3.6.1 Grouping PLC variables for inputs and outputs of F-I/O in structures (S7-1500)
You group PLC tags for inputs and outputs of F-I/O in structures (structured PLC tag) as you
would for inputs and outputs of standard I/O.
Use F-conform PLC data types (UDT).
Rules
When creating structured PLC tags for inputs and outputs of F-I/O, you must also observe the
following rules in addition to the rules in the standard:
● You must not group inputs/outputs of standard I/O and F-I/O at the same time in a structured
PLC tag.
● You may only group inputs/outputs of actually existing channels (channel value and value
status) in a structured PLC tag.
See also Access to Safety Integrated drives and F-I/O (Page 84)
● You may only group inputs/outputs of channels (channel value and value status) that are
enabled in the hardware configuration in a structured PLC tag.
See also Access to Safety Integrated drives and F-I/O (Page 84)
● In a structured PLC variable, you may only group inputs of channels (channel value and
value status) that when "1oo2 (2v2) evaluation of the encoder" is set, provide the result of
the "1oo2 (2v2) evaluation of the encoder".
See also Access to Safety Integrated drives and F-I/O (Page 84)
● In a structured PLC tag for an F-I/O with outputs, you must either group all outputs of this F-
I/O or an output range with multiples of 16 bits.
The F-CPU can go to STOP mode if this is disregarded. The cause of the diagnostics event
is entered in the diagnostics buffer of the F-CPU.
● A structured PLC tag that groups outputs of an F-I/O must not overlap with other PLC tags.
The F-CPU can go to STOP mode if this is disregarded. The cause of the diagnostics event
is entered in the diagnostics buffer of the F-CPU.
Note
To observe these rules, you must declare the F-conform PLC data type that is used for the
structured PLC tag accordingly.
You can identify which addresses can be occupied by a structured PLC variable from tab "I/O
variables" in the configuration of an F-I/O.
Safety program of the F-PLC
3.6 F-conform PLC data types (UDT)
Safety Integrated (with SINAMICS S120)
70 Commissioning Manual, 02/2020, A5E46305916B AB
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