Siemens SIMATIC S7-1200

Communication
11.2 PROFINET
S7-1200 Programmable controller
836 System Manual, V4.2, 09/2016, A5E02486680-AK
11.2.8.7
TSEND_C and TRCV_C instructions
As of version V4.1 of the S7-1200 CPU together with STEP 7 V13 SP1, the CPU extends the
capability of the TSEND_C and TRCV_C instructions to use connection parameters with
structures according to "TCON_IP_v4" and "TCON_IP_RFC".
For this reason, the S7-1200 supports two sets of TSEND_C and TRCV_C instructions:
● Legacy TSEND_C and TRCV_C instructions (Page 848): These TSEND_C and TRCV_C
instructions existed prior to version V4.0 of the S7-1200 and only work with connection
parameters with structures according to "TCON_Param".
● TSEND_C and TRCV_C instructions (Page 837): These TSEND_C and TRCV_C
instructions provide all of the functionality of the legacy instructions, plus the ability to use
connection parameters with structures according to "TCON_IP_v4" and "TCON_IP_RFC".
Selecting the version of the TSEND_C and TRCV_C instructions
There are two versions of the TSEND_C and TRCV_C instructions available in STEP 7:
● Versions 2.5 and 3.1 were available in STEP 7 Basic/Professional V13 or earlier.
● Version 4.0 is available in STEP 7 Basic/Professional V13 SP1 or later.
For compatibility and ease of migration, you can choose which instruction version to insert
into your user program.
Do not use different instruction versions in the same CPU program.
Click the icon on the instruction tree task card to enable the headers and columns
of the instruction tree.
To change the version of the TSEND_C and
TRCV_C instructions, select the version from
the drop
-down list. You can select the group
or individual instructions.
When you use the instruction tree to place a TSEND_C or TRCV_C instruction in your
program, a new FB or FC instance, depending on the TSEND_C or TRCV_C instruction
selected, is created in the project tree. You can see new FB or FC instance in the project
tree under PLC_x > Program blocks > System blocks > Program resources.
To verify the version of a TSEND_C or TRCV_C instruction in a program, you must inspect
project tree properties and not the properties of a box displayed in the program editor. Select
a project tree TSEND_C or TRCV_C FB or FC instance, right-click, select "Properties", and
select the "Information" page to see the TSEND_C or TRCV_C instruction version number.