Siemens 928B User Manual

5-42
System Manual
C79000-G8576-C199-07
5.4 CPU 928B
This section contains the hardware description and technical specifications of
the CPU 928B.
Details on programming the CPU 928B can be found in the
CPU 928B Programming Guide.
5.4.1 Technical Description
You can use the CPU 928B in single and multiprocessor operation in the
S5-135U/155U central controller (see Chapter 6). Up to four CPUs can be
used.
The CPU 928B is universally applicable, ensuring both very fast
bit processing and very fast word processing:
 Cyclic
 Time-controlled (9 different timebases)
 Real-time controlled
 Interrupt-driven (hardware interrupt)
 Delayed (from Version 6ES5 928-3UB12)
The programming language is STEP 5.
The electronic circuitry of the CPU 928B is on two PCBs (basic and
expansion boards) in the double Eurocard format. Both PCBs are screwed
together, linked via connectors, and must not be separated. The basic board
provides the connection to the S5 bus via two backplane connectors.
The front plate width is 2 2/3 standard plug-in stations.
Application
Design
CPUs, Memor
y
Cards, Memor
y
Submodules, Interface Submodules

Siemens 928B Specifications

General

Brand	Siemens
Model	928B
Category	Computer Hardware
Language	English

Summary

CPU 928B Hardware and Specifications

Technical Description

Hardware description and technical specifications of the CPU 928B.

Application Details

Describes the use of CPU 928B in single and multiprocessor systems.

Physical Design

Details the electronic circuitry and physical format of the CPU 928B.

User Memory Requirements

Explains requirements for user memory submodules (RAM/EPROM) and integrated DB RAM.

PG Interface SI1

Covers the first PG interface for connecting programmers and OPs.

Second Interface SI2

Describes the optional second interface for various communication protocols.

Process Interrupt Handling

Explains how the CPU handles process interrupts and priority events.

Installation and Startup

Procedures for installing, removing, and starting up the CPU 928B module.

Jumper Settings Guidance

Notes that jumper settings are for manufacturer quality testing and should not be changed.

Module Insertion Procedure

Provides step-by-step instructions for inserting the CPU module into the central controller.

Module Removal Procedure

Details the procedure for safely removing the CPU module from the central controller.

Controls and Indicators

Identifies and explains the controls, indicators, and their functions on the CPU module front plate.

Front Plate Layout

Illustrates and labels the controls and indicators on the front plate of the CPU 928B.

Mode Switch Operation

Explains the operation of the RUN and STOP modes via the mode switch.

Momentary-Contact Switch Operations

Describes the functions of Overall Reset, Reset, and Restart via the momentary-contact switch.

Status Indicators

Explains the meaning of various LEDs indicating CPU status, faults, and interface activity.

RUN/STOP LED Status Meanings

Details the meaning of the RUN and STOP LEDs in different CPU states.

Fault Indication LEDs

Explains the purpose and behavior of fault indication LEDs like QVZ, ADF, ZYK, and BASP.

QVZ LED Status and Causes

Describes the conditions and possible causes for the QVZ LED being lit.

ADF, ZYK, BASP LED Status

Explains the meaning of the ADF, ZYK, and BASP LEDs indicating specific faults or conditions.

Startup Procedures

Details the steps for performing overall reset, reset, and restart operations.

Overall Reset Procedure

Outlines the steps for performing an overall reset of the CPU 928B.

Reset Procedure

Details the steps to perform a standard reset of the CPU 928B.

Restart Procedure

Explains how to restart the CPU 928B, including manual restart.

Technical Specifications

Lists detailed technical specifications, approvals, and physical properties of the CPU 928B.

Approvals and Certifications

Lists the important approvals and certifications for the USA and Canada.

Environmental and Electrical Specs

Covers degree of protection, ambient conditions, supply voltage, and current consumption.

Memory and Block Capacities

Details user memory, DB RAM, program block, sequence block, function block, and data block capacities.

Interface and Physical Specs

Provides details on serial interfaces, backplane bus, dimensions, and weight.