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Hi,
We have two MS5001 turbines on our site (GT-601 & GT-602) having Mark-V turbine control system and EX2000 installed. They share a common HMI and have 1 local HMI each. The local HMIs are in the field whereas common HMI is in the control room. Communication with common HMI is established using ModHub coaxial to optical fiber media converters because of the distance. We have been facing communication issues recently which made the excitation system of GT-602 switch to manual mode twice.
This issue was faced 2.5 yrs ago as well and after extensive troubleshooting the ModHub card was found to be faulty. Because of the common HMI and interconnected network, the fault in one turbine affects the communication on the other as well. This being an intermittent fault we always isolate parts of the system, keep them under observation for a while and then narrow down the possible issues with wire, Tees, communication card, end termination resistor, ModHub card, cable's end connectors, optical fibers etc. The whole process takes quite long. Please also note that the HMIs values disappearance has occurred more times than the Ex2000 switchover from auto to manual
I have two questions regarding the case:
1. I've observed that both times this issue occurred, one of the turbines was shutdown. Can there be an actual communication overloading issue because of increased error counts and alarms as happens with some of the DCS?
2. Can you recommend some ARCnet analyzer module for easier faulty node identification? Someone recommended SH ARCALYZER for the case but I haven't received any history of any company ever using it with Mark-V. I need one through which I can monitor all ARCnet nodes including the Ex-2000 nodes.
Do let me know if any further information is required for the case.
We have two MS5001 turbines on our site (GT-601 & GT-602) having Mark-V turbine control system and EX2000 installed. They share a common HMI and have 1 local HMI each. The local HMIs are in the field whereas common HMI is in the control room. Communication with common HMI is established using ModHub coaxial to optical fiber media converters because of the distance. We have been facing communication issues recently which made the excitation system of GT-602 switch to manual mode twice.
This issue was faced 2.5 yrs ago as well and after extensive troubleshooting the ModHub card was found to be faulty. Because of the common HMI and interconnected network, the fault in one turbine affects the communication on the other as well. This being an intermittent fault we always isolate parts of the system, keep them under observation for a while and then narrow down the possible issues with wire, Tees, communication card, end termination resistor, ModHub card, cable's end connectors, optical fibers etc. The whole process takes quite long. Please also note that the HMIs values disappearance has occurred more times than the Ex2000 switchover from auto to manual
I have two questions regarding the case:
1. I've observed that both times this issue occurred, one of the turbines was shutdown. Can there be an actual communication overloading issue because of increased error counts and alarms as happens with some of the DCS?
2. Can you recommend some ARCnet analyzer module for easier faulty node identification? Someone recommended SH ARCALYZER for the case but I haven't received any history of any company ever using it with Mark-V. I need one through which I can monitor all ARCnet nodes including the Ex-2000 nodes.
Do let me know if any further information is required for the case.