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N2000 BMS communication failure with MA5300

Publication Date:  2012-07-24 Views:  43 Downloads:  0
Issue Description
DEVICE: N2000 BMS
Software version: iManager N2000 BMS V200R010C02B012CP0015
The BMS Server reports "Communication with the device failed" alarm for all MA5300 devices from customer network (around 200) within few minutes interval - 10 to 15 minutes.
Alarm Information
Communication with the device failed
Handling Process
After some tests, the customer discovered that this problem was caused by a SNMP tool developed and used by customer in the network that was occupying MA5300 resources. 
When the tool was running, the MA5300 SNMP process was occupied and stopped to answer to BMS SNMP requests, causing the "Communication with the device failed" alarm. 
The SNMP tool was changed and the problem was solved.
Root Cause
If we ping the MA5300 devices we don't have timeouts. Additionaly for all other devices - MA5600 and AMG5000 we don't have this problem.
Suggestions

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