Max Felser. PROFIBUS Manual. mmww. swwmt. A collection of information explaining. PROFIBUS networks

Transcription

1 Max Felser mmww swwmt A collection of information explaining PROFIBUS networks

2 Contents I Contents 1 Introduction System structure Stations Addressing stations Relationships Cyclic process data Acyclic parameter data Functional scope Standards and guidelines Standardization Guidelines System planning and commissioning Step 1: Prepare Structure of GSD files Step2: Plan Step 3: Install Step 4: Commissioning Risk Functional safety Increased availability Tools GSD editor Bus monitors Master simulators Literature 28 2 Transmission technology Electrical transmission technology Electrical transmission Electrical level Reflections and bus termination 34

3 MBP II Reflections Bus termination for RS Bus termination in the connector Active Bus termination Stub lines with RS Bus cable Cable lengths Stripping cable insulation Connector plugs Terminals D-type connectors Diagnostic sockets Interrupting connectors Mounting connectors M12 plugs M12 plug configuration Repeaters Simple repeater Multiple repeater Modular repeater Diagnostic repeater Design of the RS 485 network Network topology Maximum number of stations Maximum distances Complex structures Isolation on stations Installation check Cable tester BT NetTEST II ScopeWare TopologyScan Synchronous - transmission technology Network layout DP/PAsegment coupler DP/PA link Stub lines Bus termination 76

4 Contents III Cable for PROFIBUS PAwith MBP M12 MBP connector Points to consider regarding intrinsically safe installation i 2.3 Fibre optic (FO) transmission technology System structure FO converters Optical fibres FO connectors Network structure Isolation of a device Long distances Enhanced availability Time calculations level control Electromagnetic interference (EMI) Design measures Planning of distances Use of cable channels laying cable in a switch cabinet Potential equalization Literature FDL: data transmission Services for data transmission SDN: Send Data with No acknowledge S DA: Send Data with Acknowledge SRD: Send and Request Data CSRD: Cyclic Send and Request Data MSRD Send Request Data with Multicast Reply CS: Clock Synchronization FMA: management services Local services Inter-station services FDL parameters 113

5 slave IV 3.3 MAC: medium access control, The master - principle The token passing principle Removing and adding bus users Token rotation time State machine Protocol definitions UARTcoding MBP coding Telegram formats Address byte Length information Function code Service Access Point Checksum Telegram sequences and time ratios Time ratios Error handling Error detection Error correction I Error diagnosis Literature MSO: cyclic data Initialization of a DP slave States of the DP slave Initialization sequence SAP configuration Address changes Setting parameters Set_Parameter telegram Set_Parameter sequence Parameters in the GSD 154

6 Contents V 4.4 Configuration Definition of modules Com pact form at Special format Modules in the GSD Telegrams on the bus Get configuration Check configuration Diagnostics Diagnostic polling Diagnostic coding Diagnostic blocks Cyclic data exchange State of the class 1 master Global control telegram formats SYNC and FREEZE instructions Direct data exchange Publishers Subscribers Cycle times Calculation for single masters Estimation formula Estimation formula PA Equidistant cycle Isochronous cycle Literature MS1/MS2: acyclic data General DP-V1 device model I&M functions l&mo basic information Acyclic services 197

7 VI 5.2 MS1 connection Connection verification Acyclic services Alarm handling Alarm types Alarm sequences Alarm messages Status messages MS2 connection Establishing the connection Monitoring the connection Clearing the connection Acyclic services Function calls Device development Requirements Device classes Forms of construction Assemblies Components 221 Index 224