Publication 1752-UM001A-EN-P - October 2006
Configure Your Controller for DeviceNet Communications 63
4. Select Configuration signature must match.
This selection directs the SmartGuard controller to verify that the
target safety device contains the correct configuration before
opening the safety connection.
5. Review the Connection Reaction Time Limit.
The Connection Reaction Time Limit is the maximum age of
safety packets on the associated connection. If the age of the
data used by the consuming device exceeds the Connection
Reaction Time Limit, a connection fault occurs. Adjust the
Connection Reaction Time Limit by changing the RPI or the
Advanced Communication Properties as described in Steps 6
and 7.
6. Set the requested packet interval (RPI).
The RPI specifies the period at which data updates over a
connection. The RPI is entered in 1 millisecond increments, and
the controller supports a valid range of 5…500 ms with a default
of 10 ms. Other target devices may have more limited RPI
constraints. Consult the documentation for each type of target
device to determine its supported range and incremental values.
Modifying the RPI affects the Connection Reaction Time Limit.
For simple timing constraints, setting the RPI is usually sufficient.
However, for more complex requirements, click Advanced to
further adjust the timing values affecting the Connection
Reaction Time Limit.
IMPORTANT
If you do not choose Configuration signature must match,
you are responsible for verifying the safety integrity of
your system by some other means.
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