11-04-2018 05:42 PM
After discussions with Monico, we adjusted the numbers of parameters that are held in the queue from 15 to 10. This seemed to make all the difference as the unit has run well past the previous 5hour mark.
10-08-2018 08:27 PM
One thing to remember on the ESS G3600, which uses only the Cat Data Link for communication, if you are polling all the parameters at fast intervals, that could overload the CDL since it has capacity limitations. You need rapid polling of parameters like oil pressure, speed, choke actuator, WG actuator, fuel actuator as these are critical to the engine operation. But parameters, like engine oil temp, eng jw temp, air inlet temp, exhaust temp, and items like this could be polled less frequently and still keep you appropriately updated with engine status. Cat has a booklet published which discusses the
CCM and polling parameters.
Good luck and I would like to know how you make out.
10-08-2018 08:18 PM
Thanks for the quick reply and info. We have gone down the path of replacing the CMS unit previously as we thought this could be an issue. It seems that this did not solve the issue like it did in your situation. We will run through the remainider of the possible causes
A few years back the CMM failed and was replaced with a MONICO CDL Gateway that interfaces back to our PLC system for diagnostics. As the CMS has been replaced with a new unit we would rule this out, the only other items that sit on the CAT Data Link # 2 network is the DMC, DDT Harness and our alternative CCM. As we do not have a DDT connected, this can be ruled out as nothing is connected to the plugs and the plugs appear to be clean, so would rule the DDT out as well. leaving the DMC and our alternate CCM.
We will disconnect our alternate CCM and see how long the engine will run for. As the need to run this engine has not been required until recently the changes made to the CCM have never been tested with the engine running for this length of time, but the module continuously polls for information 24x7. Not sure if running the engine increase the load on the processor that cause the unit to lock up? Not sure, but we will run our test and see what happens.
Regards and thanks for your responses.
10-08-2018 12:38 AM
I haven't looked through the Troubleshooting Manual yet but I remember an early G3606 where the CMS would lock up one of the two data links to the ECM. It would run at random intervals but about the same length that you have experienced. We noticed this because the engine had a CCM module on it and the CCM indiated a problem with the data link with a code. You might not be able to see this if you don't have a CCM module but monitoring the data link lights on the ECM might show you this. After trying several things, it appears that the CMS would reset and the engine would run again for an undetermined period of time. We had no way to check the CMS module but had a spare CMS module. After installing the spare CMS, the engine never shut down again. We never got an answer back from Cat what the problem was with the CMS.
This a quick reply for you to consider. If I see anything else, I will reply.
10-07-2018 11:54 PM
We have a CAT 3608 Engine driving a Gas Compressor. Serial Number: 4WF00146 that had issues with the ECM having losing all tuning paramters. The ECM was replaced, and a bit of work has been carried out by CAV to resolve mis-firing issues. CAV have also performed tuning and the engine is running alot better.
Our original issue has returned where after the engine is running for a period of 4 - 5 hours, the system shuts down. The only information our control system provides is that the hardwired fault from the ESS is active indicating the ESS shutdown. When it gets to this point it, we cannot reset remotely or locally via the selector switch. The only way to rset the unit is to remove power completely at the unit. We also notice that the local Display unit stops updating and coimmunications to the Control System via the CDL Gateway module also locks up. The local display unit on the unit has been replaced.
Any suggestions / ideas are appreciated.
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