Siemens DP/AS-Interface Link 20E User Manual

Using the Command Interface
69
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
Table 3-1 Coding of the Status Nibble, continued
Status nibble (1st byte of
the digital input data)
Meaning
0 0 0 1 Command processing is completed. With an asynchronous read job, a
2-byte return value can be fetched by the AS-i master. Two situations
must be distinguished:
The return value is 0: A command without response data was completed
without error
The return value is a value not equal to 0: The command was terminated
with error.(See Table 3-3)
A new command can be triggered by the user program
0 0 1 1 Command processing was completed without error. Using an
asynchronous read job, 1 byte of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
0 1 0 1 Command processing was completed without error. Using an
asynchronous read job, 4 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
0 1 1 1 Command processing was completed without error. Using an
asynchronous read job, 14 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
1 0 0 1 Command processing was completed without error. Using an
asynchronous read job, 16 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
1 0 1 1 Command processing was completed without error. Using an
asynchronous read job, 32 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
1 1 0 1 Command processing was completed without error. Using an
asynchronous read job, 56 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
1 1 1 1 Command processing was completed without error. Using an
asynchronous read job, 221 bytes of response data can be fetched by the
AS-i master.
A new command can be triggered by the user program
0 1 0 0 Job processing is completed. The response data or the return value of the
previous job have already been read by the user.
A new command can be triggered by the user program

Siemens DP/AS-Interface Link 20E Specifications

General

Brand	Siemens
Model	DP/AS-Interface Link 20E
Category	Computer Hardware
Language	English

Summary

Technical Description, Installation Instructions, Operation

General Notes on Operation – Safety Warnings

Essential safety precautions and guidelines for operating the DP/AS-i Link 20E module.

Installing the Module

Step-by-step instructions for mounting and installing the DP/AS-i Link 20E module on a standard rail.

Display and Control Elements

Explanation of the LEDs (ADR, BF, SF) and buttons (SET, DISPLAY) on the module's front panel.

Configuring the AS-Interface with the SET Button (Button Configuration)

Guide to commissioning the AS-Interface using the SET button for quick configuration.

Configuring the DP/AS-i Link 20E as a DP Slave on the DP Master

Process of setting up the DP/AS-i Link 20E as a DP slave on a PROFIBUS DP master.

Configuration in STEP 7 – Basic Configuration

Steps for basic configuration of the DP/AS-i Link 20E within STEP 7 HW Config.

Data Exchange Between the DP Master and AS-i Slave

Transferring AS-i Binary Values

Explains how to access binary inputs and outputs of AS-i slaves via the DP master in cyclic mode.

Addressing AS-i Slaves

Information on addressing AS-i slaves for input/output data mapping on the DP master.

Transferring AS-i Analog Values

Details on reading and writing analog values using acyclic PROFIBUS-DP V1 services.

Programming

Explanation of job parameters and data consistency for analog value transfer programming.

Using the Command Interface

Command Interface of the DP/AS-Interface Link 20E

How to control AS-i master responses from a user program via the command interface.

Description of the AS-i Slave Commands

Comprehensive reference for commands sent from DP master to DP/AS-i Link 20E for AS-i slave control.

Set_Permanent_Parameter

Command to configure a parameter value permanently stored in the DP/AS-i Link 20E EEPROM for an AS-i slave.

Write_Parameter

Command to pass a parameter value to an AS-i slave, stored temporarily in the DP/AS-i Link 20E.

Store_Actual_Parameters

Command to overwrite configured parameters with current actual parameters for all AS-i slaves.

Slave Diagnostics

Overview

General overview of slave diagnostics and error signaling to the DP master.

Station Status 1 to 3

Details on interpreting the diagnostic status bits for DP slave operation.

Structure of the Device-Related Diagnostic Information

Description of the structure for device-related diagnostic information.

Dealing with Problems/Error Displays

Replacing a Defective AS-i Slave/Automatic Address Programming

Guide to replacing failed AS-i slaves using the automatic address programming feature.

Error Displays/Remedying Errors

Lists common error causes and remedies for DP/AS-i Link 20E module operation.

Appendix A: AS-Interface Protocol Implementation Conformance Statement (PICS)

Part B Supported Slave Profiles

Lists supported AS-i slave profiles for analog slaves, detailing S7.3 and S7.4 integration.

How the AS-i cycle time depends on the number of connected slaves

Formula and explanation for calculating AS-i cycle time based on the number of connected slaves.

Appendix B: Structure of the PROFIBUS DP Parameter Assignment and Configuration Frame

Configuration Frame

Describes the structure of the configuration frame based on I/O operation requirements.

Structure of the Parameter Assignment Frame

Details the standard and user-specific parameter assignment frame structure.

Appendix C: References

Appendix D: Notes on the CE Mark

Area of Application

Details the product's compliance with noise emission and noise immunity requirements.

Appendix E: Glossary

E.1 Terms Relating to AS-Interface

Glossary of key terms and acronyms specific to the AS-Interface system.

E.2 Terms Relating to PROFIBUS

Glossary of essential terms and acronyms relevant to the PROFIBUS communication protocol.