Rockwell-automation Ethernet Design Considerations Reference Manual Uživatelský manuál stáhnout pdf (Strana 97)

Rockwell Automation Publication ENET-RM002C-EN-P - May 2013 97

Predict System Performance Chapter 5

Each of these controllers consumes one produced tag at an RPI = 20 ms.

Either of these EtherNet/IP modules uses these connections.

The total of 100 pps is well within the 1756-EN2T/A module’s, firmware

revision 2.003, remaining bandwidth of 9000 pps.

Recommendations to Achieve More Throughput in an Existing

Control System

Unlike the configuration of the last example control system, some control system

configurations do not initially have enough bandwidth to achieve the

desired throughput.

If you determine your control system does not have the bandwidth to achieve the

desired throughput, you need to modify your system. We recommend that you

use one of these tasks described in step 5 on page 81

, to increase system

throughput.

EtherNet/IP Module ID: 2 or 3

Produced Tag Connections 0

= (1 + connections)/RPI

for each produced tag

= N/A

Consumed Tags 1 tag @ 20 ms

= 2/RPI for each consumed tag

= 2/20 ms = 100

Total Packets Per Second 100

1 2 ... 92 93 94 95 96 97 98 99 100 101 102 ... 105 106

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Rockwell-automation Ethernet Design Considerations Reference Manual Uživatelský manuál Strana 97