Rockwell Automation 1753-DNSI DeviceNet Safety Scanner for GuardPLC Controllers - Manual (Page 46)

Publication 1753-UM002A-EN-P - July 2005
5-4 Configure DeviceNet Nodes and Connections
The Add Safety Connection dialog allows you to configure a
connection.
1. Select the desired connection by choosing the Connection
Name.
2. Select a type of connection, either Multicast (input connections
only) or Point-to-point (input or output connections).
3. Select ‘Configuration signature must match’. This selection
directs the scanner to ensure that the target safety device
contains the correct configuration before opening the safety
connection.
4. 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 5 and
6.
5. 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 scanner supports a valid range of 5 to 500 ms with a default
IMPORTANT
If you do not choose ‘Configuration signature
must match’, you are responsible for ensuring
the safety integrity of your system by some
other means.