Reconfiguration Of A Module - Siemens SIMATIC S7-400H System Manual

14.9

Reconfiguration of a module

14.9.1 Reconfiguration of a module
Refer to the information text in the "Hardware Catalog" window to determine which modules
(signal modules and function modules) can be reconfigured during ongoing operation. The
specific reactions of individual modules are described in the respective technical documentation.
NOTICE
If you edit any protected parameters, the system will reject any attempt to changeover to
the CPU containing those modified parameters. The error event W#16#5966 is triggered
and written to the diagnostic buffer, and you will then have to restore the wrongly changed
parameters in the parameter configuration to their last valid values.
The selected new values must match the current and the planned user program.
Starting situation
The fault-tolerant system is operating in redundant mode.
Procedure
To edit the parameters of modules in a fault-tolerant system, perform the steps outlined
below. Details of each step are listed in a subsection.
Step
A
B
C
D
E
Note
After changing the hardware configuration, it is downloaded practically automatically. This
means that you no longer need to perform the steps described in sections Step B: Stopping
the standby CPU (Page 244) to Step E: Transition to redundant state (Page 247). 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".
S7-400H
System Manual, 09/2007, A5E00267695-03
What has to be done?
Editing parameters offline
Stopping the standby CPU
Downloading modified CPU parameters to the standby CPU
Switch to CPU with altered configuration
Change to redundant mode
System modifications in operation
14.9 Reconfiguration of a module
See section
Step A: Editing parameters
offline (Page 244)
Step B: Stopping the
standby CPU (Page 244)
Step C: Loading new
hardware configuration in
the standby CPU
(Page 245)
Step D: Switch to CPU
with modified configuration
(Page 245)
Step E: Transition to
redundant state
(Page 247)
243