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When you are using a PLC-5C controller or a ControlNet scanner to consume
tags, keep the following in mind about the Input Size field:
• If the scanner is consuming a DINT, in the Input Size field, enter two
times the number of DINTs you need to read from the produced tag.
For example, if the produced tag contains 10 DINTs, enter 20 for the
Input size; the input size must be an even number.
• If the scanner is consuming REALs, in the Input Size field, enter two
times the number of REALs you need to read from the produced tag.
For example, if the produced tag contains 10 REALs, enter 20 for the
Input size; the input size must be an even number.
7. Save the file. This will schedule the network.
Reconstruct Values with PLC-5C Controller
When your Logix5000 controller produces REALs (32-bit floating-point
values) to a PLC-5C controller, the PLC-5C consumes the data in consecutive
16-bit integers:
• The first integer contains the upper (left-most) bits of the value.
• The second integer contains the lower (right-most) bits of the value.
• This pattern continues for each floating-point value.
Produce and Consume Tags (Interlock Controllers)
Publication CNET-UM001C-EN-P - November 2005
5-17
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