Specify PLC-5 Messages

Use the
PLC-5
message types to communicate with
PLC-5
controllers.
Select this command:
To:
PLC-5
Typed Read
Read 16-bit integer, floating-point, or string type data and maintain data integrity.
PLC-5
Typed Write
Write 16-bit integer, floating-point, or string type data and maintain data integrity.
PLC-5
Word Range Read
Read a contiguous range of 16-bit words in
PLC-5
memory regardless of data type.
This command starts at the address specified as the Source Element and reads sequentially the number of 16-bit words requested.
The data from the Source Element is stored, starting at the address specified as the Destination Tag.
PLC-5
Word Range Write
Write a contiguous range of 16-bit words from
Logix 5000
memory regardless of data type to
PLC-5
memory.
This command starts at the address specified as the Source Tag and reads sequentially the number of 16-bit words requested.
The data from the Source Tag is stored, starting at the address specified as the Destination Element in the
PLC-5
processor.
Data types for
PLC-5
Typed Read and Typed Write messages
The following table shows the data types to use with
PLC-5
Typed Read and
PLC-5
Typed Write messages.
For this
PLC-5
data type:
Use this
Logix 5000
data type:
B
INT
F
REAL
N
INT
DINT (Only write DINT values to a
PLC-5
controller if the value is ≥ −
32,768 and ≤ 32,767.)
S
INT
ST
STRING
The Typed Read and Typed Write commands also work with SLC 5/03 processors (OS303 and above), SLC 5/04 processors (OS402 and above), and SLC 5/05 processors.
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