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S7-400 CPU 41x -- Product information -- Background and system information

	What are the differences between OPEN MODBUS / TCP Redundant V1 and OPEN MODBUS / TCP Redundant V2?
	What is the difference between "normal routing" and data record routing?
	Which SIMATIC S7-300/S7-400 modules support the NTP time-of-day message and how do you activate this kind of time synchronization?
	Which manufacturer ID, in other words OUI (Organizationally Unique Identifier), does SIEMENS AG use for the MAC addresses of network-compatible devices?
	What should you watch out for when adding components or changing their parameters using CiR (Configuration in Run)?
	Which IO controllers and IO devices support the following functions: IRT, prioritized startup, MRP, PROFIenergy, Shared device, I device and clock-synchronized mode?
	Which types of connection/protocols do the S7-300/400 CPUs and the CPs support by default?
	Which PROFINET nodes support automatic commissioning and the replace device without interchangeable medium function?
	Behavior of the CPU after power off without back-up battery
	I/O addressing with DP slaves
	Which PROFINET nodes support the extended PN diagnostics and what do you have to configure?
	What is the difference between a restart (warm restart), cold restart and hot restart of a S7-400 CPU?
	Which SIMATIC S7 modules support the "Direct Data Exchange" function (internode communication)?
	What properties, advantages and special features does the S7 Basis Communication offer?
	What properties, advantages and special features does the global data communication offer?
	Which entries deal with consistent data in conjunction with distributed I/O?
	What is the connection between subnet masks and IP addresses with regard to subnetting and supernetting (Classless Inter Domain Routing CIDR)?
	What are the requirements for using the S7 routing function and which modules can you implement?
	CPU does not work in RUN
	What does "Correction factor" mean in the "Diagnostics/Clock" tab of the CPU's Properties dialog?
	What is multicomputing mode and what are the differences to operating in the segmented subrack?
	Differing information on the requirement of offline/ online memory
	How can I get an overview of the S7-400 memory concept?

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 -- Product information -- Background and system information

	What are the differences between OPEN MODBUS / TCP Redundant V1 and OPEN MODBUS / TCP Redundant V2?
	What is the difference between "normal routing" and data record routing?
	Which SIMATIC S7-300/S7-400 modules support the NTP time-of-day message and how do you activate this kind of time synchronization?
	Which manufacturer ID, in other words OUI (Organizationally Unique Identifier), does SIEMENS AG use for the MAC addresses of network-compatible devices?
	What should you watch out for when using the alarm numbering procedure?
	Which IO controllers and IO devices support the following functions: IRT, prioritized startup, MRP, PROFIenergy, Shared device, I device and clock-synchronized mode?
	What is the maximum number of parameters that can be assigned to an FC and FB in the S7-300 CPU?
	Which types of connection/protocols do the S7-300/400 CPUs and the CPs support by default?
	Which PROFINET nodes support automatic commissioning and the replace device without interchangeable medium function?
	Which PROFINET nodes support the extended PN diagnostics and what do you have to configure?
	Why is only a warm start available for S7-300?
	Which SIMATIC S7 modules support the "Direct Data Exchange" function (internode communication)?
	Which entries deal with consistent data in conjunction with distributed I/O?
	What properties, advantages and special features does the S7 Basis Communication offer?
	What properties, advantages and special features does the global data communication offer?
	What is the connection between subnet masks and IP addresses with regard to subnetting and supernetting (Classless Inter Domain Routing CIDR)?
	What are the requirements for using the S7 routing function and which modules can you implement?
	How can you obtain an overview of the memory concept of SIMATIC S7-300 CPUs and C7 devices?
	Retentivity behavior of S7-300 CPU 31x and complete devices C7-6xx with MMC
	Status of the run-time meter after overall reset
	Why does the retentivity behavior of the S7-300 CPUs and C7 devices without MMC (Micro Memory Card) influence the contents of the variables?
	Local data addressing with S7-300 / S7 400
	S7 300 run-time meter doesn't give any value

PROFINET general -- Configuring and programming communication -- Using communication blocks

	In the user program of an S7-300 or S7-400 CPU with integrated PN interface, how can you read out the current topology of the PROFINET IO system connected?
	Which entries deal with consistent data in conjunction with distributed I/O?

Which entries deal with consistent data in conjunction with distributed I/O?

Part number:

Consistent data, overview and application in distributed I/O.
In the following is a description of how to deal with consistent data in STEP 7.

28991143_Consistent_Data_e.pdf ( 766 KB )

The entries dealing with the topic of consistent data are listed below.

Topic

Entry ID

Definition of terms.
5116353

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?
21848242

Consistent data in S7-400 11646774

How can you access consistent data without SFC14/15 as part of the process image? 8751062

How is consistent data of the distributed I/O processed in S7 masters? 245111

Rules for the CPU 315-2 DP accessing the distributed I/O 42413

CP 342-5 -- How can you read and write consistent data of a DP slave via the CP 342-5? 21627748

What should you watch out for when configuring consistent data in COM PROFIBUS with IM 308-C as DP slave? 22566679

What are the options for address assignment of consistent data in IM 308-C? 21459883

Keywords:
SFC 14, SFC 15, Consistency

Entry ID:28991143

Date:2009-09-22

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