Pilz PNOZ mm0p 24VDC - Manual (Page 124)

Safe Ethernet connection
Operating Manual PNOZmulti communication interfaces
1001154-EN-13
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Application guidelines
Connection status
The output on the
Safe Ethernet Connection Status element in the user program indi-
cates whether the data is received without error and whether there is a connection for re-
ceiving data (error-free data receipt).
If the output = "0", the connection is broken. All virtual inputs on the
Safe Ethernet Con-
nection are switched to "0". The base unit remains in a RUN condition.
When the PNOZmulti is restarted, communication is started with a falling edge on the ele-
ment's input.
The cause of the error can be evaluated via the expanded PVIS diagnostic configuration
(see section entitled
Diagnostic word [ 128] ).
A break in the connection for receiving data has no direct effect on the connection for send-
ing data.
Connection addresses
The connection authenticity of a point-to-point connection is tested using the connection ad-
dresses that are configured on the respective status - block/element as
Local Address and
Remote Address.
Make sure that the connection addresses in a point-to-point connection is only used on pre-
cisely this connection within a network.
ATTENTION!
Loss of safety function due to the use of a connection address for more than
one point-to-point connection in a network!
If a connection address is used in a network for more than one point-to-point
connection, an unintended connection to a communication partner may re-
sult. This cannot be detected. Make sure that the connection addresses in a
point-to-point connection is only used on precisely this connection within a
network. It is essential to use the
Check list for connection addresses.
Example 1: Connection addresses on a point-to-point connection with safe Ethernet
connection
} Two different connection addresses are needed per point-to-point connection. In the ex-
ample, connection addresses 20 and 21 are to be used.
} Other potential connections in the network may no longer use connection addresses 20
and 21.
7.7