Configuration and operation
4.6 Configuration in STEP 7 V5
CP 1243-8 IRC
48
Operating Instructions, 06/2015, C79000-G8976-C385-01
Configuration in STEP 7 Basic
In STEP 7 Basic, two methods of time-of-day synchronization can be configured for the CP:
●
Time-of-day synchronization from the STEP 7 V5 project
If the “telecontrol communication“ (parameter group “Communication types“ is enabled in
STEP 7 Basic, the settings for the time-of-day synchronization are adopted as they were
configured for the proxy in the STEP 7 project when the configuration data is imported.
●
NTP / NTP (secure)
If "telecontrol communicationis disabled, it is only possible to synchronize using NTP
mechanisms in STEP 7 Basic
The method NTP (secure) can only be selected if the security functions are enabled.
Configuration:
–
Security functions not enabled:
The time-of-day synchronization is configured in the "Ethernet interface > Time
synchronization" parameter group. Only NTP is available as the synchronization
method.
–
Security functions enabled:
The time-of-day synchronization is configured in the "Security" parameter group. NTP
and NTP (secure) are available as the synchronization methods.
The secure method NTP (secure) uses authentication with symmetrical keys according to
the hash algorithms MD5 or SHA-1.
You can create and manage additional NTP servers also of the type NTP (secure) in the
global Security settings of the STEP 7 project.
You will find further notes on configuration in the STEP 7 information system.
Time-of-day synchronization of the CPU
In STEP 7 Basic, in the parameter group "Communication with the CPU", you can set
whether or not the current time of day of the CP will be made available to the CPU via a PLC
tag.
4.6
Configuration in STEP 7 V5
4.6.1
Overview of the configuration
Basic procedure for configuration
When configuring in STEP 7 V5, follow the steps described in the system manual SINAUT
ST7 volume 2 "Software". For the manual see /3/ (Page 136).
You will find special features of the configuration of the CP or its proxy in the following
sections.