SPC3

PROFIBUS Interface Center

 

 

 

 

 

 

6.2 Description of the DP Services

6.2.1 Set_Slave_Address (SAP55)

6.2.1.1 Sequence for the Set_Slave_Address Utility

The user can disable this utility by setting the ‘R_SSA_Puf_Ptr = 00H’ buffer pointer. The slave address must then be determined, for example, by reading a switch, and written in the R_TS_Adr. RAM register.

The user must make a retentive memory possibility available (for example, EEPROM) to support this utility. It must be possible to store the ‘station address’and the ‘Real_No_Add_Change’ (‘True’ = FFH) paramet r in this external EEPROM. After each restart caused by a power failure, the user must again make these values available to SPC3 in the R_TS_Adr und R_Real_No_Add_Change RAM register.

If SAP55 is enabled and the Set_Slave_Address telegram is correctly accepted, SPC3 enters all net data in the Aux-Puffer1/2, exchanges the Aux buffer1/2 for the SSA buffer, stores the entered data length in ‘R_Len_SSA_Data’, generates the ‘New_SSA_Data’ interrupt and internally stores the new ‘station address’ and the new ‘Real_No_Add_Change’ parameter. The user does not need to transfer this changed

parameter to SPC3 again. After the user has read the buffer, the user generates the ‘SSA_Puffer_Free_Cmd’ (read operation on address 14H). This makes SPC3 again ready to receive an additional Set Slave Address telegram (such as from another master).

SPC3 reacts independently when there are errors.

Address

 

 

 

Bit Position

 

 

 

Designation

Control

7

6

5

4

3

2

1

0

 

Register

 

 

 

 

 

 

 

 

 

14H

0

0

0

0

0

0

0

0

SSA_Puffer_Free_Cmd

 

 

 

 

don´t care

 

 

 

 

Figure 6.3: Coding SSA_Buffer_Free_Cmd

 

 

 

6.2.1.2 Structure of the Set_Slave_Address Telegram The net data are stored as follows in the SSA buffer:

Byte

 

 

 

Bit Position

 

 

 

Designation

 

7

6

5

4

3

2

1

0

 

0

 

 

 

 

 

 

 

 

New_Slave_Address

1

 

 

 

 

 

 

 

 

Ident_Number_High

2

 

 

 

 

 

 

 

 

Ident_Number_Low

3

 

 

 

 

 

 

 

 

No_Add_Chg

4-243

 

 

 

 

 

 

 

 

Rem_Slave_Data additional application-

 

 

 

 

 

 

 

 

 

specific data

Figure 6.4: Data Format for the Set_Slave_Address Telegram

SPC3 Hardware Description

V1.3

Page 29

Copyright (C) Siemens AG 2003 All rights reserved.

 

2003/04

Page 31
Image 31
Siemens SPC3 manual Description of the DP Services, SetSlaveAddress SAP55, Sequence for the SetSlaveAddress Utility

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.