905U Wireless I/O Module User Manual
105S Serial I/O Module
Page 46 © January 2011
When a unit is first turned on, its outputs
will not be set until it receives update
messages from other units in the system. To
ensure that outputs are set as soon as
possible after start-up the unit may be
configured to “Poll” any other units with
mappings to its outputs.
Select the remote unit to be polled from the
unit list, or enter the unit address in the box.
If the remote unit communicates via
repeaters, select the repeater units or enter
the repeater addresses.
Remember that if more than one remote unit
is controlling the local outputs, then more
than one start-up poll should be configured.
Configuring Comms Fail Mappings
Each module has a “comms fail” status which may be mapped to a local output. The comms fail status
is active (on) if the module is transmitting a message and does not receive an acknowledgement after
five tries. By setting the comms
fail status to a local output, you
can provide a communications
alarm. The local output can be
digital or 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.
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