Siemens SINUMERIK 840D sl Configuration Manual page 125

Parameter
Start address
Length
Extension
Consistency
Process image
Interrupt OB number
Manual assignment of the F-Watchdog
time
(only PROFIsafe)
F-monitoring time
(only PROFIsafe)
Manual assignment of the F-I/O DB
number
(only PROFIsafe)
SINUMERIK STEP 7 Toolbox V15.1
Configuration Manual, 12/2018, A5E46279635B AA
6.6 Displaying or adapting the telegram configuration
Drive
Display of the process data word
(PZD)
Length of the telegram in bytes or words. The telegram length depends on the
telegram type used.
Display of the extension of the relevant telegram in words or setting, if supported by
the telegram type.
The use of various consistency areas is useful to optimize the performance of an
S7-CPU. Consistency areas that are longer than two words must be edited with
system functions. You can use the effective Load/Transfer commands for consis‐
tency areas up to two words.
Total length:
The consistency applies for all data of this slot. This default entry should usually be
sufficient.
Unit:
The consistency applies for one process data word.
You must configure at least a "2" word "Total length" for the transfer of a double
word.
Display of the process image (partition), which is used to consistently transfer the
data.
Specification of the interrupt OB number for the output of diagnostic information.
If this option is activated, you have the capability of assigning the F-monitoring time
manually. Otherwise the F-monitoring time will be assigned according to the global
parameterization at the interface (DP interface > F-parameters).
Monitoring time in the fail-safe DP standard slave/IO standard device/PA field de‐
vice.
A valid, current safety telegram must arrive from the F-CPU within the monitoring
time. This ensures that failures and errors are detected and the appropriate reac‐
tions triggered to keep the safety system in a safe state or to transfer it to a safe
state.
If this option is activated, you have the capability of assigning the F-I/O DB-number
manually. Otherwise it is assigned by the F system.
Configuring telegrams and drive units
Controller
Currently set start address for the configured
module. You can accept or change the ad‐
dress.
If you change the start address for an actual
value, the start address is also adapted for the
setpoint.
Only PROFIsafe: The start address is part of
the F-I/O DB-name of this telegram. If you
change the start address, the F-I/O DB-num‐
ber will also be changed.
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