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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