User Guide

20 LonWorks Interface Honeywell
6.2 Input Network Variables
Function Variable Name SNVT type Min.
Value
Max.
Value
Node Object request nviRequest SNVT_obj_request
Driver speed
setpoint
nviDrvSpeedStpt SNVT_switch n/a n/a
Driver set point
speed scaling
nviDrvSpeedScale SNVT_lev_percent -
163.84
0%
163.830%
Reset fault nviRstFault SNVT_switch n/a n/a
Clear kWh trip or
Drive total running
hours trip counters
nviClrCntr SNVT_switch 1 2
Process In Data nviProcessIn1..8 SNVT_lev_percent 0 65535
Digital Inputs nviDigitalIn1..8 SNVT_switch 0 4
Parameter Set nviParCmd SNVT_preset n/a n/a
Table 5. Network input variables
nviRequest
This input network variable provides the mechanism to request a particular mode for the
Node object or the Variable Speed Motor Drive object within a node. Supported requests are
RQ_NORMAL, RQ_UPDATE_STATUS, RQ_CLEAR_STATUS, RQ_REPORT_MASK,
RQ_DISABLED, RQ_ENABLE and RQ_CLEAR_ALARM.
nviDrvSpeedStpt
This input network variable provides control and a low resolution speed setpoint
state value command
0 NA Stop
1 0 0%
1 1 to 200 0.5 to 100%
1 201 to 255 100.0%
0xFF NA Auto
Table 6.
nviDrvSpeedScale
This input netork variable provides scaling for nviDrvSpeedStpt. Negative values indicate a
motor direction in reverse. For example, if the nviDrvSpeedStpt value is 50% and
nviDrvSpeedScale -150%, then the actual speed setpoint is –75%, or 0.75 times the nominal
speed in reverse direction. The valid range is –163,840% to 163,830. The value 0x7FFF
(+163,835%) will be handled as an invalid value. Default value is determined by
nciDrvSpeedScale. This value will be adopted at power-up and in case of not receiving an
update within the specified Receive Heartbeat time.