Default Addressing | Siemens S7-400 manual

Addressing the S7-400

Default Addressing

Under certain conditions, the CPU can handle the assignment between logical address and geographical address for you (default addressing). The logical addresses are then permanently assigned to the slots (default address). Distributed I/Os are not taken into account.

Conditions for Default Addressing

The CPU assigns default addresses under the following conditions:

•No multicomputing

•If only signal modules are inserted

(no IM, CP, FM inserted; no expansion racks connected)

•If signal modules are used with their default settings (measuring ranges, interrupt processing, etc.)

•If modules are inserted in STOP mode or during power off

(modules inserted while the system is in RUN or during a RUN → STOP → RUN transition will be ignored)

Automation System S7-400	Hardware and Installation	3-3
A5E00850741-01		3-3

Image 55

Siemens S7-400 installation manual Conditions for Default Addressing

Contents

Simatic Safety Guidelines Approvals Purpose of the ManualRequired Basic Knowledge Scope of this Manual Training Centers NavigatingRecycling and Disposal Further Support Technical Support Service & Support on the Internet Preface Contents Contents Assembling and Installing Systems Maintenance Figures Routing Equipotential Bonding Conductor and Signal Line Tables Overview of the S7-400 Features of the S7-400 Components Function Illustration S7-400 components Location of the order number and product version Example of a rating plate Section Description Chapter Overview Introduction S7-400 InstallationCentral Rack CR and Expansion Rack ER Local Connection Remote Connection Connecting the CR and ERsConnecting with a 5 V Supply Overview of the Connections Ways of Connecting Central and Expansion Racks Type of Connection Maximum Total Cable Length Rules for Connection Racks in the S7-400 System Installing the Central Rack CR and Expansion Rack ERRack No. Available Application Characteristics Slots Buses Function of the Racks Rack with I/O Bus and Communication Bus Electrical SupplyBus Communication Bus C Bus Properties Segmented CR Subdivided CR Characteristics Mounting and Grounding the Racks Important Notes on InstallationRetaining Distances Between Devices Dimensions of the Racks Mounting the Rack Mounting Screws Connecting the Rack to the Chassis GroundScrew Type Explanation Mounting Additional Racks 840 mm Cable duct/fan subassembly Reference Point Connection to the Reference Point Ungrounded configuration Grounded configurationM4 x Methods of Ventilation Methods of Ventilation Wall Changing the Ventilation Filter Mat Optional Shipping state Procedure Installing the Fan Subassembly Monitoring the Fan Subassembly Installing the Cable Duct Why Cabinets are Required Choosing and Setting up Cabinets with the S7-400Types and Dimensions of Cabinets Open Cabinets Closed Cabinets Removable Power Dissipation from Cabinets Example Example of selecting the cabinet type Cabinet dimensionsType of Cabinet Max. Permissible Ambient Modules Rules for the Arrangement of ModulesArrangement of the Modules Space Requirement of the Racks Installation Sequence Installing Modules in a RackTool Removing the Cover Screwing the Modules in Place Attaching the Modules Slot Number Marking the Modules with Slot LabelsFitting Slot Labels Distributed I/Os Methods of Expansion and NetworkingNetworking Accessories Accessories Installing the S7-400 Addressing the S7-400 Logical Addresses Geographical and Logical AddressesAddresses Geographical Addresses Conditions for Default Addressing Default Addressing Default Addresses of Digital Modules How to Determine the Default Address of a ModuleExample Default Addresses of Analog Modules Channel on a Digital Module How to Determine the Default Address of a Channel Channel on an Analog Module Addressing the S7-400 Wiring the S7-400 Power Supply Modules and Load Current Power Supplies Supplying Power to Modules Module Quantity +5 VDC Max. Current Consumption Choosing the Power Supply ModuleEstimating the Power Requirement Calculation Example Determining the Load Current Choosing the Load Current Power SupplyChoosing the Load Current Power Supply Load Current Power Supplies Rule Grounding the Load Current Circuits Assembling an S7-400 with Process I/OsDefinition of a Grounded Supply TN-S Network Components and Protective Measures CPU S7-400 in the Overall Installation Terminal Connection Model Assembling an S7-400 with Grounded Reference Potential MApplication Discharge of Interference Currents An S7-400 Configured with Ungrounded Reference Potential Power Supply Units Insulation Monitoring Filtering the 24 VDC SupplyExample of Ungrounded Operation Definition Assembling an S7-400 with Isolated ModulesIsolated Modules and Grounding Concept Configuration with Isolated Modules Parallel Wiring of Digital S7-400 Outputs Device Grounding Method GroundingGround Connections Protective Ground Mode Connection of Load Voltage Connecting the