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PROFIBUS S7-300/400 CPs -- Configuring and programming communication -- Using communication blocks

	How do you program the communication blocks FC50 and FC60?
	How do you program communication blocks FB12 "BSEND" and FB13 "BRCV" for data exchange in the S7 program of an S7-300 CPU?
	How do you program communication blocks FB14 "GET" and FB15 "PUT" for data exchange in the S7 program of an S7-300 CPU?
	Which blocks for Modbus TCP can you rename or re-wire when the block numbers of the Mode blocks are already being used in the user program?
	How do you program the function blocks FB14 "GET" and FB15 "PUT" in the S7 program of the S7-300 in order to transfer more than 160 bytes of data?
	Where can you find sample programs and documentation for using the PROFIBUS DP protocol for data communication between SIMATIC S5 modules and SIMATIC S7 modules?
	Where can you find sample programs and documentation for communication from SIMATIC S5 modules to SIMATIC S7 modules by way of PROFIBUS using the free Layer 2 of the FDL protocol?
	Where can you find sample programs and documentation for communication from SIMATIC S5 modules to SIMATIC S7 modules by way of PROFIBUS using the FDL protocol?
	Where can you find sample programs and documentation for using the PROFIBUS FMS protocol for data communication between SIMATIC S5 modules and SIMATIC S7 modules as well as for data communication between SIMATIC S5 modules and PCs?
	Notes on using an instance for multiple connection IDs
	Processing the data from DP slaves via CP342-5 on CPU31x
	Block calls for communications processors in multiple runtime layers
	Changing the input parameter of the user blocks "AG_SEND" and "AG_RECV" during the runtime of a job
	What should you watch out for if you transfer variables with the data type "REAL" when calling the communication blocks FC5/50 "AG_SEND/AG_LSEND" and FC6/60 "AG_RCV/AG_LRCV"?
	How do you program the communication blocks FC5 and FC6?
	What properties and special features does S7 Basis Communication offer?
	PROFIBUS: diagnostics of S7 connections with STEP 7
	Repeating the "BSEND" job (SFB12) when the "BRCV" block (SFB13) is in the "disabled" state ("EN_R = 0")
	How do you program communication blocks FB8 "USEND" and FB9 "URCV" for data exchange on the S7-300?
	Particularities when assigning parameters of the communication blocks of CP 342 / CP 343
	What should you watch out for when upgrading the CP 342-5 or fitting spare parts?
	Which version of the function blocks do you need to operate a CP 342-5?
	CP 342-5 -- How can you tell that the CP 342-5 has withdrawn from the PROFIBUS?
	CP 342-5 -- How do you program data communications when your DP slave only has outputs?
	CP 342-5 -- How can you read and write consistent data of a DP slave via the CP 342-5?

CP 342-5 -- How do you program data communications when your DP slave only has outputs?

Part number:

Instructions:
If the DP configuration of a CP 342-5 includes only one or multiple slaves that only have outputs, it is not necessary to call the FC 2 "DP_RECV".

Note
In some older versions of the CP 342-5 DA 02 (firmware V5.0) you must use FC 2 "DP_RECV" with a data length of 0 bytes or use "dummy" inputs. You must define the ANY pointer required by the DP_RECEIVE call with a data length of 0 bytes.

History:
FAQ 14557906 has been incorporated into the present FAQ and deleted as a separate FAQ.

Entry ID:21626358

Date:2005-06-20

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