Efficient Networks S120 manual User data integrity

Models: S120

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Communication PROFIBUS DP/PROFINET IO 10.2 Communication via PROFIBUS DP

Data

Time required [µs]

Per byte of user data

1,5

One additional class 2 master

500

User data integrity

User data integrity is verified in both transfer directions (master <––> slave) 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.

Master sign-of-life

STW2.12 ... STW2.15 are used for the master sign-of-life.

The master sign-of-life counter is incremented in each master application cycle (TMAPC).

The number of sign-of-life errors tolerated can be set via p0925.

p0925 = 65535 deactivates sign-of-life monitoring on the slave.

Monitoring

The master sign-of-life is monitored on the slave and any sign-of-life errors are evaluated accordingly.

The maximum number of tolerated master sign-of-life errors with no history can be set via p0925.

If the number of tolerated sign-of-life errors set in p0925 is exceeded, the response is as follows:

A corresponding message is output.

The value zero is output as the slave sign-of-life.

Synchronization with the master sign-of-life is started.

Slave sign-of-life

ZSW2.12 ... ZSW2.15 are used for the slave sign-of-life.

The slave sign-of-life counter is incremented in each DP cycle (TDP).

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Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Page 420
Image 420
Efficient Networks S120 manual User data integrity