Danfoss LonWorks Option Card, Instruction Manual

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33
MG.60.N1.22 - VLT is a registered Danfoss trademark
VLT
®
5000 / VLT
®
6000 HVAC / VLT
®
8000 AQUA
Min send time
Sets the minimum period between
transmissions for all output network variables,
using the network variable nciMinSendT. This
function is used to keep the transmission of
variables that change continuously from
dominating the network communication.
Max receive time
This drive function is replaced by the value
set in parameter 803,
Bus Time Out. The
LonWorks option will initiate bus time out
activities when the time set in parameter 803
expires without receiving an input network
variable directed to the drive. This acts like a
LonWorks receive heartbeat. The action taken
by the drive is determined by the setting
selected in parameter 804,
Bus time out
function . See the parameter description
section of this manual. The value of
nciMaxReceiveT has no effect on the
operation of the drive.
Network
Timer
Functions
Max send time
This function sets the maximum time between
transmissions for the network variables Drive
Output 1, 2, and 3 using the configuration
network variable nciMaxSendT. It can be used
by the controller to monitor the health of the
VLT and controller connection. It acts like a
LonWorks send heartbeat.
The Max send time function is disabled when
nciMaxSendT is not configured or set to “0.”
Function SNVT Variable Units Max Min Default
type Name
Min send SNVT nciMin- time 0 days 0 days 0 days
time _elapsed SendT 0 hours 0 hours 0 hours
_tm 1 min 0 min 0 min
5 sec 0 sec 0 sec
535 msec 100 msec
1
500 msec
30 msec
2
Max SNVT nciMax- time 0 days 0 days 0 days
receive _elapsed ReceiveT 18 hours 0 hours 0 hours
time _tm 12 min 0 min 0 min
15 sec 1 sec 0 sec
0 msec 0 msec 0 msec
(Off)
Max SNVT nciMax- time 0 days 0 days 0 days
send _elapsed SendT 0 hours 0 hours 0 hours
time _tm 1 min 0 min 0 min
5 sec 0 sec 0 sec
535 msec 100 msec
1
0 msec
30 msec 2 (Off)
1
78 kbps transformer coupled twisted pair and 78 Kbps free topology transceiver models.
2
1.25 Mbps transformer coupled twisted pair transceiver model.
Network Timer Functions