Configure a module connection – Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual User Manual

Page 127

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Publication 1747-RM623D-EN-P - June 2006

Application Examples E-49

By default, outputs in all slots in the remote chassis are reset if
the processor is placed into the Program mode or if
communications is lost for any reason. The other choice offered
is Hold Last State, which means all outputs remain in their state
should one of the two conditions occur.

2. Click APPLY.

3. Click OK to return to the Scanlist Configuration screen.

Configure a Module Connection

Next, we need to configure a module connection for the
1794-IE4XOE2 4-input/2-output analog module.

1 . Right-click the 1794-IE4XOE2 module in the Scanlist

Configuration window.

2. Select Insert Connection.

A Connection Properties window appears.

3. Choose Exclusive Owner for the connection name.

For this example, we must choose M-file addresses for our 4
input/2 output analog module. The first available M-file
addresses are M1:3.3 and M0:3.3. Words 0 through 2 are
reserved.

The analog input data for the four analog inputs actually begin
at M1:3.5, because the 1794-ACNR15 module sends two words
of status information ahead of the actual data.

The output data for the two analog outputs does begin at
address M0:3.3. The next available Status Address is M1:3.600/
02, since bits 0 and 1 are used for the rack connection. The
Connection Properties window for the module connection
should look as follows:

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