Allen-Bradley 1757-FFLD2, User Manual

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34 Rockwell Automation Publication 1757-UM012A-EN-P - July 2011
Chapter 3 Create an RSFieldbus Software Project
The New Fieldbus dialog box appears.
2. Enter a tag name for the H1.
If you do not enter a tag, the default tag is Fieldbus #.
The 1757-FFLD linking device has two or four H1 ports depending on
your system requirements. We recommend that you name each tag
according to its port number. For example, H1-1 indicates that this is
Upstream Port 1.
3. Select the Upstream Port (H1 port) on the linking device to which the H1
segment is connected.
4. Click OK.
The Fieldbus (H1) is added to the Project.
Set the Macrocycle
RSFieldbus software automatically calculates the macrocyle time for a fieldbus
device to send and receive data. In many cases, you will have to increase the
macrocycle time to provide more time for background traffic, such as
downloading, monitoring, assigning tags, and other commissioning tasks.
IMPORTANT
If the macrocycle time is too short, you will receive a failure when you
attempt to download and you may not be able to add devices to
the network.