Siemens SIMATIC S7-400H System Manual page 449

Fault tolerance-specific LEDs
The REDF, IFM1F, IFM2F, MSTR, RACK0 and RACK1 LEDs show the reaction specified in
the table below in stand-alone mode.
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
3. Parameterize the fault-tolerant CPU. Use the default values, or customize the necessary
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
S7-400H
System Manual, 03/2012, A5E00267695-11
LED
REDF
IFM1F
IFM2F
MSTR
RACK0
RACK1
configuration. For stand-alone operation, insert the fault-tolerant CPU in a standard rack
(Insert > Station > S7–400 station in SIMATIC Manager).
parameters.
configure "fault-tolerant S7 connections".
WARNING
fault-tolerant station.
required.
Stand-alone operation
Behavior
Dark
Dark
Dark
Lit
Lit
Dark
449