User manual

905U Wireless I/O Module User Manual

105S Serial I/O Module

Page 42 © October 2001

It is possible to map a digital input to an analog output - the output will be maximum value when the

input is on and minimum value when the input is off. It is also possible to map a analog input to an

digital output - the output will be on when the input is equal or greater than 12mA and off when the

input is less than 12mA.

Every module should have at least one mapping configured. If no inputs are being used at this

module, map an unused input or an internal input (for example, Low Volts). Map the input to an output

which is not being used. If the destination module is a 905U-2, then enter “2” in the “At Output” box

- this will allow the only output at the 905U–2 module to be used for something else.

Edit existing mappings

To edit an existing mapping, double-click on

the mapping line, or select the mapping line

and “Edit”.

To delete an existing mapping

To delete a mapping, select the mapping and

delete or right-mouse click and select Delete.

Configuring Start-Up Polls

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