Allen-Bradley controllogix 1756-L61, Application Book

Page: 44 / 56

Publication LOGIX-AP007B-EN-P - January 2007
44 Performance Data
Access 4500 Bytes
This table shows the baseline performance of the CompactFlash card. The
application code as it is shipped was used to access 4500 bytes. All data shown
is in ms. Each command was performed 32,000 times and the highest value is
shown.
Access 4500 Bytes with an HMI Load
This table shows the baseline performance of the CompactFlash card. The
application code as it is shipped was used to access 4500 bytes. Also, a
simulated HMI load was added accessing 1500 tags every 500 ms. All data
shown is in ms. Each command was performed 32,000 times and the highest
value is shown.
Access 4500 Bytes with 16 Message Instructions
This table shows the baseline performance of the CompactFlash card. The
application code as it is shipped was used to access 4500 bytes. Also, 16
message instructions were added into the application code, each accessing 100
DINT tags from a remote controller. All data shown is in ms. Each command
was performed 32,000 times and the highest value is shown.
Access 4500 Bytes and Periodic Tasks
This table shows the baseline performance of the CompactFlash card. The
application code as it is shipped was used to access 4500 bytes. The task that
contains the CompactFlash code was made into a periodic task that executes
every second. All data shown is in ms. Each command was performed 32,000
times and the highest value is shown.
Create Command Write Command Read Command Delete Command
L6X Controllers 68 572 178 83
Create Command Write Command Read Command Delete Command
L6X Controllers 74 580 177 84
Create Command Write Command Read Command Delete Command
L6X Controllers 110 1093 483 103
Create Command Write Command Read Command Delete Command
L6X Controllers 4001 33000 29000 1001