Configuring/address space
4.6 Isochronous mode
Technology module TM FAST (6ES7554-1AA00-0AB0)
Equipment Manual, 04/2023, A5E52301130-AA
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4.6 Isochronous mode
The technology module supports the system function "Isochronous mode". In isochronous
mode, the cycle of the user program, the transmission of the input and output data and the
processing in the technology module are synchronized with each other.
Data processing
At the moment Ti, the data are fetched from the user logic registers. At the moment To, the
data of the user logic are available. In both cases, it is the responsibility of the TM FAST
application to perform timely processing with reference to the terminals of the TM FAST in
each case. The signals T_DC, T_I and T_O are available to the TM FAST application.
More information
You can find a detailed description of isochronous mode:
• In the Isochronous Mode Function Manual as a download from the Internet
(https://support.industry.siemens.com/cs/ww/en/view/109755401).
• In the PROFINET with STEP 7 function manual as a download from the Internet
(https://support.industry.siemens.com/cs/ww/en/view/49948856).
You can find information about the signals in the user logic in the programming manual
Creating a TM FAST Application
(https://support.industry.siemens.com/cs/ww/en/view/109816088).
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