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

14.6.9

Removing interface modules in STEP 7

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 7, step I: Offline
2. Modify and download the user program (see section STEP 7, step II: Editing and
3. Stop the standby CPU (see section STEP 7, step III: Stopping the standby CPU (Page 229))
4. Download the new hardware configuration to the standby CPU (see section STEP 7,
5. Follow the steps below to remove an interface module from the subsystem of the standby
6. Switch to CPU with altered configuration (see section STEP 7, step V: Switch to CPU with
7. To remove an interface module from the subsystem of the original master CPU (currently
8. Change to redundant mode (see section STEP 7, step VI: Transition to redundant state
9. Modify and download the user organization blocks (see section STEP 7, step VIII: Editing
S7-400H
System Manual, 09/2007, A5E00267695-03
modification of the hardware configuration (Page 228))
downloading the user program (Page 228))
step IV: Loading new hardware configuration in the standby CPU (Page 229))
CPU:
– Switch off power to the standby subsystem.
– Remove an IM460 from the central unit.
or
– Remove an expansion unit from an existing chain.
or
– Remove an external DP master interface module.
– Switch on the power to the standby subsystem again.
modified configuration (Page 230))
in STOP mode):
– Switch off power to the standby subsystem.
– Remove an IM460 from the central unit.
or
– Remove an expansion unit from an existing chain.
or
– Remove an external DP master interface module.
– Switch on the power to the standby subsystem again.
(Page 231))
and downloading organization blocks (Page 232))
System modifications in operation
14.6 Removing components in STEP 7
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