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Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Analog Modules
Structure of the chapter
The present chapter is broken down into the following subjects:
1. Chapter overview of which modules are available and described here
2. Module overview of the most important properties of the modules
3. Sequence of Steps from Choosing to Commissioning the Analog Module
4. Information that is generally available – in other words, affects all analog
modules (such as parameter assignment and diagnostics)
5. Information that refers to specific modules (for example, characteristics,
diagram of connections and block diagram, technical specifications and special
characteristics of the module):
a) for analog input modules
b) for analog output modules
c) for analog input/output modules
STEP 7 blocks for analog functions
You can use the blocks FC 105 “SCALE” (Scale Values) and FC 106 “UNSCALE”
(Unscale Values) for reading and outputting analog values in STEP 7. You will find
the FCs in the standard library of STEP 7 in the subdirectory called
“TI-S7-Converting Blocks” (for a description, refer to the STEP 7 Online Help for
the FCs).
Additional information
Appendix A describes the structure of the parameter sets (data records 0, 1 and
128) in the system data. You must be familiar with this configuration if you want to
modify the parameters of the modules in the STEP 7 user program.
Appendix B describes the structure of the diagnostic data (data records 0 and 1) in
the system data. You must be familiar with this configuration if you want to
evaluate the diagnostic data of the modules in the STEP 7 user program.
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