Siemens SIMATIC ET 200AL, System Manual

Page: 1854 / 2255

Functions
5.13 Accelerating startup
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
289
Optimizing port settings for accelerated startup
To optimize port settings for accelerated startup, follow these steps:
1.
Select the ports of the IO controller or the partner port of the corresponding IO device.
2. Navigate to "Port options > Connection" in the Inspector window. Select the setting "TP 100
Mbps full duplex" under "Transmission rate/duplex"
3. Clear the "Enable autonegotiation" check box.
Figure 5-114 Optimizing port settings for accelerated startup in STEP 7
These settings are automatically applied during topology configuration for the partner port.
5.13.5 Optimize the cabling of the ports
Requirements
You have made the following settings for the port in question to reduce the startup time of
the IO device:
•
Fixed transmission rate
• Autonegotiation deactivated
The time for negotiating the transmission rate during startup is saved.
If you have disabled autonegotiation, you must observe the cabling rules.