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S7-300 CPU 31x -- Product information -- Determining performance and quantity frameworks
How many connections and communication jobs do SIMATIC S7-300 and S7-400 support simultaneously?
Which connection resources are occupied in the S7-300 CPU for communication connections and services of the Industrial Ethernet CP?
What are the system limits in an F CPU for safe bidirectional data communication using S7 Communication?
How can you determine the size of the load memory and main memory of a SIMATIC S7-300/400 CPU?
What restrictions are there for active jobs when communicating with SFC 58 / SFC 59 and SFB 52 / SFB 53 via PROFIBUS DP and PROFINET IO?
Where do you find information on transmission times on the PROFIBUS or Industrial Ethernet?
What is a hardware interrupt and how do they work in the S7-300 system?
What is the maximum number of OPs that a CPU S7-300 can communicate with?
What can you do when the power requirement of the modules in the subrack exceeds the power supply provided by the CPU on the backplane bus?
Does PROFIBUS DP communication use connection resources?
What is the maximum number of CP modules that can be slotted in a SIMATIC S7-300/400 station?
Why, in the case of a networked SIMATIC S7, does the connection to the OP clear down when you call diagnostics functions with the PG or transfer blocks?
How many breakpoints can you insert when debugging a program?
Does PROFIBUS DP communication use connection resources?
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Configuration Notes:
PROFIBUS DP communication in a master-slave system does not use connection resources as long as data is exchanged exclusively via load and transfer commands. The number of your DP slaves therefore does not detract from your connection resources pool. Nor do you have to take the DP communication into account in the "Communication" tab (available in many SIMATIC S7-300 CPUs) of the CPU Properties dialog in HW Config when reserving resources.

In all other cases such as S7 Basic communication, S7 communication, S5-compatible communication etc., where data exchange is via communication blocks, you must have connection resources available.


 Entry ID:21910238   Date:2005-08-23 
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