Siemens SIMATIC ET 200AL, System Manual

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High-precision input/output with Time-based IO
Function Manual, 11/2019, A5E33454822-AC
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Preface
Purpose of the documentation
This function manual will support you when you use "Time-based IO" technology with the
S7-1500, ET 200MP, and ET 200SP systems.
The documentation deals with the following topics:
● Using "Time-based IO" technology
● Functions of the "Time-based IO" technology
● Hardware and software requirements for "Time-based IO"
● Configuring the "Time-based IO" function with STEP 7 (TIA Portal)
Basic knowledge required
The following knowledge is required in order to understand the Function manual:
● General knowledge of automation technology
● Knowledge of the industrial automation system SIMATIC
● Proficiency with STEP 7 (TIA Portal)
● Knowledge about isochronous mode
Scope of the documentation
The following documentation is valid for all components of the S7-1500, ET 200MP and
ET 200SP systems that support the "Time-based IO" technology.
Conventions
The following terms are used as synonyms in this documentation:
● TIO module: This term is used as synonym for I/O modules of the type:
–
ET 200MP TM Timer DIDQ 16x24V
– ET 200SP TM Timer DIDQ 10x24V
● TIO_Time: This term is used as synonym for the shared time base (relative time) of the
TIO modules.
● Jitter: This is a general term that includes various time influences affecting accuracy. This
means that:
–
for input data: Deviation of the measured time from the actual event.
– for output data: Deviation of the actual switching time from the specified time.