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PDF SPC3 Data sheet ( Hoja de datos )
| Número de pieza | SPC3 | |
| Descripción | PROFIBUS Controller | |
| Fabricantes | Siemens | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SPC3 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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SIMATIC NET
SPC3 Siemens PROFIBUS Controller
User Description
Date 09/25/02
1 page  
Versions
Release
V 1.7
V 1.8
V1.9
Date
12/23/99
02/09/00
08/09/00
V 2.0
09/25/02
SPC3
PROFIBUS Interface Center
Changes
Chapter 8.2 Current consumption without bus accesses
Chapter 15.1 Contact persons
Chapter 8.6.9 Humidity class
Chapter 6.2.2.1 Publisher_Enable bit
Chapter 6.2.10 DXB
Chapter 15.1 Addresses
Included the specification of the different manufacturers in
Chap. 8.1, 8.3, 8.5 and 10.3 Order numbers
chap 10.1 contact persons
SPC3 User Description
Copyright (C) Siemens AG 2002. All rights reserved.
V2.0
Page 3
09/02
5 Page 
SPC3
PROFIBUS Interface Center
2 Function Overview
The SPC3 makes it possible to have a price-optimized configuration of intelligent PROFIBUS-DP slave
applications.
The processor interface supports the following processors:
Intel:
Siemens:
Motorola:
80C31, 80X86
80C166/165/167
HC11-,HC16-,HC916 types
In SPC3, the transfer technology is integrated (Layer 1), except for analog functions (RS485 drivers), the FDL
transfer protocol (Fieldbus Data Link) for slave nodes (Layer 2a), a support of the interface utilities (Layer 2b),
some Layer 2 FMA utilities, and the complete DP slave protocol (USIF: User Interface, which makes it
possible for the user to have access to Layer 2). The remaining functions of Layer 2 (software utilities and
management) must be handled via software.
The integrated 1.5k Dual-Port-RAM serves as an interface between the SPC3 and the software/application.
The entire memory is subdivided into 192 segments, with 8 bytes each. Addressing from the user takes
place directly and from the internal microsequencer (MS) by means of the so-alled base pointer. The base-
pointer can be positioned at any segment in the memory. Therefore, all buffers must always be located at the
beginning of a segment.
If the SPC3 carries out a DP communication the SPC3 automatically sets up all DP-SAPs. The various
telegram information is made available to the user in separate data buffers (for example, parameter setting
data and configuration data). Three change buffers are provided for data communication, both for the output
data and for the input data. A change buffer is always available for communication. Therefore, no resource
problems can occur. For optimal diagnostics support, SPC3 has two diagnostics change buffers into which
the user inputs the updated diagnostics data. One diagnostics buffer is always assigned to SPC3 in this
process.
The bus interface is a parameterizable synchronous/asynchronous 8-bit interface for various Intel and
Motorola microcontrollers/processors. The user can directly access the internal 1.5k RAM or the parameter
latches via the 11-bit address bus.
After the processor has been switched on, procedural-specific parameters (station address, control bits, etc.)
must be transferred to the Parameter Register File and to the mode registers.
The MAC status can be scanned at any time in the status register.
Various events (various indications, error events, etc.) are entered in the interrupt controller. These events
can be individually enabled via a mask register. Acknowledgement takes place by means of the
acknowledge register. The SPC3 has a common interrupt output.
The integrated Watchdog Timer is operated in three different states: ‘Baud_Search’, ‘Baud_Control,’ and
‘DP_Control’.
The Micro Sequencer (MS) controls the entire process.
Procedure-specific parameters (buffer pointer, buffer lengths, station address, etc.) and the data buffer are
contained in the integrated 1.5kByte RAM that a controller operates as Dual-Port-RAM.
In UART, the parallel data flow is converted into the serial data flow, or vice-versa. The SPC3 is capable of
automatically identifying the baud rates (9.6 kBd - 12 MBd).
The Idle Timer directly controls the bus times on the serial bus cable.
SPC3 User Description
Copyright (C) Siemens AG 2002. All rights reserved.
V2.0
Page 9
09/02
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SPC3.PDF ] | |
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