Adding Components In Pcs 7 - Siemens SIMATIC S7-400H System Manual

System modifications in operation

14.3 Adding components in PCS 7

14.3 Adding components in PCS 7
Starting situation
You have verified that the CPU parameters, such as monitoring times, match the planned
new program. If they do not, adapt the CPU parameters first (see section Editing CPU
parameters (Page 234)).
The fault-tolerant system is operating in redundant mode.
Procedure
Carry out the steps listed below to add hardware components to a fault-tolerant system in
PCS 7. Details of each step are listed in a subsection.
Step
1
2
3
4
5
6
7
Exceptions
This procedure for system modification does not apply in the following cases:
● To use free channels on an existing module
● For more information on adding interface modules (see section Adding interface modules
204
What needs to be done?
Modification of hardware
Offline modification of the hardware configuration
Stopping the standby CPU
Loading new hardware configuration in the standby CPU
Switch to CPU with modified configuration
Transition to redundant state
Editing and downloading the user program
in PCS 7 (Page 210))
Note
As of STEP 7 V5.3 SP2, after changing the hardware configuration, the load operation
runs largely automatically. This means that you no longer need to perform the steps
described in sections PCS 7, Step 3: Stopping the standby CPU (Page 206) to PCS 7,
Step 6: Transition to redundant state (Page 208). The system behavior remains unchanged
as already described.
You will find more information in the HW Config online help, "Download to module ->
Download station configuration in RUN mode".
See section
PCS 7, step 1: Modification
of hardware (Page 205)
PCS 7, Step 2: Offline
modification of the hardware
configuration (Page 205)
PCS 7, Step 3: Stopping the
standby CPU (Page 206)
PCS 7, Step 4: Loading new
hardware configuration in the
standby CPU (Page 206)
PCS 7, Step 5: Switch to
CPU with modified
configuration (Page 207)
PCS 7, Step 6: Transition to
redundant state (Page 208)
PCS 7, Step 7: Editing and
downloading the user
program (Page 209)
System Manual, 09/2007, A5E00267695-03
S7-400H