Siemens S7-1200 - T_Config

Communication
10.2 PROFINET
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
541
10.2.2.9
T_CONFIG
The T_CONFIG instruction changes the IP configuration parameters of the PROFINET port
from the user program, allowing the permanent change or setting of the following features:
● Station name
● IP address
● Subnet mask
● Router address
Note
Located in the CPU "Properties", "Ethernet address" page, the
"Set IP address using a
different method"
(Page 546) radio button allows you to change the IP address online or
by using the "T_CONFIG" instruction after the program is downloaded. This IP address
assignment method is for the CPU only.
Located in the CPU "Properties", "Ethernet addre
ss" page, the "Set PROFINET device
name using a different method"
(Page 547) radio button allows you to change the
PROFINET device name online or by using the "T_CONFIG" instruction after the program
is downloaded. This PROFINET device name assignment method is for the CPU only.
WARNING
Changing IP configuration parameter with T_CONFIG causes a CPU restart.
After you use the T_CONFIG to change an IP configuration parameter, the CPU
restarts. The CPU goes to STOP mode, performs a warm restart, and returns to RUN
mode.
Do not use the T_CONFIG instruction in a production environment. Control devices can
fail in an unsafe condition, resulting in unexpected operation of controlled equipment.
Such unexpected operations could result in death or serious injury to personnel, and/or
damage to equipment.
Ensure that your process will go to a safe state when the CPU performs a warm restart
as a result of T_CONFIG instruction execution. A warm restart does not reset memory.
A warm restart does initialize all non-retentive system and user data and retains the
values of all retentive user data.
Note
You should not attempt to execute more than one T_CONFIG instruction at a time.