Assignment command – Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 User Manual

Page 86

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Addressing DH and DH+ Data Transfers

Chapter 5

5-12

Figure 5.10

Example Assignment Command that Addresses a Remote Station

#H024 $B45:21 = $I12:33

11242

Address Delimiter
Remote Station Number (octal)

Remote Station Delimiter

Destination Address

Assignment Command

Source Address

Data Highway Port Identifier

Address Delimiter

You can use the assignment command to copy data from a source location
to a destination location (Table 6.D). Source types include:

direct values
procedural user symbols
interprocedural user symbols
logical addresses
local symbolic addresses
global symbolic addresses
expressions

Destination types include:

procedural user symbols (except when the source is remote)
interprocedural user symbols (except when the source is remote)
logical addresses
local symbolic addresses
global symbolic addresses

You can use any source type listed above with any destination. If the
destination is a user symbol, the scanner checks to see if it has previously
been defined. If the user symbol was not previously defined, a new
symbol is generated.

Important: You cannot transfer data from another station and place it into
a user symbol defined at the local controller.

Assignment Command

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