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S7-400 CPU 41x -- Configuring and programming communication -- Configuring the PROFIBUS interface
How do you configure a connection between WinCC flexible Runtime (PC/Panel) and a SIMATIC S7-300/S7400 via PROFIBUS/MPI?
What do you have to consider when connecting a S7-400 CPU to an external master as DP slave?
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?
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?
How can you tell whether your S7-300/400 master supports DPV1 functions?
Where are the settings of the MPI and PROFIBUS interfaces retained after updating the operating system for a CPU 41x?
PROFIBUS general -- Configuring and programming communication -- Using communication blocks
Transfer of analog values from and to the PROFIBUS DP slave
Which entries deal with consistent data in conjunction with distributed I/O?
How can you access consistent data without SFC14/15 as part of the process image?
Why does my new CPU 315-2DP (Order No: 6ES7 315-2AG10-0AB0) not process the SFC13 correctly?
How do you receive an alarm with the SFB 54 "RALRM" in compliance with DPV1?
DP slave lifelist using SFC51 "RDSYSST" instead of SFC12 "D_ACT_DP"
Can you use the "Signal System Error" function, the FB126 function block and the SFC13 "DPNRM_DG" system function simultaneously?
Notes for the use of the system function SFC12 "D_ACT_DP"
What is consistent data?
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?
Disabling DP slaves after startup of the CPU
Diagnostics information of the FB125 with disabled DP slave
Enabling a disabled DP slave with SFC 12 "D_ACT_DP"
Parameter assignment of SFC 103 / SFC 59 required for identifying and reading out topology data
What are the requirements for using the "Prepare cable diagnostics" function?
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?
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?
Transfer of analog values from and to the PROFIBUS DP slave
Part number:

QUESTION:
The analog values are transferred only in part or not at all. How can I clear this problem?

ANSWER:
If none or only part of the analog values are transferred, or the transferred values are incorrect, then this might have something to do with the length of the consistent data of the slave (affects S7-300/400 CPUs).
If more than 4 bytes (or exactly 3 bytes) are consistent over the entire length, then you must access the analog values of the slave with the SFCs 14 "DPRD_DAT" and 15 "DPWR_DAT". A description of the SFCs is given in the manual "System Software for S7-300/400 System and Standard Functions". The information on consistent data lengths of the PROFIBUS DP slave are given in the HW Config.
Procedure:

  1. In the HW Config you mark the PROFIBUS slave.

  1. Double-click the module from which you want to know which consistent areas it has. In the "Address/ID" tab of the "Properties - DP slave" window you can see the length over which the data is consistent.

 Entry ID:2121979   Date:2000-04-20 
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