Pilz PNOZ mm0p 24VDC - Manual (Page 119)

Safe Ethernet connection
Operating Manual PNOZmulti communication interfaces
1001154-EN-13
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Safe Ethernet connection
Overview
The safe Ethernet connection enables a point-to-point connection between a PNOZmulti
base unit and a PSS 4000 device. Up to 48 safe virtual inputs and outputs can be transmit-
ted via this connection.
System requirements
} PNOZmulti Configurator: from Version 9.3.0
} All base units from the configurable control system PNOZmulti (PNOZ mxp) that have
an Ethernet interface, from V6.7.
Please contact Pilz if you have an older version.
Function description
The Safe Ethernet connection is used for safe communication between a PNOZmulti base
unit and a PSS 4000 device, based on Industrial Ethernet. The underlying protocol is Mod-
bus/TCP.
A point-to-point connection (1:1 communication relationship) can be implemented via the
safe Ethernet connection. Information can be exchanged between a PNOZmulti and a
PSS4000 via 48 safe virtual inputs and 48 safe virtual outputs.
Data exchange via the non-safety-related communication medium (Ethernet, Modbus/TCP)
achieves safety in two ways: by using safety-related blocks in both communication partners
and by the fact that the blocks are executed in the safety-related part of the control system.
This procedure corresponds to the black channel principle in accordance with EN/
IEC 61784-3. Depending on the application area and its respective regulations, the block
can be used in accordance with EN/IEC 61508 up to SIL3 and up to PLe (Cat.4) in accord-
ance with EN ISO 13849-1.
A safe Ethernet connection between a PNOZmulti and a PSS 4000 device can be regarded
as a connection that provides communication in both directions. The communication part-
ners continually try to send, even if the connection is broken. If the connection is error-free,
then it can be restored via a reset on the receiver side.
To establish a full connection in both communication directions, the connection must be re-
set on both sides.
Configuration in the PNOZmulti Configurator
The connection settings for the PNOZmulti are made in the PNOZmulti Configurator in the
Safe Ethernet Connection Status element. This is where the local address, remote ad-
dress and timeout are set. For details of the configuration please refer to the online help for
the PNOZmulti Configurator.
} Local address
Own connection address, must be different from the remote address.
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