SanDisk CompactFlash 5000 Bedienerhandbuch PDF herunterladen (Seite 43)

43 Publication LOGIX-AP007B-EN-P - January 2007

Appendix

Performance Data

Introduction

This appendix describes performance data of the CompactFlash card. All tests

were done with Rockwell Automation 1784-CF64 Revision BO1 cards.

Performance with third party CompactFlash cards will vary.

Performance Data Tables

The following tables show the performance of the CompactFlash card in

varying instances.

Access 450 Bytes

This table shows the baseline performance of the CompactFlash card. The

application code as it is shipped was used to access 450 bytes. All data shown is

in ms. Each command was performed 32,000 times and the highest value is

shown.

Topic Page

Performance Data Tables 43

Access 450 Bytes 43

Access 4500 Bytes 44

Access 4500 Bytes with an HMI Load 44

Access 4500 Bytes with 16 Message Instructions 44

Access 4500 Bytes and Periodic Tasks 44

TIP

The application described in this document depends on

messaging to perform operations, such as open, read, or

write, on the CompactFlash card.

Therefore, data transfer rates will be affected by the

communications time slice and amount of other messaging

and HMI communications that is occurring in the

controller, as well as program structures, for example,

motion, periodic tasks, and event tasks.

Create Command Write Command Read Command Delete Command

L6X Controllers 67 187 52 82

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 55 56

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SanDisk CompactFlash 5000 Bedienerhandbuch Seite 43