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Troubleshooting and Diagnosis Options 11.2 Use of the PROFIBUS diagnosis In a PROFIBUS system, the PROFIBUS masters provide the so-called host system, e.g. a PLC-CPU, with process data. If there is no slave on the bus or it is no longer accessible, or the slave reports a fault itself, the master must notify the host system of the fault in one form or another. There are several possibilities here, whose evaluation is solely decided by the application in the host system. Generally a host system is not stopped by the failure of just one component on the bus, but must react to the failure in an appropriate way in accordance with the safety regulations. Normally the master firstly provides the host system with a summary diagnosis, which the host system reads cyclically from the master, and through which the user is informed of the state of the individual clients on the bus. If a client is reported defective in the summary diagnosis, the host can request further data from the master (slave diagnosis), which then allows a detailed evaluation of the reasons for the fault. The reports obtained in this way can be generated from the master if the affected slave fails to respond to the master's requests, or they may come directly from the slave if it reports a fault itself. The generation or reading of a diagnosis report between the master and slave takes place automatically and does not need to be programmed by the user. In addition to the standard diagnosis information, the measuring system provides an extended diagnosis report with module status information. 11.2.1 Standard diagnosis The DP standard diagnosis is structured as follows. The perspective is always as viewed from the master to the slave. standard di i Extended diagnosis Byte no. Meaning Byte 1 Station status 1 Byte 2 Station status 2 Byte 3 Station status 3 General part byte 4 Master address byte 5 Manufacturer's identifier HI byte byte 6 Manufacturer's identifier LO byte byte 7 Byte 8 to Byte 241 (max) Length (in bytes) of the extended diagnosis including this byte Further device-specific diagnosis Device-specific extensions Printed in the Federal Republic of Germany © TR-Electronic GmbH 2010, All Rights Reserved 05/25/2011 TR - ECE - BA - DGB - 0079 - 03 Page 193 of 207
Troubleshooting and Diagnosis Options 11.2.1.1 Station status 1 Bit 7 Master_Lock Slave has been parameterized from another master (bit is set by the master) Bit 6 Parameter_Fault The parameter telegram last sent has been rejected by the slave standard diagnosis byte 1 Bit 5 Bit 4 Bit 3 Bit 2 Invalid_Slave_Response Not_Supported Ext_Diag Slave_Cfg_Chk_Fault Is set by the master, if the slave does not respond Slave does not support the requested functions. Bit = 1 means an extended diagnosis report from the slave is waiting The configuration identifier(s) sent from the master has (have) been rejected by the slave Bit 1 Station_Not_Ready Slave is not ready to exchange cyclical data Bit 0 Station_Non_Existent The slave has been configured, but is not available on the bus 11.2.1.2 Station status 2 standard diagnosis byte 2 Bit 7 Deactivated Slave was removed from the poll list from the master Bit 6 Reserved Bit 5 Sync_Mode Is set by the slave after receipt of the SYNC command Bit 4 Freeze_Mode Is set by the slave after receipt of the FREEZE command Bit 3 WD_On The response monitoring of the slave is activated Bit 2 Slave_Status Always set for slaves Bit 1 Stat_Diag Static diagnosis The slave sets this bit if it has to Bit 0 Prm_Req be reparameterized and reconfigured. 11.2.1.3 Station status 3 standard diagnosis byte 3 Bit 7 Ext_Diag_Overflow Overflow for extended diagnosis Bit 6-0 Reserved © TR-Electronic GmbH 2010, All Rights Reserved Printed in the Federal Republic of Germany Page 194 of 207 TR - ECE - BA - DGB - 0079 - 03 05/25/2011
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Rotary Encoders Linear Encoders Mot
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TR-Electronic GmbH D-78647 Trossing
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Contents 5.6 SIN/COS interface / In
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Contents 11 Troubleshooting and Dia
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General information 1 General infor
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General information 1.3 General fun
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General information 1.4 Overview of
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Basic safety instructions 2.2 Gener
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Basic safety instructions 2.4 Safet
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Basic safety instructions 2.6 Organ
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Basic safety instructions ● The m
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Assembly 4 Assembly 4.1 Solid shaft
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Assembly 4.2 Hollow shaft version C
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Assembly Figure 5: Form closure Fig
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Installation / Preparation for Comm
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PROFIBUS / PROFIsafe - Commissionin
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Page 103 and 104: Appendix 15.4 Accessories 490-00101
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