Siemens SIMATIC S7-1200 - Page 858

Communication
11.2 PROFINET
S7-1200 Programmable controller
858 System Manual, V4.2, 09/2016, A5E02486680-AK
TCON and TDISCON
Note
Initializing the communication parameters
After you insert the TCON instruction, use the "Properties"
of the instruction (Page 807) to
configure the
communication parameters (Page 832). As you enter the parameters for the
communication partners in the inspector window, STEP
7 enters the corresponding data in
the instanc
e DB for the instruction.
If you want to use a multi
-instance DB, you must manually configure the DB on both CPUs.
Table 11- 20 TCON and TDISCON instructions
LAD / FBD
Description
"TCON_DB"(
req:=_bool_in_,
ID:=_undef_in_,
done=>_bool_out_,
busy=>_bool_out_,
error=>_bool_out_,
status=>_word_out_,
connect:=_struct_inout_);
TCP and ISO on TCP: TCON initiates a commu-
nications connection from the CPU to a commu-
nication partner.
"TDISCON_DB"(
req:=_bool_in_,
ID:=_word_in_,
done=>_bool_out_,
busy=>_bool_out_,
error=>_bool_out_,
status=>_word_out_);
TCP and ISO on TCP: TDISCON terminates a
communications connection from the CPU to a
communication partner.
1
STEP 7 automatically creates the DB when you insert the instruction.