CHAPTER 5 LONWORKS COMMUNICATION FUNCTION
14
5.4 Configuration Properties - nci’s
If an nci has a corresponding parameter in the inverter it will be written to with the value of the nci at some
occations, apart from when nci is update from network. These occations are when:
-Node is brought online
-Inverter is power-cycled
-Inverter is tripped and error is reset from LonWorks option card
-If there is a communication error between neuron chip and option board host processor
This means that if setting e.g. F002 (Ramp up time) from the D.O. to e.g. 3 sec will be set to 3 sec until any of
these things happen. To ensure that these parameters have the values intended, set them from the option
board.
5.4.1 Send Heartbeat (SNVT_time_sec nciSndHrtBt)
This input configuration network variable provides the maximum send time for the variable
nvoDrvSpeed
.
Default value = 0 (disabled).
5.4.2 Receive Heartbeat (SNVT_time_sec nciRcvHrtBt)
This configuration property is used to control the maximum time that elapses between updates of the input
network variable
nviDrvSpeedStpt
. If timeout occurs, the module will trip the inverter by setting
OPT1(2)_TRIP_N low.
The valid range is any value between 0.0 sec and 6,553.4 sec. Setting nciRcvHrtBt=0 disables the Receive
Heartbeat mechanism. Default value is 0.
5.4.3 Minimum Send Time (SNVT_time_sec nciMinOutTm)
This input configuration network variable control the minimum period of time that expires before the
network
output variables
can be resent. This is good for limiting use of bandwidth on the LonWorks channel.
The valid range is any value between 0.0 to 6,553.4 secs. Setting nciMinOutTm = 0 disables transmission
limiting.
Default value = 0.
5.4.4 Location Label (SNVT_str_asc nciLocation)
This configuration property can optionally be used to provide more descriptive physical location information
than can be provided by the Neuron Chip’s 6-byte location string. The location relates to the object and not to
the node.
Default value = empty spaces.
5.4.5 Motor Nominal Speed (SNVT_rpm nciNmlSpeed)
This configuration property can be used for setting the base frequency (Range of setting: 30 to 400Hz or
equivalent frequency).
Base frequency(Hz)=the number of rotation(min
-1
)*the number of motor poles/120
Initial value is the value which is set at first base frequency: A003. If data is changed, it will be reflected to
A003.
Inverter parameter P049 is used for setting the number of motor poles.
