Removing Interface Modules In Step 7 - Siemens SIMATIC S7-400H Manual

Modifying the System During Operation
11.5.9

Removing Interface Modules in STEP 7

The removal of the IM460 and IM461 interface modules, the external DP master
interface module CP443-5 Extended and the associated connecting cables is only
permitted in a deenergized state.
The power supply of the entire subsystem must be switched off. To ensure this has
no effect on the process, it must be executed when this subsystem is in STOP
mode.
Procedure
1. Change the hardware configuration offline (see Section 11.5.1)
2. Modify and download the user program (see Section 11.5.2)
3. Stop the standby CPU (see Section 11.5.3)
4. Download the new hardware configuration to the standby CPU (see
Section 11.5.4)
5. If you want to remove an interface module from the subsystem of the current
standby CPU, carry out the following steps:
– Turn off the power supply for the standby subsystem.
– Remove an IM460 from the central controller.
or
– Remove an expansion unit from an existing line.
or
– Remove an external DP master interface.
– Turn on the power supply for the standby subsystem again.
6. Switch to the CPU with the modified configuration (see Section 11.5.5)
7. If you want to remove an interface module from the subsystem of the original
master CPU (currently in STOP mode), carry out the following steps:
– Turn off the power supply for the standby subsystem.
– Remove an IM460 from the central controller.
or
– Remove an expansion unit from an existing line.
or
– Remove an external DP master interface.
– Turn on the power supply for the standby subsystem again.
8. Switch to redundant system mode (see Section 11.5.6)
9. Modify and download the organization blocks (see Section 11.5.8)
11-40
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07