System modifications during operation
17.3 Adding components in PCS 7
S7-400H
294 System Manual, 03/2012, A5E00267695-11
17.3.9 Adding interface modules in PCS 7
Always switch off power before you install the IM460 and IM461 interface modules, external
CP443-5 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 PCS 7, step 2: Offline
modification of the hardware configuration (Page 288))
2. Stop the reserve CPU (se
e section PCS 7, step 3: Stopping the reserve CPU (Page 288))
3. Downlo
ad the new hardware configuration to the reserve CPU (see section PCS 7, step
4: Loading a new hard
ware configuration in the reserve CPU (Page 289))
4. Proceed as follows to expand the subsystem of the present reserve CPU
:
– Switch off the power supply of the reserve subsystem.
– Insert the new IM460 into the central unit, then establish the link to a new expansion
unit.
or
– Add a new expansion unit to an existing chain.
or
– Plug in the new external DP master interface, and set up a new DP master system.
– Switch on the power supply of the reserve subsystem again.
5. Switch to CPU with altered configuration (see section PCS 7, step 5: Switch to CPU with
modified conf
iguration (Page
289))
6. Proceed as follows to expand the subsystem of the original master CPU (currently in
STOP mode):
– Switc
h off the power supply of the reserve subsystem.
– Insert the new IM460 into the central unit, then establish the link to a new expansion
unit.
or
– Add a new expansion unit to an existing chain.
or
– Plug in the new external DP master interface, and set up a new DP master system.
– Switch on the power supply of the reserve subsystem again.
7. Change to redundant system mode (see section PCS 7, step 6: Transition to redundant
system mo
de
(Page 291))
8. Modify and download the
user program (see section PCS 7, step 7: Editing and
downloading the user
program (Page 292))
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