Load Voltage Ground Interference-Free Configuration for Remote Connections Interference-Free Configuration for Local ConnectionsUse only Approved Components Special Cases Lines and Tools Wiring Rules Power Supply Connector Wiring the Power Supply ModuleDisconnecting the Power Supply Connector Wiring the Power Supply Connector AC DC L1 L+ 11 Plugging the power supply connector Plugging In the Power Supply Connector Three Types of Front Connector Wiring the Signal Modules 12 Preparing to wire the front connector Preparing to Wire the Front Connector 13 Wiring a Front Connector with Crimp Terminals Wiring the Front Connector, Crimping 14 Wiring a Front Connector with Screw-Type Terminals Wiring the Front Connector, Screw Terminals 15 Wiring a Front Connector with Spring-Type Terminals Wiring the Front Connector, Spring-Type Terminals 16 Principle of the spring contact Principle of the spring loaded terminal Cable Ties as Strain Relief Fitting the Strain Relief Labels and Terminal Diagram Labeling a Front Connector Labels 19 shows details for fitting a label in the front connector Order Number Description How to Label S7-400 Modules Principle of a Coding Key Fitting the Front ConnectorFront Connector Coding on the Signal Modules Plugging In the Front Connector 20 Attaching the Front Connector 21 shows how to screw on the front connector Interconnecting the Interface Modules Interconnecting the CR and ERs 23 Connection Between a Send IM and Two Receive IMs Wiring the Fan Subassembly Setting the Fan Subassembly to the Line VoltageFuse Routing Fiber-Optic Cables Cable routing in cable ducts or fan subassemblies Networking Subnets Configuring a NetworkSame Configuration Configuring Communication Baud Rate FundamentalsStation = Node Segment MPI/PROFIBUS-DP Addresses Default MPI AddressesNode Device Default MPI Address Default Highest MPI Number of Nodes PG / OP -- Module communication without MPI Rules for MPI AddressesMaximum Number of Connections via MPI PG Access Rules Rules for Configuring a Network Components Data Packets in the MPI NetworkRecommendation for MPI Addresses Recommendation for PROFIBUS-DP Addresses Terminating Resistor on the RS 485 Repeater Terminating Resistor on the Bus Connector Example Terminating Resistor in the MPI Network Example of an MPI Network Example of a PROFIBUS-DP Network PROFIBUS-DP Example Using a CPU Programming device access beyond network limits Programming Device Access Beyond Network Limits Routing Longer Cable Lengths Cable LengthsSegment in the MPI Network Segment in the PROFIBUS-DP Network Lengths of Spur Lines 10 Configuration of an MPI network Rules for Laying Cables Characteristics of the PROFIBUS-DP Bus CablePROFIBUS-DP Bus Cables PROFIBUS-DP Bus Cables Purpose of the Bus Connector Bus ConnectorsAppearance 6ES7972-0B.20 Connecting the Bus Connector Connecting Bus Cables to Bus Connectors 6ES7972-0B.20Removing the Bus Connector RS 485 Repeater / Diagnostics Repeater Electrical/Optical Conversion PROFIBUS-DP Network with Fiber-Optic CablesBenefits and Areas of Application Transmission Rate Optical PROFIBUS-DP Network in Partyline Topology Profibus Optical Bus Terminal OBT Features of the Fiber-Optic Cables Cable grip Simatic NET Profibus PCF fiber-optic, standard cable Order NumbersPrerequisite Simatic NET Profibus plastic fiber-optic, standard cable Structure Accessories Order Number Laying Plastic Fiber-Optic Cable Cable LengthsMixed Use of Plastic Fiber-Optic and PCF Fiber-Optic Cable Laying PCF Fiber-Optic Cable Rules for Laying Cable Installing the Connector Adapter Networking Commissioning Recommended Procedure Recommended Procedure for First StartupHow to Proceed in the Case of an Error Grounding and Chassis Ground Concept Checks Prior to Switching On for the First TimeChecks Prior to Switching On for the First Time Mounting and Wiring Modules Power Supply Module Module SettingsLine Voltage Connecting a Programming Device PG to an S7-400 Connecting a Programming Device PG to an S7-400If You Then Communication between Programming Device and CPU Switching On an S7-400 for the First TimeSwitching On an S7-400 for the First Time Switching On an H System for the First Time How to Perform a Memory Reset Resetting the CPU with the Mode Selector SwitchHow to Carry Out a Memory Reset When Should a CPU be Reset? Resetting the CPU with the Mode Selector Switch What Remains Following the Memory Reset What Happens in the CPU During a Memory ResetSpecial Case MPI Parameters Control sequence for restart warm restart / hot restart Cold, Warm, and Hot Restarts with the Mode Selector SwitchRestart warm start Hot restart Memory Card as Load Memory Inserting a Memory CardWhat Type of Memory Card Should You Use? Inserting a Memory Card Backup Inserting a Backup Battery OptionInserting a Backup Battery Commissioning Commissioning Reducing the Passivation Layer Removing a Backup Battery Behavior of the CPU During Startup Starting Up a PROFIBUS-DP SubnetRequirements Starting Up Available Interface