Siemens SIMATIC S7-400H System Manual page 323

Configuring stand-alone mode
Requirement: No synchronization module may be inserted in the fault-tolerant CPU.
Procedure:
1. Insert a SIMATIC-400 station in your project.
2. Configure the station with the fault-tolerant CPU according to your hardware setup. For
3. Configure the parameters of the fault-tolerant CPU. Use the default values, or customize
4. Configure the necessary networks and connections. For stand-alone operation you can
For help on procedure refer to the Help topics in SIMATIC Manager.
Expansion to a fault-tolerant system
You can only expand your system to a fault-tolerant system if you have not assigned any
odd numbers to expansion units in stand-alone mode.
To expand the fault-tolerant CPU later to form a fault-tolerant system:
1. Open a new project and insert a fault-tolerant station.
2. Copy the entire rack from the standard SIMATIC-400 station and insert it twice into the
3. Insert the subnets as required.
4. Copy the DP slaves from the old stand-alone project to the fault-tolerant station as required.
5. Reconfigure the communication connections.
6. Carry out all changes required, such as the insertion of one-sided I/Os.
For information on how to configure the project refer to the Online Help.
Changing the operating mode of a fault-tolerant CPU
The procedure for changing the operating mode of a fault-tolerant CPU differs depending on
the operating mode you want to switch to and rack number configured for the CPU:
Changing from redundant to stand-alone mode
1. Remove the synchronization modules.
2. Remove the CPU.
3. Set rack number 0 on the CPU.
4. Install the CPU.
5. Download a project with the stand-alone configuration to the CPU.
S7-400H
System Manual, 09/2007, A5E00267695-03
stand-alone operation, insert the fault-tolerant CPU in a standard rack (Insert > Station >
S7–400 station in SIMATIC Manager).
the necessary parameters.
configure "fault-tolerant" S7 connections.
WARNING
fault-tolerant station.
Stand-alone operation
323