Daikin D-BACS, Design Manual

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248 12.5 LON Communication Specifications
Interface for use in LONWORKS
®
(3) Send on Delta Temperature: Detect Minimum Temperature Change
The bound output network variables will be sent to notify the system when there is a change in temperature that is
greater than the above specified value between two consecutive transmissions.
(4) Delay Start Up: Transmission Start Delay Time after Start Up
The time lag between turning on the LON node and starting the LON communications. This setting is useful for
avoiding communication congestion when LON nodes on the network simultaneously start up.
(5) Range Maximum: Maximum Transmission Limit
The number of messages transmitted from the Interface for LONWORKS
®
will effectively controlled by the bound
output network variables. It also specifies the number of messages to be sent per minute. This is used to limit the
number of messages to be consecutively sent from the nodes when they are started up.
- Items to be transmitted are the following 6 items: On/Off Status, Room Temperature, Filter Sign, Error Status,
Error Code and A/C Communication Status.
- The Interface for LONWORKS
®
collects room temperature data every 12 seconds, so any heartbeat transmission set
at a lower time interval will ultimately result in a 12-second transmission interval.
Control items Values and meanings
Minimum Transmission Interval sec.
0 seconds and 1.0 - 1200.0 seconds
0: No control, Default Value: 0
Heartbeat Transmission sec.
0 seconds and 10.0 - 1200.0
0: No control, Default Value: 0
Detect Minimum Temperature
Change
°
C Temp. (
°
C): 0.10-10.00, Default Value: 0.10
Transmission Start Delay Time after
Start Up
sec. 60.0-1200.0, Default Value: 60.0
Maximum Transmission Limit
(messages/sec.)
-- 0 and 1-6000, 0: No control, Default Value: 0