Appendix a Diagnostics Processing in Profibus DP

		SPC3	PROFIBUS Interface Center
		SPC3	PROFIBUS Interface Center

11Appendix A: Diagnostics Processing in PROFIBUS DP

11.1 Introduction

PROFIBUS DP offers a convenient and multi-layer possibility for processing diagnostics messages on the basis of error states.

As soon as a diagnostics request is required, the slave will respond in the current data exchange with a high priority reply message. In the next bus cycle, the master then requests a diagnostics from this slave, instead of executing normal data exchange.

Likewise, any master (not only the assigned master!) can request a diagnostics from the slave. The diagnostics information of the DP slave consists of standard diagnostics information (6 bytes), and can be supplemented by user-specific diagnostics information.

In the case of the ASICs, SPM2, and LSPM2, extensive diagnostics is possible through corresponding wiring. In the case of the intelligent SPCx solution, adapted and convenient diagnostics processing can be carried out through programming.

11.2 Diagnostics Bits and Expanded Diagnostics

Parts of the standard diagnostics information are permanently specified in the firmware and in the micro- program of the ASICs through the state machine.

Request diagnostics only once („update_diag(..)“) fi an error is present or changes. By no means should diagnostics be requested cyclically in the data exchange state; otherwise, the system will be burdened by redundant data.

Three information bits can be influenced by the application:

11.2.1 STAT_DIAG

Because of a state in the application, the slave can’t make valid data available. Consequently, the master only requests diagnostics information until this bit is removed again. The PROFIBUS DP state is, however, Data_Exchange, so that immediately after the cancellation of the static diagnostics, data exchange can start.

Example: failure of supply voltage for the output drivers

11.2.2 EXT_DIAG

If this bit is set, a diagnostics entry must be present in the user-specific diagnostics area. If this bit is not set, a status message can be present in the user-specific diagnostics area.

User-Specific Diagnostics

The user-specific diagnostics can be filed in three different formats:

Device-Specific Diagnostics:

The diagnostics information can be coded as required.

	Bit 7	Bit 6	Bit 5-0
Header Byte	0	0	Block length in bytes, including header
Diagnostics Field	Coding of diagnostics is device-specific
.....	Can be specified as required

SPC3 Hardware Description	V1.3	Page 61
Copyright (C) Siemens AG 2003 All rights reserved.		2003/04

SPC3 specifications

Siemens SPC3 is a state-of-the-art solution designed to enhance industrial automation, providing businesses with a robust platform for managing complex processes efficiently. This device epitomizes Siemens' commitment to innovation, blending cutting-edge technology with user-friendly features to deliver optimized performance across various applications.

One of the standout features of the Siemens SPC3 is its advanced processing capabilities. Equipped with high-performance processors, it can handle various tasks simultaneously, ensuring seamless operation even in demanding environments. This performance is complemented by enhanced memory capacity, which allows for increased data handling and improved execution speed, crucial for real-time monitoring and control applications.

The Siemens SPC3 also integrates a modular design, enabling flexibility and scalability. This characteristic allows users to customize their systems according to specific operational needs, adding or removing components as required. This adaptability is particularly beneficial for businesses that aim to scale their operations without incurring the substantial costs associated with overhauling existing systems.

Furthermore, the SPC3 employs the latest communication technologies, ensuring interoperability with various devices and systems. It supports industry-standard protocols, facilitating efficient data exchange between components. This connectivity is vital for establishing smart factories and enhancing overall productivity by creating a unified ecosystem.

Another significant aspect of the Siemens SPC3 is its focus on security. As cyber threats in industrial settings become increasingly sophisticated, Siemens prioritizes safeguarding user data and system integrity. The SPC3 incorporates advanced security features, including encryption and access control measures, to protect against unauthorized access and ensure data confidentiality.

Siemens has also emphasized ease of use in the SPC3. The interface is designed to be intuitive, allowing operators to navigate and configure the system effortlessly. Coupled with comprehensive software tools, users are empowered to implement changes swiftly while minimizing downtime.

In terms of energy efficiency, the SPC3 incorporates technologies that allow for optimized energy consumption, aligning with sustainability goals prevalent in today’s industries. By reducing energy waste, businesses not only lower operational costs but also contribute to environmental conservation.

In summary, Siemens SPC3 represents a significant advancement in industrial automation technology. Its high-performance processing, modular adaptability, advanced communication capabilities, robust security measures, and user-friendly design make it an ideal choice for businesses striving for efficiency and innovation in their operations. The SPC3 is more than just a control device; it is a comprehensive solution that meets the evolving demands of modern industries.

Siemens SPC3 Appendix a Diagnostics Processing in Profibus DP, Introduction, Statdiag, Extdiag

Models: SPC3

SPC3