Configuration, programming
4.9 Program blocks for OUC
CP 1543-1
68 Operating Instructions, 12/2019, C79000-G8976-C289-08
4.8.4.2 Online security diagnostics via port 8448
Security diagnostics via port 8448
Requirement: Access to the Web server of the CP is activated via HTTPS.
If you want to perform security diagnostics in STEP 7 Professional, follow the steps below:
1. Select the CP in STEP 7.
2. Open the "Online & Diagnostics" shortcut menu.
3. In the "Security" parameter group, click the "Connect online" button.
In this way, you perform the security diagnostics via port 8448.
4.8.5 Log settings - Filtering of the system events
Communications problems if the value for system events is set too high
If the value for filtering the system events is set too high, you may not be able to achieve the
maximum performance for the communication. The high number of output error messages
can delay or prevent the processing of the communications connections.
In "Security > Log settings > Configure system events", set the "Level:" parameter to the
value "3 (Error)" to ensure the reliable establishment of the communications connections.
4.9 Program blocks for OUC
Programming Open User Communication (OUC)
The instructions (program blocks) listed below are required for the following communication
services via Ethernet:
● ISO transport
● TCP (IPv4 / IPv6)
● ISO-on-TCP
● UDP (Multicast)
● E-mail
For this, create suitable program blocks. The program block can be found in STEP 7 in the
"Instructions > Communication > Open user communication" window.
You will find details on the program blocks in the information system of STEP 7.
Note
Different program block versions
Note that in STEP 7 you cannot use different versions of a program block in a station.
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