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Diagnostics and maintenance
5.2 Maintenance
5.2.1
Update firmware
New firmware versions of the module
If a new firmware version is available for the communications module, you will find this on
the Internet pages of Siemens Industry Online Support:
Link: (https://support.industry.siemens.com/cs/ww/en/ps/15672/dl)
Firmware files have the file format *.upd. Save the file on your PC.
There are different ways of loading a new firmware file into the module:
• Online functions of STEP 7 via Ethernet
• Loading the firmware file into the CPU from an SD card
Note
SD card only for firmware file
For the firmware file, you need a SIMATIC SD memory card, for example (article numbers):
• 6AV6671-8XB10-0AX1
• 6AV2181-8XP00-0AX0
• 6AV2181-8AQ10-0AX0
The firmware update card may not contain any other files. An SD card with configuration
data cannot be used.
Scenarios
It is not possible to upgrade the CP with article number 6GK7542-5FX00-0XE0 to firmware
version V3.
Updating earlier versions:
• V2.x → V2.y
It is possible to upgrade from a version V2.x to a higher version V2.y.
• V1.x → V2.x
It is possible to upgrade from a version V1.x to a higher version V2.y.
• V2.x → V1.x
If you purchase a module with pre-installed firmware version V2.x but wish to operate it
with an older firmware V1.x, this is not directly possible.
In this case, contact Siemens Customer Support.
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Equipment Manual, 01/2023, C79000-G8976-C326-05
SIMATIC CP 1542-5
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