System modifications during operation
17.5 Adding components in STEP 7
S7-400H
System Manual, 03/2012, A5E00267695-11
311
17.5.10 Adding interface modules in STEP 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 STEP 7, step 2: Offline
modification of the hardware configuration (Page 305))
2. Expand and download the
organization blocks (see section STEP 7, step 3: Expanding
and downloading OBs
(Page 305))
3. Stop the reserve CPU (se
e section STEP 7, step 4: Stopping the reserve CPU
(Page 306))
4. Download the
new hardware configuration to the reserve CPU (see section STEP 7, step
5: Loading a new hard
ware configuration in the reserve CPU (Page 306))
5. 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.
6. Switch to CPU with altered configuration (see section STEP 7, step 6: Switch to CPU with
modified conf
iguration (Page
307))
7. 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.
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