CONTENTS
6.4.5.3.1. Failure Vital Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
6.4.6. NX4010 Redundancy Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
6.4.7. I/O Drivers Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
6.4.8. MainTask Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
6.4.8.1. ActivePrg Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
6.4.8.2. NonSkippedPrg Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
6.4.9. Redundancy Configuration Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
6.4.10. GVL Module_Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
6.4.11. GVLs with Redundant Symbolic Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
6.4.12. POUs from the Program Type with Redundant Symbolic Variables . . . . . . . . . . . . . . 316
6.4.13. Breakpoints Utilization in Redundant Systems . . . . . . . . . . . . . . . . . . . . . . . . . 316
6.4.14. MODBUS Instances Managing in Redundant System . . . . . . . . . . . . . . . . . . . . . 316
6.4.15. Limitations on a Redundant PLC Programming . . . . . . . . . . . . . . . . . . . . . . . . 317
6.4.15.1. Limitations in Redundant GVLs and POUs . . . . . . . . . . . . . . . . . . . . . 317
6.4.15.2. Non-redundant Program Limitations (NonSkippedPrg) . . . . . . . . . . . . . . . 317
6.4.16. Getting the Redundancy State of a Half-Cluster . . . . . . . . . . . . . . . . . . . . . . . . 317
6.4.17. Reading Non-Redundant Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
6.5. Redundant CPU Program Downloading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
6.5.1. Initial Downloading of a Redundant Project . . . . . . . . . . . . . . . . . . . . . . . . . . 318
6.5.1.1. First Step – IP Address Discovering for MasterTool Connection . . . . . . . . . . . 318
6.5.1.2. Second Step – Verifying IP Addresses Conflict . . . . . . . . . . . . . . . . . . . . 319
6.5.1.3. Third Step – Preparing MasterTool Connection (Set Active Path) . . . . . . . . . . 319
6.5.1.4. Forth Step – Identifying the NX3030 CPU and Verifying the CPU Display . . . . . 319
6.5.1.5. Fifth Step – Redundant Project Downloading . . . . . . . . . . . . . . . . . . . . 320
6.5.2. MasterTool Connection with a NX3030 CPU from a Redundant PLC . . . . . . . . . . . . . 321
6.5.3. Modification Download in a Redundant Project . . . . . . . . . . . . . . . . . . . . . . . . 321
6.5.4. Offline and Online Modifications Download . . . . . . . . . . . . . . . . . . . . . . . . . . 321
6.5.4.1. Modifications which Demand Offline Download and the Interruption of the Pro-
cess Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
6.5.4.2. Modifications which Demand Offline Download . . . . . . . . . . . . . . . . . . . 322
6.5.4.3. Modifications which Allow Online Download . . . . . . . . . . . . . . . . . . . . 322
6.5.5. Online Download of Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
6.5.6. Offline Download of Modifications with Process Control Interruption . . . . . . . . . . . . . 323
6.5.7. Previous Planning for Offline Modifications without Process Control Interruption . . . . . . 324
6.5.7.1. Previous Planning for Hot Modifications in Redundant PROFIBUS Networks . . . 324
6.5.7.1.1. Step 1 – Plan Future Expansion of the Remotes Inserted in the PROFIBUS
Network Initial Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
6.5.7.1.2. Step 2 – Insert the Redundant PROFIBUS Network Initial Version in the
Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
6.5.7.1.3. Step 3 – Allocate %I and %Q Variables Areas for the PROFIBUS Network
considering Future Remote Expansion . . . . . . . . . . . . . . . . . . . . 325
6.5.7.2. Previous Planning for Other Hot Modifications . . . . . . . . . . . . . . . . . . . 326
6.5.7.3. Incompatibility of Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
6.5.7.4. Project Update due to MasterTool IEC XE Update . . . . . . . . . . . . . . . . . . 327
6.5.7.4.1. Updating Project from Versions Previous to 2.00 to version 2.00 or Higher . 327
6.5.8. Exploring the Redundancy for Offline downloading of Modifications without Interruption of
the Process control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
6.5.8.1. Step 1 – Verify Basic Requirements Attending . . . . . . . . . . . . . . . . . . . . 328
6.5.8.2. Step 2 – Don’t Download in Group Modifications which can be downloaded Online 329
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