Rockwell Automation 2711 PANELBUILDER SOFTWARE USER MANUAL - Manual (Page 90)

Planning Your Application
Chapter 4
4-15
Address
To define the object’s PLC address, you must determine whether the
address is discrete or block transfer; whether it’s an input or output
address; the rack or file number; the word number; and the bit number, if
applicable.
Some objects require additional I/O addresses. If so, use one line in the
Object Address List for each PLC address and use the Name column to
describe the function of the additional address.
Discrete or Block Transfer—either discrete or block transfer addresses
can be assigned to any object. In the D/B column, “D” refers to a
discrete address, and “B” refers to a block transfer address.
To assign discrete I/O addresses to PanelView objects, use the actual
PLC I/O image table address. The address must be within the range of
the I/O rack number assignments being configured for the PanelView
terminal.
The 1747-SN I/O subscanner module converts the I/O image table
address assigned in PanelBuilder into a special format in the SLC-5/02.
If you are using this scanner, see the section on SLC Addressing for
PanelView Applications in Appendix A, PLC Programming
Consideration.
With block transfer addresses, you designate Block Transfer File
Number (1–5). The word number specified here is not that of any
particular PLC address; it is the word offset (0–31) in the block transfer
Read or Write file. The block transfer instructions in the PLC program
determine where in the PLC data table the files will be read from and
written to. This concept also applies to 1771 Intelligent I/O Modules
that support block transfer.
The following entries are included in the Block Transfer and PLC table.
Input or Output specifies whether the assigned address is an Input (I)
“read” address, or an Output (O) “write” address.
Rack or File Number identified in the “R/F” column to specify the
Rack Number (octal) for a discrete address, or the Block Transfer File
Number (1–5) for a block transfer address.