23
Network
Configuration
Properties
(Nci)
The TR1 Series VFD LonWorks option card
supports LonMark network design to improve
interoperability.
The configuration parameters are network
variable inputs to the drive. Configuration of
parameters needs setting only one time, usually
at installation. See the table below for
definitions.
Function SNVT Type Variable Name Units Parameter
Nom. motor
frequency
SNVT_freq_hz nciNmlFreq 1 Hz 104
Nom. motor rpm SNVT_rpm nciNmlSpeed 1 rpm 106
Min. frequency SNVT_lev_percent nciMinSpeed 0.005% 201
Max. frequency SNVT_lev_percent nciMaxSpeed 0.005% 202
Ramp up time SNVT_time_sec nciRampUpTime 1 sec 207
Ramp down time SNVT_time_sec nciRampDownTime 1 sec 208
Heart beat time SNVT_time_sec nciSndHrtBt 0.1 sec ---
Data written to configuration
parameters is stored in non-
volatile memory. Continuous
writing may impair non-volatile
memory.
Functions listed in the table are part of the LonMark Functional Profile for Variable Speed Drive 6010 starting with
version 1.1
Network Configuration Definitions
Network
Drive
Control
Input
The most common functions for controlling the
TR1 Series Variable Frequency Drive from the
LonWorks network are made readily available.
Those functions and their descriptions are
presented in the table below. The control word
function accesses additional drive capabilities
for network control. The installer must verify
that parameter 500, Protocol, is set for FC
protocol.
Network Variable Inputs to TR1 Series VFD
* Reset on a transition from 0 to 1. A “0” must be sent after reset to enable the next reset.
Function SNVT Type Variable Name Units Parameter
Start/Stop SNVT_lev_disc nviStartStop Boolean 104
*Reset fault SNVT_lev_disc nviResetFault Boolean ---
Reference 1 SNVT_lev_percent nviRefPcnt 0.005% ---
Reference 3 SNVT_freq_hz nviRefHz 0.1 Hz ---
Control word SNVT_state nviControlWord 16 Boolean ---
**Drive speed
setpoint
SNVT_switch nviDrvSpeedStpt (see below) Ctrw + Ref.
Setpoint 1 SNVT_lev_percent nviSetpoint1 0.01% 418
Setpoint 2 SNVT_lev_percent nviSetpoint2 0.01% 419
Bus feedback 1 SNVT_lev_percent nviFeedback1 0.01% 535
Bus feedback 2 SNVT_lev_percent nviFeedback1 0.01% 536
**Part of the LonMark Functional Profile for Variable Speed Drive 6010 starting with version 1.1
The choice of open loop or closed loop operation
of the drive is selected in parameter 100,
Configuration.
For open loop control, it is recommended to
set the following parameters:
201 = 0 Hz
202 = 60 Hz
203 = LINKED TO HAND/AUTO
204 = 0.0
205 = 60.0
Network variable nviDrvSpeedStpt is comprised of a stop/start command (state) and a separate speed command
(value). 0 is a stop command and 1 is a run command. Drive speed is a function of the reference signal between 0
and 100%.
