Y-Link
- Transmission rates for the redundant master system:
9.6 Kbit/s to 12 Mbit/s. - Bumpless switchover of the redundant PROFIBUS DP master system's active channel.
- Supports system changes on a SIMATIC S7-400H during operation.
- Diagnostics using LEDs and the user program
Y-Coupler
- Transmission rates for the lower-level master system (independent of redundant DP master system):
187.5 Kbit/s to 12 Mbit/s. - Electrical isolation between lower-level DP master system and power supply via the coupler.
- Degree of protection IP20
Principle of operation
The Y-Link maps the lower-level DP master system on the redundant PROFIBUS DP master system as a switched PROFIBUS DP slave .
The Y-Coupler and the lower-level DP master system form an independent bus system and operate decoupled from the redundant bus system.
The Y-Link as a DP slave on the redundant DP master system acts as a proxy for the stations on the lower-level DP master system with regard to data.
Configuration
The Y-Link can be configured with STEP 7 as of Version 5.2. It is not necessary to configure the Y-Coupler.
When STEP 7 calculates the bus parameters, the stations connected on the lower-level DP master system as well as the Y-Link itself are taken into account.
Parameter assignment for the DP slaves
The redundant DP master system assigns the parameters for the DP slaves in the lower-level DP master system via the Y-Link.