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

17.6.9

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 1: Editing the
2. Modify and download the user program (see section STEP 7, step 2: Editing and
3. Stop the reserve CPU (see section STEP 7, step 3: Stopping the reserve CPU
4. Download the new hardware configuration to the reserve CPU (see section STEP 7, step
5. Follow the steps below to remove an interface module from the subsystem of the reserve
6. Switch to CPU with altered configuration (see section STEP 7, step 5: Switching to CPU
7. Proceed as follows to remove an interface module from the subsystem of the original
S7-400H
System Manual, 03/2012, A5E00267695-11
hardware configuration offline (Page 314))
downloading the user program (Page 315))
(Page 315))
4: Downloading a new hardware configuration to the reserve CPU (Page 316))
CPU:
– Switch off the power supply of the reserve 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 supply of the reserve subsystem again.
with modified configuration (Page 317))
master CPU (currently in STOP mode):
– Switch off the power supply of the reserve 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 supply of the reserve subsystem again.
System modifications during operation
17.6 Removing components in STEP 7
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