Allen-Bradley devicenet modules in logix5000 control systems Manual Do Utilizador
1
Publication DNET-UM004A-EN-P - March 2004
Appendix
A
Give a Value Its Own Memory Location
When to Use This Appendix
Sometimes, an input or output value for a device may end up
encapsulated within a larger tag. For example, a speed value may end
up as the upper 16 bits of a DINT element in the scanner. To access
the value, you would have to use additional programming.
encapsulated within a larger tag. For example, a speed value may end
up as the upper 16 bits of a DINT element in the scanner. To access
the value, you would have to use additional programming.
To make your programming easier, re-map the value to its own tag
within the data array of the scanner. This lets you access the value
without additional programming.
within the data array of the scanner. This lets you access the value
without additional programming.
2:I.Data[0]
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
data map for
Bulletin 160
AC drive
Bulletin 160
AC drive
Advanced mapping lets you unpack the data into several map
entries.
In this example, the upper 16 bits of the original map entry are
now in a individual tag.
When you use AutoMap, all the data for a device ends up packed
together.
together.