How to Tune the LonNetwork adequate.

How to Tune the LonNetwork
This is for cases where the default timing policies for the LonNetwork aren’t
adequate.
Distech recommends that you use the BcpLonNetwork. There are features and
timings that are pre-configured by Distech.
When you “Discover” on a BcpLonNetwork, the device type and model are auto
recognized. The device Program ID, GFX Templates and LMNL files are
automatically assigned.
Installing a new BcpLonNetwork into your database
Lon Tuning - LonNetwork Poll Service
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Change the Local Lon Device Node ID --> 126
Change the Node ID to 126 and Commission the Local Lon Device.
Lon Tuning - LonNetwork Poll Service
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Discover devices on the BcpLonNetwork
• 1) click Discover
• 2) Commission the Device
Lon Tuning - LonNetwork Poll Service
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Default values on the BcpLonNetwork
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Lon Tuning - LonNetwork Poll Service
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Lon Tuning Policy
LonNetwork – view - property sheet
There may be multiple tuning policies depending on which LonNetwork
was originally installed.
You should use the Bcp Policy for Lon
Max Write Time;
0 Distech default
1 Tridium default
this is like a heartbeat – will push value every minute
Write on Start;
0 Distech default
1 Tridium default
When jace reboots – tries to update all points – floods the bus
Write on up;
0 Distech default
1 Tridium default
Write on Enable;
0 Distech default
1 Tridium default
Poll Service
Fast
1 sec
(default)
Normal
5 sec
(default)
ok to increase – try 30 sec
Slow
30 sec
(default)
ok to increase
Polling occurs when points are subscribed
Alarm Extensions poll points
History Extensions poll points
When you look at a page – those points are polled
Lon Tuning - LonNetwork Poll Service
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Busy Time
Busy Time for Lon
Want 70% or less
100% is flooded
BcpLonNetwork / View / Properties / Poll Service – Busy Time
Accurately determine busy time;
Close all program sheets and device property sheet
Lon Link Manager and confirm all points are bound
Open LonNetwork Property sheet
Expand Poll Service property
RC Poll Service property – Actions -> Reset Statistics
Wait 5 minutes for new data to be collected
You want Busy Time to be less than 70%
Adjust Normal Rate Poll Time as needed (30 sec is OK)
LonNetwork Lon Utility Manager
Local Lon Device
Reports
Network Summary
Transmit Errors No Clear
Doesn’t clear neuron chip after query
Use this to add multiple reports and
wait 5 minutes to re-run report
see the errors accumulate in number
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or
Reports
Network Summary
Transmit Errors
This will clear error register
IF YOU HAVE MORE THAN 10 ERRORS IN 5 MINUTES THEN THE LON BUS
MAY BE AFFECTED BY NOISE OR INSTALLATION ISSUES.
modify “Lon Comm Config”
Some Lon devices process slower than normal resulting in errors when you
commission or bind.
You can confirm such problems by using Lon Utilities Manager and run a VERIFY
Report (after binding). This will list binding inconsistencies.
Lon Comm Config parameters (suggested)
Repeat Timer
Mili Sec 96
(default)
Receive Timer
Mili Sec 384 (default)
Transmit Timer Mili Sec 512 (default)
change to mSec 128
change to mSec 1024
change to mSec 128
Retries = 4
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Spy the LonNetwork
Spy
HL the Station Fox icon
RC Spy
Log Setup
LonNetwork
Lon1
Trace X = will invoke trace
Then GoTo Application Director to view results
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