142 Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
Chapter 7 Communications
Display Text Unit
Equivalents
Some parameters have text descriptions when viewed from a HIM or through a
communication software program such as RSNetworx. When receiving or
sending information from a PLC each text description has a numerical
equivalent. The table below shows an example of Meter Reset, Parameter 16, and
the appropriate relationship between the text descriptor and the equivalent value.
This relationship is identical for other similar parameters located in Appendix B.
Table 52 - Meter Reset Parameter Example
Configuring DataLink™
DataLink is supported in the SMC-50 control module. DataLink is a mechanism
that most drives use to transfer data to and from the controller without using an
explicit message. The SMC-50 control module supports a 32-bit DataLink,
allowing you to configure the device to return up to eight additional pieces of
information without the need for an explicit message.
Criteria for Using DataLink
• Each set of DataLink parameters in an SMC-50 can be used by only one
adapter. If more than one adapter is connected, multiple adapters must not
try to use the same DataLink.
• Parameter settings (contents) in the SMC-50 control module determine
the data passed through the DataLink mechanism.
• When DataLink is used to change a value in the SMC-50 control module,
the value is not written to the Non-Volatile Storage (NVS). However, if the
controller is powered down, the current value is written to NVS.
To configure DataLink, you must use Parameters 153…168 of the SMC-50
control module. See Table 53
for a detailed listing of these parameters. For
additional information about DataLink, see the communication interface’s user
manual.
Text Description Numerical Equivalent
Ready 0
Elapsed Time 1
Energy 2
Time to PM 3
Starts to PM 4
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