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S7-300 CPU 31x -- Configuring and programming communication -- Configuring the PROFIBUS interface
How do you activate the "Prioritized OCM communication" function to improve the OP communication performance?
How do you configure a connection between WinCC flexible Runtime (PC/Panel) and a SIMATIC S7-300/S7400 via PROFIBUS/MPI?
Where can you find sample S7 programs and documentation for communication via PROFIBUS in the SIMATIC NET Quick Start Collection?
What differences are there when configuring S7 connections?
Transfer of analog values from and to the PROFIBUS DP slave
What should you pay attention to when operating a DP slave temporarily on a PROFIBUS DP network?
How do you configure an S7 connection via MPI with the SIMATIC NET OPC server and the SIMATIC NET PC software?
How do you configure a PC station as DP slave for connecting an S7 station (as DP master) for the SIMATIC NET OPC server with the SIMATIC NET PC software?
What are the differences between the integrated DP interface of a CPU (e.g. CPU 315-2 DP) and the DP interface of the CP 342-5?
How do you read data consistently from a DP standard slave/PROFINET IO device and write it consistently to a DP standard slave/PROFINET IO device?
What are the options for exchanging data between CPUs via MPI/PROFIBUS DP?
Direct data exchange (internode communication) between two CPU modules
S7 routing via PROFIBUS with S7-300
Rules for accessing the CPU 315-2 DP on distributed I/O (integrated DP interface of CPU 315-2 DP)
Startup of the S7-300 CPUs when slave is not available
Routing with compact CPU and C7-635 as DP slave
How can you tell whether your S7-300/400 master supports DPV1 functions?
Routing with compact CPU and C7-635 as DP slave
Part number:

QUESTION:
Why can't I route via the DP interface with a compact CPU and with the C7-635 when the DP interface has been configured as a slave?

ANSWER:
In STEP 7 V 5.2 there is no provision for routing with the compact CPUs (V1.x) via the interface when this has been configured as a slave. If the compact CPU is configured as a DP master however, routing is possible.

Compact CPUs V2.0 and higher can route as DP slaves (table 1). For this you need STEP 7 V 5.2 SP1. In addition, in the hardware configuration you must set a check mark for "Commissioning/Test Mode" in the Properties dialog of the DP interface. This makes the CPUs also become active nodes (I slaves) on the bus.

Designation

Order No.

CPU 313C 2DP

6ES7313-6CE01-0AB0

CPU 314C 2DP

6ES7314-6CF01-0AB0

C7-635 Key

6ES7635-2EC01-0AE3

C7-635 Touch

6ES7635-2EB01-0AE3

C7-636 Key

6ES7636-2CE00-0AE3

Table 1: Routing-compliant compact CPUs/C7 complete systems (from FW V2.0)

Note:
In order to use this function, STEP 7 V5.3 is required for the C7-635 / C7-636 complete systems.


 Entry ID:14293776   Date:2004-02-03 
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