Properties and functions
1.4 Requirements for use
CM 1542-1
18
Operating Instructions, 07/2019, C79000-G8976-C355-04
1.4.2
Programming
Program blocks
For communications services, there are preprogrammed program blocks (instructions)
available as the interface in your STEP 7 user program.
Table 1- 1
Instructions for communications services
Protocol
Program block (instruction)
System data type
TCP
Establish connection and
send/receive data via:
•
TSEND_C / TRCV_C
or
•
TCON, TSEND / TRCV
(Termination of the connec-
tion possible using
TDISCON)
•
TCON_IP_v4
•
TCON_Configured
•
TCON_QDN
ISO-on-TCP
•
TCON_IP_RFC
UDP
•
TCON, TUSEND/TURCV
(Termination of the connec-
tion possible using
TDISCON)
•
TCON_IP_v4
•
TCON_QDN
•
TMAIL_C
•
TMail_V4
•
TMAIL_FQDN
Table 1- 2
Instructions for configuration tasks
Function
Program block (instruction)
System data type
Configuration of the Ethernet
interface
•
T_CONFIG
•
CONF_DATA
For more detailed information, refer to section Program blocks for OUC (Page 34).
Refer to the documentation of the program blocks in the online help of STEP 7.