Communications 8-9
Reference/Feedback The SMC-Flex does not offer the analog Reference feature. The
analog Feedback feature is supported and will provide Parameter 1,
Current in Phase A, automatically as the feedback word.
Parameter Information A complete listing of the SMC-Flex parameters is located in
Appendix B.
Scale Factors for PLC
Communication
The parameter values stored and produced by the SMC-Flex through
communication are unscaled numbers. When reading or writing
values from a PLC image table, it is important to apply the proper
scaling factor, which is based on the number of decimal places.
Read Example
Parameter 11; Power Factor — The stored value is 85. Since this
value has two decimal places, the value should be divided by 100.
The correctly read value is 0.85.
Write Example
Parameter 46; Motor FLC — The value which is to be written to
the SMC is 75 A. Since this value has one decimal place, the value
should be multiplied by 10. The correctly written value is 750.
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. Table 8.I has an example of
Parameter 44, Overload Class, and the appropriate relationship
between the text descriptor and the equivalent value. This relationship
is identical for other similar parameters located in Appendix B.
Configuring DataLinks DataLinks are supported in the SMC-Flex. A DataLink is a
mechanism used by most drives to transfer data to and from the
controller without using an Explicit Message. The SMC-Flex
supports 16-bit DataLinks, therefore the device can be configured to
return up to four additional pieces of information without the need for
an explicit message.
Table 8.I
Text Descriptor Numerical Equivalent
Disabled 0
Class 10 1
Class 15 2
Class 20 3
Class 30 4
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