Rockwell Automation 1440-RMA00-04RC XM-440 Master Relay Module - Manual (Page 65)

Rockwell Automation Publication GMSI10-UM009D-EN-P - June 2011
DeviceNet Information 65
To configure the Sharing Status
Parameters 65 to 128 (Sharing Status group) are used to enter the share status
information.
Follow these guidelines when configuring the Share Option parameter.
• If the XM-440 is the primary master of an XM measurement module,
then the Share Option parameter for the corresponding node address
must be set to "primary."
• If another master/scanner is the primary master of the XM
measurement module, and the XM-440 is to share the XM measurement
module, then the Share Option parameter for the corresponding node
address must be set to "shared."
Note that a generic master/scanner must always be the primary master
and the XM-440 must always share the slave. This is because of the way
the Scanner applet works. If the Share Option parameter is set to
"primary," the Scanner applet would not know that a primary master has
been selected for the XM measurement module (because the Scanner
applet was not used to configure the XM-440). So the Scanner applet
would not be able to enable the shared inputs function when adding the
XM measurement module to the generic master/scanner’s scan list. And
both the generic master/scanner and the XM-440 would try to be the
primary master for the XM measurement module.
IMPORTANT
There can be only one primary master of a slave. And a
slave must have a primary master before it can be shared
with another master/scanner.