Tool/software:
Hello：
The customer uses DP83826 instead of KSZ8041 for servo drive EtherCAT bus. If more than 3 servo drives are enabled simultaneously, it will cause serious packet loss on the CAT bus.
It is basically determined that the interference source is the PE of the power cable, which interferes with the PHY analog end in common mode. When the PE of the power cable is not connected to the driver, packet loss is significantly reduced
By using jumper method, replace DP83826 of the same device with KSZ8041 and complete the peripheral circuit. KSZ8041 has no packet loss phenomenon.
1. The schematic diagram of DP83826 is shown below. Is there any way to improve this phenomenon?
2. It is understood that the 83826 analog terminal is voltage driven, while the 8041 is current driven. Is there a difference in its own anti-interference ability?
8041 PCB is show below
The monitoring upper computer is Omron NJ501-1300
