Open User Communication
6.5 Setting up Open User Communication via TCP, ISO-on-TCP, UDP and ISO
Communication
Function Manual, 12/2017, A5E03735815-AF
81
Point to note with ISO connections with CP 1543-1
If you use the "ISO connection" connection type, you will need to select the "Use ISO
protocol" check box in the properties of the CP so that addressing using MAC addresses will
work.
Figure 6-5 Select CP 1543-1 ISO protocol
The STEP 7 online help describes:
● The instructions for open communication
● The connection parameters
This FAQ (https://support.industry.siemens.com/cs/ww/en/view/109479564
) describes how
the instructions TSEND_C and TRCV_C behave in the S7-1500.
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