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SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Data Exchange with the SM 335
Preliminary remark
Data exchange with the SM 335 is defined here as follows:
•
Transfer of data to the SM 335 from the CPU and
•
Reading of data from the SM 335 by the CPU.
Overview
In this chapter, we have summarized all the data that can be transferred to the
SM 335 or supplied by the SM 335.
Methods
There are basically several methods of reading or writing data:
•
Access via the I/O addresses (e. g., with L PIW, T PQW)
•
Setting parameters via HW Config
•
Writing parameters with the help of system function 55
•
Reading diagnostics data via system function 59
•
Other methods: see Reference Manual
System Software for S7-300/400 System and Standard Functions.
Measuring range module
Before you plug in the SM 335, you must insert the measuring range module into
the SM 335. The SIMATIC Programmable Logic Controller, S7-300 Module Data
Reference Manual describes how to insert the measuring range module into the
SM 335.
The measuring method (current/voltage measurement) is set for the analog inputs
depending on the position in which you plug in the measuring range module.
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