Siemens SIMATIC S7 Product Information page 21

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Transition to redundant system mode (see Section 10.2.6 for PCS7 or Section 10.4.7 for
STEP7)
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Change and load the user program (see Section 10.2.7 for PCS7 or 10.4.8 for STEP7)
Adding Interface Modules in the Case of Standby Subsystem
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Change the hardware configuration offline (see Section 10.2.2 for PCS7 or Section 10.4.2
for STEP7)
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STEP7 only: Add to and load organization blocks (see Section 10.4.3)
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Stop the standby CPU (see Section 10.2.3 for PCS7 or Section 10.4.4 for STEP7)
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Switch off the power supply to the standby subsystem
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Insert the IM460 in the base unit and set up a connection to a new expansion rack, add a
new expansion rack to an existing chain, or insert an external DP master interface and set
up a new DP master system
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Switch on the power supply to the standby subsystem again
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Download the new hardware configuration to the standby CPU (see Section 10.2.4 for
PCS7 or Section 10.4.5 for STEP7)
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Switch to the CPU with a modified configuration (see Section 10.2.5 for PCS7 or
Section 10.4.6 for STEP7)
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Transition to redundant system mode (see Section 10.2.6 for PCS7 or Section 10.4.7 for
STEP7)
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Change and load the user program (see Section 10.2.7 for PCS7 or 10.4.8 for STEP7)
Adding Interface Modules in the Case of the Master and Standby Subsystems
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Change the hardware configuration offline (see Section 10.2.2 for PCS7 or Section 10.4.2
for STEP7)
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STEP7 only: Add to and load organization blocks (see Section 10.4.3)
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Stop the standby CPU (see Section 10.2.3 for PCS7 or Section 10.4.4 for STEP7)
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Switch off the power supply to the standby subsystem
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Insert the external DP master interface and set up a new DP master system
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Switch on the power supply to the standby subsystem again
A5E00130864-03
CPU 417-4H
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