Firmware update for CPU S7-400H
Note
In a fault-tolerant PCS 7 system, the (S7-400H) CPUs must always have a uniform hardware
version and the same firmware version.
Update capability of CPUs
The online update of the firmware can be performed using the procedure described below as
of the following firmware versions:
● CPU S7-400H as of firmware version 4.5
As of firmware version 4.5, the firmware can be updated in RUN mode.
● CPU S7-400 as of firmware version 5.0
You always need a memory card for a firmware update for older CPUs.
Components
Update CPU S7-400
Update CPU S7-400H
PC with external EPROM burner or programming
device for programming the memory card
X
X
Memory Card Flash-EPROM; 8 MB
X
X
STEP 7
X
X
Files for the firmware update (available in the In‐
ternet).
X
X
3.3.3.1
How to perform a firmware update for the CPU (as of V5.0)
You are provided with several files (*.UPD) with the latest firmware to update the firmware of
a CPU. Download these files to the CPU. You do not need a memory card for the online update.
However, it is still possible to perform a firmware update with a memory card.
Preparation
Compare the type and manufacture date of the modules you are using with the information in
the document
PCS 7 Released Modules.
If replacement of the CPU is required, contact your Siemens representative.
Ensuring Availability
3.3 Hardware update
Service Support and Diagnostics (V8.2)
36
Service Manual, 03/2016, A5E36200111-AA