Step 7, Step 1: Modification Of Hardware - Siemens SIMATIC S7-400H Manual

11.4.1

STEP 7, Step 1: Modification of Hardware

Initial situation
The fault-tolerant system is working in redundant system mode.
Procedure
1. Add the new components to the system.
– Plug new central modules into the rack.
– Plug new module into existing modular DP stations
– Add new DP stations to existing DP master systems.
Notice
With switched I/O: Complete all changes on one line of the redundant DP master
system first before making changes to the second line.
2. Connect the required sensors and actuators to the new components.
Result
Plugging in modules that have not yet been configured will have no effect on the
user program. The same applies to adding DP stations.
The fault-tolerant system continues to work in redundant system mode.
New components are not yet addressed.
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Modifying the System During Operation
11-25