21
Allocating Network Bandwidth Usage and Calculating the Best EPI
Section 2-2
Display Details and Operation
2-2-3
Allocating Network Bandwidth Usage Rates and Calculating Best
EPI
The average EPIs for safety I/O communications and standard I/O communi-
cations and the best communications cycle time are calculated by entering
the network bandwidth usage rate for each type of communications into the
Network Configurator.
Calculate the best average EPIs and the best communications cycle using the
following procedure. The network configuration might need to be changed if
the required communications characteristics cannot be achieved.
1.
Make the required settings for the virtual network on the Network Configu-
rator, including creating programs for the Safety Network Controller.
2. Click the
Calculate EPI
Button at the bottom of the Network Configuration
Window. The Calculate EPI Dialog Box will be displayed.
3.
Input the network bandwidth used in safety I/O communications and the
bandwidth used in standard I/O communications.
•
If using only safety I/O communications:
Input the network bandwidth used by the safety connections as 90%
or less and input 0% for the network bandwidth used by standard con-
nections.
Item
Description
#
IP address
Comment
Device name
Usage of Capacity
Displays the present percentage of the send/
receive packet processing capacity that the device
supports.
Mbit/s
Number of bits presently processed per seconds
by the Ethernet port for a device.
Usage of IP multicast addresses Number of multicast addresses used.
Set Packet Interval (RPI) Button This button is not used for DeviceNet Safety-Ether-
Net/IP systems.
Close Button
Closes the Usage of Device Bandwidth Dialog Box.
Summary of Contents for DeviceNet Safety
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