Siemens SIMATIC ET 200AL, System Manual

Page: 1866 / 2255

PROFINET with the redundant S7-1500R/H system
6.7 Configuring PROFINET IO on a redundant S7-1500R/H system
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
301
PROFINET devices downstream of a switch
To connect additional PROFINET devices to the PROFINET ring, use a switch. For the
redundant S7-1500R system, ensure that a switch in the PROFINET ring supports
H-SYNC Forwarding in addition to MRP.
You connect the following devices to the PROFINET ring with a switch.
•
PROFINET devices with one port
• Non MRP-capable PROFINET devices
• PROFINET devices that do not support H-Sync Forwarding, such as standard IO devices.
The following figure shows a redundant S7-1500R system with connected PROFINET devices
downstream of a switch.
IO device 1
(S2)
IO device 1 is located in the PROFINET ring.
The IO device 1 supports system redundancy S2, MRP and H-Sync Forwarding.
Switch The switch is located in the PROFINET ring. The switch supports MRP and
H-SYNC Forwarding.
IO device 2 IO device 2 is connected to the PROFINET ring via the switch.
IO device 2 is a standard IO device that is connected to the redundant S7-1500R system
via the "Switched S1 device" function.
HMI device The HMI device is connected to the PROFINET ring via the switch.
Figure 6-5
PROFINET devices downstream of a switch