Specify Plc-2 Messages; Msg Configuration Examples - Allen-Bradley Logix5000 Reference Manual

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PLC2 Unprotected Read
PLC2 Unprotected Write
MSG Configuration
Examples
Message Path
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Logix5000
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Logix5000
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Logix5000
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Logix5000
Message Path
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Logix5000
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Logix5000
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Logix5000
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Logix5000

Specify PLC-2 Messages

The PLC-2 message types are designed for PLC-2 processors.
If you want to
Read 16-bit words from any area of the PLC-2 data table or the PLC-2 compatibility file of another
processor.
Write 16-bit words to any area of the PLC-2 data table or the PLC-2 compatibility file of another
processor.
The message transfer uses 16-bit words, so make sure the Logix5000 tag
appropriately stores the transferred data (typically as an INTarray).
The following examples show source and destination tags and elements for
different controller combinations.
The table explains the path for MSG instructions originating from a Logix5000
controller and being writing to another controller.
Example Source and Destination
Logix5000 Source tag
Destination tag
You can use an alias tag for the source tag (in originating Logix5000 controller).
You cannot use an alias for the destination tag. The destination must be a base tag.
PLC-5 Source tag
SLC
Destination element
You can use an alias tag for the source tag (in originating Logix5000 controller).
PLC-2 Source tag
Destination element
The table explains the path for MSG instructions originating from a
Logix5000 controller and reading from another controller.
Example Source and Destination
Logix5000 Source tag
Destination tag
You cannot use an alias tag for the source tag. The source must be a base tag.
You can use an alias tag for the destination tag (in originating Logix5000 controller).
PLC-5 Source element
SLC
Destination tag
You can use an alias tag for the destination tag (in originating Logix5000 controller).
PLC-2 Source element
Destination tag
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Input/Output Instructions (MSG, GSV, SSV, IOT)
array_1[0]
array_2[0]
array_1[0]
N7:10
array_1[0]
010
array_1[0]
array_2[0]
N7:10
array_1[0]
010
array_1[0]
Chapter 4
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