Communication
11.3 Communication via PROFINET IO
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
825
User data integrity is verified in both transfer directions (IO controller <––> IO device) by a
sign-of-life (4-bit counter).
The sign-of-life counters are incremented from 1 to 15 and then start again at 1.
● IO controller sign-of-life
– STW2.12 ... STW2.15 are used as the IO controller sign-of-life.
– The IO controller sign-of-life counter is incremented in each IO controller application
cycle (T
CACF
).
– The number of sign-of-life errors tolerated can be set via p0925.
– p0925 = 65535 deactivates sign-of-life monitoring on the IO device.
– Monitoring
The IO controller sign-of-life is monitored on the IO device and any sign-of-life errors
are evaluated accordingly.
The maximum number of tolerated IO controller sign-of-life errors in succession can
be set via p0925.
If the number of tolerated sign-of-life errors set in p0925 is exceeded, the response is
as follows:
1. A fault (F01912) is output.
2. The value "0" is output as the IO device sign-of-life.
3. A new synchronization (at least 15 received correct signs-of-life in succession) with
the IO controller sign-of-life is started.
One sign-of-life error can be reset with ten correct signs-of-life in succession.
● IO device sign-of-life
– ZSW2.12 ... ZSW2.15 are used as the IO device sign-of-life.
– The IO device sign-of-life counter is incremented in each DC cycle (T
DC
).
– Monitoring of the IO device sign-of-life can be implemented in the controller
application.
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