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Chosen
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| Joined: | Monday Aug 7th, 2006 |
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| Posts: | 16 |
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Posted: Wednesday May 7th, 2008 07:03 pm |
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Hi there, I have a comfort 1 system that has been having a complete system-wide communications failure every now and then (about once or twice a day for between 5 minutes and an hour). The coms failure seems to mostly occur during winter. Although, it does not seem to make a difference wether it is raining or not. I have been trying to solve this problem for about 2 years now.
The system has 1 comfort 1 board and 2 slaves, each with their own lem.
There is no ucm attached to the main board, but there is 1 c-bus ucm attached to slave 1 and 1 web ucm attacthed to slave 2.
There are 3 keypads.
There are a variety of programing 'tricks' that have been used in the system, like using a cbus switch to control a comfort output by monitoring the cbus group address with a comfort timer and things like that.
When a comunications failure occurs, the event log states that every ucm, slave and keypad is having a coms failure.
The current configuration has all alarm wiring coming back to a krone blocks panel. From there, they are linked together into the different zones (on the krone blocks) and just the zones are taken to the comfort panels. Each panel is in its own case, with its ucm and lem with the exception of the web ucm, it is in its own plastic box.
Each board is powered by its own 16v 40va transformer and each board has its own 12v 7ah battery. The only thing that is being powered off of the comfort boards 12v output at the moment, are the three keypads and they are powered off the master boards 12v. All passives, beams, ect. are being powered off a seperate power supply, independent of comfort.
One of things we have tried, is to run a 'grounding' wire between the commons of the master and slave boards, this did not help. We have tried disconnecting all outside alarm wiring and all ucms, this has not helped.
The comfort cases are mounted up against a 19" rack with bolts and nuts. All equipment, wiring is contained within this rack. The power points inside the rack appear to be clean (230v and no voltage between negative and earth). The rack is inside the garage and is being powered by a large 20Kva ups
Please, I would appreciate any assistance with this problem.
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admin
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| Joined: | Saturday Mar 3rd, 2007 |
| Location: | Singapore |
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Posted: Thursday May 8th, 2008 12:39 am |
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This could be due to one of the RS485 drivers on one of the modules locking up intermittently and pulling down the whole bus. We have had occasions where one of the Slaves had this problem
Can you isolate the Slaves one by one by disconnecting the KA/KB wires from it for a day, or long enough to confirm that that slave is causing the problem?
What is the firmware on the Comfort and both Slaves?
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Chosen
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| Joined: | Monday Aug 7th, 2006 |
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Posted: Wednesday May 14th, 2008 04:53 am |
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I have sent you an email with those details, but have not yet recieved a response, return address is ajcimage@gmail.com
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admin
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| Joined: | Saturday Mar 3rd, 2007 |
| Location: | Singapore |
| Posts: | 376 |
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Posted: Wednesday May 14th, 2008 08:13 am |
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I did not receive any email could you resend please to support@cytech.biz
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Current time is 03:05 am | |
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