Siemens SIMATIC PCS 7 - Connecting PROFIBUS PA to PROFIBUS DP

Configuration
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Functionality
The Y-Link creates a gateway from the redundant DP master system of an S7-400H to a non-
redundant DP master system. This enables devices with only one PROFIBUS DP interface to
be connected to a redundant DP master system as switched I/O.
DPV1 slaves can be connected downstream from the Y-Link in addition to the standard
PROFIBUS DP slaves.
Y-Link with integrated repeater can forward diagnostic requests from the corresponding
function modules or input/output modules to the CPU.
Additional information
● Section "How to configure the Y Link (Page 145)"
● Operating Instructions DP/PA coupler, Active Field Distributor, DP/PA Link and Y Link
● Product overview Process Control System PCS 7; Released Modules
4.3.5.4 Connecting PROFIBUS PA to PROFIBUS DP
Bus links are gateways between bus systems and enable the communication connection of
the bus systems.
PA Link
The PA Link allows a connection between PROFIBUS DP and PROFIBUS PA. PA Link
includes the following modules, which are interconnected via the backplane bus:
● Interface module IM 153-2
● one or more FDC 157 DP/PA couplers
High availability solutions in PCS 7
4.3 Solutions for communication
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA 81