Installation guide

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Cooper Bussmann BU-905U-L Wireless I/O Configuration Manual

How to Configure a Mapping

Mappings configure when to send specific information to another module and how the data is sent. You can send input data:

• When the input values change (also called “Event reporting”); or

• Event reporting and on a timed basis (also called “Timed Update”).

Mappings cause the BU-905U-L-T to transmit messages when any of the inputs used by the mapping change state. You can also configure your

unit to send messages if there are no state changes for a while.

Featur

e Description

Mapping Name Optional user-defined name for the mapping.

NOTE: BU-Config only stores the mapping name in the configuration file; the mapping name is not transferred to the

module during configuration. This means that loading a module will not reproduce any user-defined names assigned to

the mappings.

Transmit Count Number of times to transmit the same message. For example, if you set Transmit count to 1, the BU-905U-L-T

transmits the message once, if you set the value to 2, the BU-905U-L-T transmits the message twice, etc.

Setting the transmit count to a higher number (up to 8) helps the message arrive at its intended destination if the radio

path is “marginal.” For large systems, excessive transmissions may cause slow response. Cooper Bussmann

recommends setting a transmit count of 2 or 3 for good radio paths, and 4 or 5 for poor radio paths.

Delay Before Tx Number of seconds to wait after the mapping is triggered before transmitting the message. For example,

if you set Delay Before Tx to 5.0, the BU-905U-L-T waits 5 seconds before transmitting the message.

Setting a longer Delay Before Tx (up to 127 seconds) helps synchronize closely spaced changes to different inputs

sent in a single message. Once the mapping is triggered, the BU-905U-L-T incorporates any changes to the state of

inputs during the Delay Before Tx period in the message that is sent.

Update Time If a “change” trigger does occur not in the Update Time, the BU-905U-L-T triggers the mapping and transmits the

message. This is known as an “Update message.”

Whenever the mapping is triggered (by either a change or an update), the BU-905U-L-T restarts the timer.

For example, if you set Update Time to 0:2:30:00, the BU-905U-L-T sends the message 2.5 hours after the last time it

was sent unless a change of state causes the mapping to be triggered before this time elapses.

Paralysis Time Minimum number of seconds to delay after sending a message before the mapping is re-sent. For example, if you set

Paralysis Time to 300 seconds, the BU-905U-L-T will not transmit a message for 300 seconds after sending the last

message sent. If the mapping is triggered during this time, the BU-905U-L-T delays transmitting the message until the

Paralysis Time has passed. This forces a limit on the number of transmissions that can occur.

Disable Lets you enable/disable the Update Timer and the Paralysis Timer.

From Inputs This selects the actual input data the BU-905U-L-T will send. The BU-905U-L-T sends data to the output module in the

order listed.

Select the inputs you want to send to the remote module by dragging them from the Available Inputs box or by double-

clicking the relevant inputs. Alternatively you can right click on the inputs in the Available Inputs list and select Add to list:

Any of the available inputs can be added to the From Inputs box in any order, including the

same input multiple times. You can change the order for sending inputs by clicking and

dragging the items up and down to different locations in the list. The pulsed inputs are

32-bit values with the top 16 bits in the ‘high’ inputs.

To remove an input from the list, select the input and from the shortcut menu select

Delete:

To invert an input, select the input in the From Inputs box. Press Ctrl+I or right click on the

input and select Invert from the list:

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