Summary
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6. REDUNDANCY WITH NX3030 CPU .................................................................................................... 263
Introduction ............................................................................................................................................. 263
Technical Description and Configuration ............................................................................................... 265
Minimum Configuration of a Redundant CPU (Not Using PX2612 Panel) ......................................... 265
Typical Configurations of a Redundant CPU ...................................................................................... 265
NX4010 Module ................................................................................................................................ 266
Redundancy Control Panel PX2612 ................................................................................................... 267
Interconnections between Half-Clusters and the Redundancy Control Panel PX2612 .......................... 269
General Features ................................................................................................................................ 270
Purchase Data .................................................................................................................................... 272
Principles of Operation ............................................................................................................................ 273
NX3030 CPU Identification ............................................................................................................... 273
Single Redundant Project ................................................................................................................... 273
Redundant Project Structure ............................................................................................................... 273
Multiple Mapping .............................................................................................................................. 278
Diagnostics, Commands and User Data Structure ............................................................................... 279
Cyclic Synchronization Services through NETA and NETB ............................................................... 280
Sporadic Synchronization Services through NETA and NETB ........................................................... 281
Project Synchronization Disabling ..................................................................................................... 282
PROFIBUS Network Configuration ................................................................................................... 283
Redundant Ethernet Networks with NIC Teaming .............................................................................. 284
IP Change Methods ............................................................................................................................ 284
NIC Teaming and Active IP Combined Use ....................................................................................... 288
Ethernet Interfaces Use with Vital Fault Indication............................................................................. 288
OPC Communication Use with Redundant Projects............................................................................ 289
Redundant CPU States ....................................................................................................................... 289
PX2612 Redundancy Command Panel Functions ............................................................................... 291
Transition between Redundancy States .............................................................................................. 293
First Instants in Active State .............................................................................................................. 296
Common Failures which Cause Automatic Switchovers between Half-Clusters .................................. 296
Failures Associated to Switchovers between Half-Clusters Managed by the User ............................... 297
Fault Tolerance .................................................................................................................................. 298
Redundancy Overhead ....................................................................................................................... 300
Redundant CPU Programming ............................................................................................................... 300
Wizard for a New Redundant Project Creation ................................................................................... 300
Half-Clusters Configuration ............................................................................................................... 305
Ethernet Ports Configuration in the CPU NX3030 (NET 1 and NET 2) .............................................. 305
NX5001 Modules Configuration ........................................................................................................ 307
NX5000 Modules Configuration ........................................................................................................ 309
NX4010 Redundancy Configuration .................................................................................................. 310
I/O Drivers Configuration .................................................................................................................. 311
MainTask Configuration .................................................................................................................... 311
Redundancy Configuration Object ..................................................................................................... 313
GVL Diagnostics ............................................................................................................................... 313
GVLs with Redundant Symbolic Variables ........................................................................................ 313
POUs from the Program Type with Redundant Symbolic Variables.................................................... 314
Breakpoints Utilization in Redundant Systems ................................................................................... 314
MODBUS Instances Managing in Redundant System ........................................................................ 314
Limitations on a Redundant PLC Programming.................................................................................. 314
Getting the Redundancy State of a Half-Cluster ................................................................................. 315
Reading Non-Redundant Diagnostics ................................................................................................. 315
Redundant CPU Program Downloading ................................................................................................. 316
Initial Downloading of a Redundant Project ....................................................................................... 316
MasterTool Connection with a NX3030 CPU from a Redundant PLC ................................................ 318
Modification Download in a Redundant Project ................................................................................. 319
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