Rockwell-automation Ethernet Design Considerations Reference Manual Instrukcja Użytkownika Pobierz pdf (Strona 94)

94 Rockwell Automation Publication ENET-RM002C-EN-P - May 2013

Chapter 5 Predict System Performance

Fill in the worksheet for this module as follows.

The total of 1250 is well within the 1756-EN2T/A module’s, firmware revision

2.003, remaining bandwidth of 9000 pps. The total of 22 CIP connections is well

within the 1756-EN2T/ A module’s, firmware revision 2.003, capacity of 256

CIP connections.

PanelView Plus/FactoryTalk View Connection Considerations

PanelView Plus terminals and workstation with FactoryTalk View software use

RSLinx Enterprise software for communication with a Logix controller. RSLinx

Enterprise software can open 2…5 CIP connections to a single Logix-based

controller, based on the number of tags currently on scan.

RSLinx Enterprise software opens up to four CIP connections for tag reads,

based on the volume of tags requested. If a small number of tags are on scan at one

time, for example, 80 DINT tags, only one CIP connection is opened. If a larger

number of tags are currently on scan, for example, 320 DINT tags, four CIP

connections are opened for reads.

Only a single CIP connection is opened for all tag writes.

For more information on determining the number of CIP connections required

by a given application, see Rockwell Automation Knowledgebase article 39366.

You can access the Knowledgebase at http://www.rockwellautomation.com/

knowledgebase/.

EtherNet/IP Module ID: 1

Rack-optimized Connections 5 @ 20 ms

(for digital I/O modules)

= (2 x connections)/RPI

= (2 x 5)/ 20 ms = 500

Direct Connections 15 @ 50 ms

(for analog I/O modules)

= (2 x connections)/RPI

= (2 x 15)/ 50 ms = 600

Produced Tag Connections 2 @ 20 ms

= (1 + connections)/RPI

for each produced tag

= (1 + 2)/ 20 ms = 150

Consumed Tags 0

= 2/RPI for each consumed tag

= N/A

Total Packets Per Second 1250

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 105 106

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Rockwell-automation Ethernet Design Considerations Reference Manual Instrukcja Użytkownika Strona 94