System modifications during operation
17.6 Removing components in STEP 7
S7-400H
System Manual, 03/2012, A5E00267695-11
313
17.6 Removing components in STEP 7
Starting situation
You have verified that the CPU parameters (e.g. monitoring times) match the planned new
program. Adapt the CPU parameters first, if necessary (see section Editing CPU parameters
(Page 323)).
The mod
ules to be remo
ved and their connected sensors and actuators are no longer of any
significance to the process being controlled. The fault-tolerant system is operating in
redundant system mode.
Procedure
Carry out the steps listed below to remove hardware components from a fault-tolerant
system in STEP 7. Details of each step are described in a subsection.
Step What to do? See section
1 Editing the hardware configuration offline STEP 7, step 1: Editing the hardware
configuration offline (Page 314)
2 Editing and downloading the user program STEP 7, step 2: Editing and downloading the
user program (Page 315)
3 Stopping the reserve CPU STEP 7, step 3: Stopping the reserve CPU
(Page 315)
4 Downloading a new hardware configuration to the reserve
CPU
STEP 7, step 4: Downloading a new hardware
configuration to the reserve CPU (Page 316)
5 Switching to CPU with modified configuration STEP 7, step 5: Switching to CPU with
modified configuration (Page 317)
6 Transition to redundant system mode STEP 7, step 6: Transition to redundant
system mode (Page 318)
7 Modification of hardware STEP 7, step 7: Modification of hardware
(Page 319)
8 Editing and downloading organization blocks STEP 7, step 8: Editing and downloading
organization blocks (Page 320)
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