Manuals / Siemens / Computer Equipment / Network Card

Siemens SPC3 manual Example for the RS 485 Interface, SN65ALS1176

Models: SPC3

1 68

Download 68 pages 15.75 Kb

Page 60

PROFIBUS Interface Center	SPC3

9.2

Example for the RS 485 Interface

1

2

3

4

5

6

7

8

9

enil B-

STR

M2

5P2

enil A-

R0

2P5

100K

100K

2M

03

V2

SN65ALS1176

U+

EN1

GND

EN2

1

1

2

>eg : atl tc ovl e a le i sr tne evir reff D iD

sub otn otai ol

si

al

crti

n

2K1

680R

ceel nt:

5P2

8

6

at dn rop a5 m P I

23

2P5

2M

CH1 4

&

2P5

2M

2P5

2M

7

2

300R

1M

1K2

680R

68n

68n

2.2..22nF

680R

500V

HCPL0601

EN

680R

/ 0721

TOU

EN

U-

U+

/ 0721

U+

IN

U-

7721

7217

R00 3

M

HCPL7101 /

U+

IN

U-

HCPL7101 /

U+

U-

EN

TOU

M

680R

n86

M

n86

R0

03

20K

P5

P5

M

RTS

STC

DXT

DXR

Shield

op ss i bl .e

sa

hs tro

sa

ek tp

eb

il en ms tsu

L ya uo :t

Explanations of the circuitry:

The bus driver input EN2 has to be connected to low potential to ensure that after transmission of a telegram the ASIC is able to listen to the transmitted data.

To minimize the capacity of the bus lines the user should avoid additional capacities. The typical capacity of a bus station should be 15 ... 25 pF.

Page 58	V1.3	SPC3 Hardware Description
2003/04		Copyright (C) Siemens AG 2003. All rights reserved.

Image 60

Siemens SPC3 manual Example for the RS 485 Interface, SN65ALS1176

Contents

Simatic NET Page SIM Atic NET Profibus Interface Center SPC3 Hardware DescriptionVersions Release Date ChangesMode Register Status Register Interrupt Controller Watchdog TimerDPBuffer Structure Description of the DP Services Directory11.3 Diagnostics Processing from the System View Asic TestPin Assignment Example for the RS 485 Interface SPC3 Introduction Function Overview Pin Description CmosCPD Cmos with pull down TTLt Schmitt trigger V1.3 Memory Allocation Memory Area Distribution in the SPC35FFH Segment Processor Parameters Latches/Register Significance Write Access OCH 0DH0EH 0FH Organizational Parameters RAM 1AH 1BH1CH 1DHMode Register Asic InterfaceDisstartcontrol Mode Register 1 Mode-REG1, writable STARTSPC3Exiting the Offline state EOIStatus Register Fdlindst Status Register Bit15 . .readableInterrupt Controller SPC3 IRR IMRDxout IMR IARWatchdog Timer Automatic Baud Rate IdentificationBaud Rate Monitoring Response Time MonitoringPROFIBUS-DP Interface DPBuffer StructureUart RAM Aux-Buffer ManagementDescription of the DP Services SetSlaveAddress SAP55Sequence for the SetSlaveAddress Utility SetParam SAP61 Parameter Data StructureParameter Data Processing Sequence CheckConfig SAP62 SPC3Diagnostics Processing Sequence SlaveDiagnosis SAP60SPC3 Structure of the Diagnostics Buffer WriteReadData / DataExchange DefaultSAPWriting Outputs Profibus Interface Center Reading InputsUserWatchdogTimer GlobalControl SAP58GetConfig SAP59 ReadInputs SAP56ReadOutputs SAP57 Hardware Interface Universal Processor Bus InterfaceGeneral Description Bus Interface Unit BIUXINT/MO Mode Bus Interface V1.3Switching Diagram Principles Low Cost System with 80C32System X86-Mode SPC3 Application with the 80 CApplication with th 80 C Interface Signals UartAsic Test Technical Data Maximum Limit ValuesPermitted Operating Values DC-Specifikation of the I/O- DriversAC-Specification for the Output Drivers Tabel 8.3 DC-Specifikation of the I/O- DriversCurrent Tabelle 8.5 Leakage current of the output drivers Timing Characteristics SYS Bus InterfaceClock pulse 48 Mhz Clock Pulse TimingReset Timing in the Synchronous C32-ModeST-Vers Min Max Unit TBDSynchronous Intel-Mode, Processor-Read-Timing Synchronous Intel-Mode, Processor-Write-TimingTiming in the Asynchronous Intel Mode X86 Mode ST-VersParameter Min Max Asynchronous Intel-Mode, Processor-Read-Timing XRD XCS XreadyAsynchronous Intel-Mode, Processor-Write-Timing XWR XCS4.1 74.2 Synchronous Motorola-Mode, Processor-Read-TimingSynchronous Motorola-Mode, Processor-Write-Timing Timing in the Asynchronous Motorola-Mode for example, 68HC16Asynchronous Motorola-Mode, Processor-Read-Timing XCS XdsackAsynchronous Motorola-Mode, Processor-Write-Timing Serial Bus Interface Pulse 48 MHzHousing PQFP-44 Housing SPC3 Hardware Description Symbol Min Typ Max AMI-Vers 13.6513.90 14.15Profibus Interface Pin AssignmentRTS TXDExample for the RS 485 Interface SN65ALS1176Appendix AddressesProfibus User Organisation Technical contact person at ComDeC in GermanyGeneral Definition of Terms Ordering of ASICs10.3.1 SPC3 AMI 10.3.2 SPC3 STAppendix a Diagnostics Processing in Profibus DP Diagnostics Bits and Expanded DiagnosticsIntroduction StatdiagIdentifier Byte 7 has Etc Identifier Byte 0 has Diagnostics Processing from the System View Single DiagnosticsSimatic S5 / COM ET CombiAppendix B Useful Information Data format in the Siemens PLC SimaticPage Siemens Aktiengesellschaft