Modules Installing Interface Modules Covering Unused Submodule Slots Commissioning Maintenance Replacing the Backup Battery Replacing the Backup Battery Rules for the Care of Backup Batteries Using Backup Batteries How the S7-400 Behaves after Exchanging Modules Replacing a Power Supply ModuleInstalling a New Module Slot Numbering Saving the Data Replacing CPUsRemoving the Module Installing a New Module Replacing Digital or Analog Modules Installing a Module Exchanging the Front Connector Removing the Front Connector Coding Key Changing the Fuses Changing the Fuses in the Digital ModulesModules with Fuses Check the Plant How the S7-400 Behaves after Replacing the Fuse Hot--swapping Modules Replacing Interface ModulesRemoving Modules / Exchanging Cables Installing a New Module Fuse Type Replacing the Fuse of the Fan SubassemblyReplacing the Fuse Removing the Fans Replacing Fans in the Fan Subassembly During Operation Maintenance Replacing the Filter Frame Maintenance Exchanging the Mother Board Replacing Interface Submodules Installing Interface SubmodulesAvailable Interface Submodules Inserting an Interface Submodule in a CPU Assembling and Installing Systems Emergency OFF Devices General Rules and Regulations for Operating the S7-400General Basic Rules Specific Application With You Must Ensure 120/230 VAC SupplyVDC Supply Protection Against External Electrical Effects Protection against By Means Protection Against Other Electrical Effects Definition EMC Principles of System Installation for EMCPossible Effects of Interference Radiated Interference Coupling MechanismsCapacitive Coupling Inductive Coupling Rule 3 Secure Cable Shields Five Basic Rules for Ensuring Electromagnetic CompatibilityRule 1 Large Area Grounding Rule 2 Correct Cable Routing Rule 5 Standard Reference Potential Rule 4 Special EMC MeasuresSee also Inactive Metal Parts Installation of Programmable Controllers for EMCGrounding of Inactive Metal Parts During Installation Ensure the following when chassis grounding Example 1 Cabinet Configuration for EMC Examples of EMC-Compatible Assembly Example 2 EMC--compliant Wall Mounting Key for example Figure A-3 shows an example of wall mounting for EMC Ensure the following for frame and wall mounting Suitable Cables Shielding CablesPurpose of the Shielding Principle of Operation Figure A-4 Mounting Cable Shields Handling the Shields Potential Differences Equipotential BondingEquipotential Bonding Conductor Assembling and Installing Systems Inside cabinets How to Read the TableCabling Inside Buildings Connect Cables for Run Ethernet Overvoltage Protection Devices Cabling Outside BuildingsRules for EMC Rules for Lightning Protection Outside Buildings Overview Lightning Protection and Overvoltage Protection Surges Effects of a Lightning Strike Figure A-6 Lightning Protection Zones of a Building Diagram of the Lightning Protection Zones Ser Cables for Equip transition point 0 With Additional MeasuresOrder No Dehn + Söhne Lightning Protection Element for the 24 VDC Supply Lightning Protection Element for Signal Modules Ser Cables for Equip transition point 1 2 with Order No Low-Voltage Protection Elements for 1 Ser Cables for Equip transition point Order No With Low-Voltage Protection Elements for 2 Lightning-protection 0, field side zone Sample CircuitLightning-protection zone Ser. No Components Description From fi Gure A-7 Components in figure A-7 Integrated Surge Arrester Inductive Surge VoltageAdditional Overvoltage Protection Suppression with Diodes / Zener Diodes Suppression for DC-Operated CoilsSuppression with AC-Operated Coils Intoduction Reliability Safety of Electronic Control EquipmentRisks Important Information Operation under Low-Interference Conditions Interference-Free Connection of MonitorsOperation under Industrial Conditions Shielding and Grounding under Industrial Conditions Isolated Section You will find What is ESD? Charging Electrostatic Charging of Persons Avoid Direct Contact Ensure Sufficient Grounding Bit Memory M Backup BatteryAddress Analog Module Chassis Ground ConfigurationConfiguring Central module Cyclic Interrupt Default SettingCounters Cycle time DP Slave Diagnostic BufferDiagnostic Interrupt DP Master Error Response Error DisplayFunction Global Data Communication Functional GroundingFunction Block FB Function Module FM Interrupt, Cyclic Hardware InterruptInstance Data Block Interface, Multipoint Manufacturer--specific interrupt Load MemoryLocal Data Logic Block Node Number MPI AddressNesting Depth Network Organization Block OB OB PriorityOperating State Operating System of the CPU Programming Device PG Parameters, StaticPriority classes Process Image Retentive Data Run-Time ErrorReference Ground Reference Potential Substitute Value Signal ModuleSlave Status interrupt System Function Block SFB System DiagnosticsTime-Delay Interrupt System Function SFC Total Current Timer TToggle switch Update interrupt Work Memory VaristorWarm Restart Watchdog interrupt Index Index Index-3 Index-4