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System modifications during redundant operation
10.4 Removal of components
3. Unplug components that are no longer required from the modular DP stations.
4. Remove DP stations that are no longer required from the DP master systems.
Note
With switched I/O: Always complete all changes on one segment of the redundant DP
master system before you modify the next segment.
Result
The removal of non-configured modules does not influence the user program. The same
applies to removing DP stations.
The fault-tolerant system continues to operate in redundant system mode.
10.4.8
Removal of interface modules
Always switch off the power before you remove the IM460 and IM461 interface modules,
external CP 443-5 Extended DP master interface module, and their connecting cables.
Always switch off power to an entire subsystem. To ensure that this does not influence the
process, always set the subsystem to STOP before you do so.
Procedure
1. Change the hardware configuration offline (see section Step 1: Modify the hardware
configuration offline (Page 149))
2. Modify and download the user program (see section Step 2: Modify and download the
user program (Page 149))
3. Stop the reserve CPU (see section Step 3: Stop the standby CPU (Page 150))
4. Download the new hardware configuration to the reserve CPU (see section Step 4:
Download new hardware configuration to the standby CPU (Page 151))
5. Follow the steps below to remove an interface module from the subsystem of the reserve
CPU:
– Switch off the power supply of the reserve subsystem.
– Remove an IM460 from the central unit.
– Remove an expansion unit from an existing chain.
– Remove an external DP master interface module.
– Switch on the power supply of the reserve subsystem again.
6. Switch to CPU with altered configuration (see section Step 5: Switch to CPU with
modified configuration (Page 151))
154
or
or
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
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