For example, if “Comms fail to unit 12” is configured to DO1, then the module will set (or activate)
DO1 each time communications to unit 12 is not successful. If DO1 has a “Reset output” time of 10
minutes configured for DO1, then DO1 will reset (de-activate) 10 minutes after the last comms fail to
unit 12.
Debounce Configuration
Debounce is the
time which an
input must stay
stable before the
module decides
that a change of
state has occurred.
If a digital input
changes (say 0 →
1) and changes
again (1 → 0) in
less than the
debounce time,
then the module
will ignore both
changes. Debounce may be configured for digital inputs on the –1, -2 and -4 modules (0.5 - 8 seconds)
and the analog inputs on the -2 module (0.5 - 8 seconds). The default value of 0.5 seconds is suitable
for most applications. In applications where a digital input may turn on and off several times slowly
(for example, security switches or float switches) a debounce time of up to 8 seconds may be
configured. The configured debounce time has no affect on pulse inputs.
Note that the analog debounce is not configurable for the -1, but is configurable in the -2.
Update Time Configuration
Update messages are sent if a change message has not occurred within the update time period. The
update time may be set for each input - both physical and internal inputs.
The default period is 10 minutes for all inputs, except for pulse inputs (1 minute). Short update times
should only be used 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