Y-LINK redundancy - Solutions - Huaqiang Electronic Network

Q: Using the 400H redundant system, the IM153-1 is attached to the PROFIBUS bus behind the Y-type connector, and the 300 module is used for PROFIBUS communication. Is this feasible? How to operate?

Question added: I want to ask by the way, then in the hardware configuration is direct point-to-point communication, or image, that is, if I do this according to this scheme, in the 400H system, the input and output are guaranteed to be within 244 bytes. use. But which device should I choose in the hardware configuration? A: The biggest role of Y-Link is to convert the redundant profibusDP under 400H into a single DP link.
To connect devices that are not redundant with the DP link.

In addition to the bottom plate, Y-Link is roughly divided into three parts. . . Is the 3 part of the Y word, ^_^
2 DPSlave. . . The IM153-2. is suspended by two mutually redundant DP links of 400h.
1 DPMaster. . . IM157. To hang other slave devices of single DP.

Y-Link register byte limit.
Y-Link is a standard DP slave from the 400h point of view.
Therefore, the number of register bytes must match the limit of 244 bytes into / 244 bytes.
This means that the device you are hanging behind the Y-Link, whether it is the S7-300, the inverter, or another DPIO station,
The number of its sites, the total number of register variables, should be accounted for well, not too much, resulting in overruns.

Y-Link application.
Y-Link application is Y-Link function, which can only be used to convert double Dp to Dp under 400h.
It is not possible to put a single DP dedicated redundant dual DP under the S7-300.
That is to say, Y-Link is "Y"-Link, can't be "person"-Link, but use it backwards.
At the same time, it is important to note that Y-Link can only be used at 400.
Therefore, it is feasible to connect the IM153-1 and 300 modules behind the Y-LINK.