What issues should be considered for DCS switches? Please recommend!

Network impact? The control system is part of a local area network – how could there be any impact? Unless infected with a virus. Hesman’s switches are practically the best for industrial applications, but they are too expensive. Generally, Cisco is sufficient (Honeywell and Emerson are both part of Cisco), and MOXA is also a good option.

It’s truly a network-related issue; the tests conducted earlier were meant to determine whether a power outage in the SDH system had an impact on the FGS controller. A: The control system consists of two MOXA switches. SDH power is off; internal communication within the control system is normal, but communication with the external gateway is severed ； With SDH power supply, communication across the central control network was interrupted instantly; PCS communication was restored after a few seconds, while ESD and FGS communication was restored after 2 minutes. Checks revealed that communication for segment 16 was interrupted; the ESD and FGS controllers did not undergo failover, but the communication port for segment 16 was locked. The switch with 16 IP addresses for power cut and power restoration still has interrupted communication with the ESD and FGS controllers, which also have 16 IP addresses. When the switch with 17 IP addresses loses power, communication with ESD, FGS, servers, and operation stations is interrupted. Upon restoring power to the switch, it is found that there are errors in the main controllers of ESD and FGS, so the system switches to the backup controllers.

Moderator, Hesman and Cisco are both fine; could you give some recommendations? Thank you so much!

Cyberstorm? I encountered this issue before; it stopped happening after switching to a TSC switch

This post was last edited by 83LJH on 2016-3-29 at 17:12. It’s fine for me to switch to Cisco switches now, but these two switches are old; new ones are needed to ensure greater security.

Our DCS is also from ABB, it’s the 800F model; currently we use TSC, but the new systems use MOAX408 and 508 to form a ring network. The storm has been encountered before; at that time, ABB used dual network cards for redundancy, and when one of the cards failed, it quickly generated a large number of junk packets that blocked the entire switch. At this point, stopping a switch to break the ring network and then restarting it will automatically clear it, but the underlying risk still remains. (The storm mainly circulates continuously within the switch; breaking this cycle will resolve it.) Another time, the ring network wasn’t configured properly, which resulted in a congestion after 1 hour. Later, after checking the MOAX408 configuration and setting up the ring port and similar settings, the issue was resolved. Hertzman switches are also good; the Hertzman fiber transceivers we use have never had any problems. But no Hertzman switch was used.

We use Huawei’s fiber transceivers, but we have not used Hirschmann’s switches

Is the probability of a network storm occurring in a ring network very high? Honey uses Cisco tools to configure Layer 2 switches as well. ABB uses Hirschman’s methods; basically, no configuration is required for analysis. Could you explain that?

I use Siemens industrial switches here, with a fiber-optic redundant ring architecture; there have been no failures in over a decade

The DCS in our power plant uses domestic imitation brand switches from D-LINK, and they have been working without any problems for 10 years now – very stable:lol:lol:lol