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6
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 -163.840% 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 6-1. 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 6-2.
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.
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