9.2 Software, F-CPU, F-I/O
Replacement of software components
When replacing software components on your PG/PC, e.g. when installing a new version of
STEP 7, you must carefully observe the notes regarding upward and downward compatibility
in the documentation and in the readme files provided with these products.
Replacement of hardware components
Hardware components for SIMATIC Safety (F-CPU, F-I/O, batteries, etc.) are replaced in the
same way as in standard automation systems.
Removing and inserting F-I/O during operation
It is possible to remove and insert F-I/O during operation, as with standard F-I/O. However, be
aware that replacing an F-I/O module during operation can cause a communication error in the
F-CPU.
You must acknowledge communication errors in your safety program at variables ACK_REI of
the F-I/O DB - or alternatively, using instruction "ACK_GL". Without an acknowledgment, the F-
I/O will remain passivated.
CPU firmware update
Check of the CPU operating system for F-approval: When using a new CPU operating system
(firmware update), you must check to see if the CPU operating system you are using is
approved for use in an F-system.
The minimum CPU operating system versions with guaranteed F-capability are specified in the
appendix of the Certificate. This information and any notes on the new CPU operating system
must be taken into account.
Firmware update for interface module
When using a new operating system for an interface module, e.g. IM 151‑1 HIGH FEATURE
ET 200S (firmware update), you must observe the following:
When updating the firmware (see help for STEP 7 "Online & Diagnostics"), if you selected
option "Activate firmware after update", then after the firmware has been successfully loaded,
the IM is automatically reset, and then runs with the new operating system. Note that the
firmware update for interface modules during operation generates a communication error in the
F-CPU.
You must acknowledge communication errors in your safety program at variables ACK_REI of
the F-I/O DBs - or alternatively, using instruction "ACK_GL". Without an acknowledgment, the
F-I/O will remain passivated.
Component replacement (software/hardware)
9.2 Software, F-CPU, F-I/O
Safety Integrated (with SINAMICS S120)
344 Commissioning Manual, 02/2020, A5E46305916B AB
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