Rockwell Automation 22-COMM-L LonWorks Adapter - Manual (Page 34)

4-6 Configuring the Network
Variable: nviDrvSpeedStpt
Format: SNVT_switch
Explanation: This Network Variable Input provides a low-resolution
speed setpoint. The setpoint value consists of two elements: the
requested speed and the drive state. When the drive state element of the
nviDrvSpeedStpt variable is set to zero, the drive will stop.
Valid Range: 0.0 - 100.0 (in 0.5% increments) followed by a space and
either a “0” (STOP), “1” (RUN), or “-1” (AUTO) drive state.
Scaling: See table above and Adjusting the Frequency Setting on
page 4-19 .
Default Value: -1 (state = AUTO). This value is adapted at power up.
This Network Variable Input may use Parameter 12 - [RcvHrtBeat
Time] if this function is set up for use.
Variable: nviDrvSpeedScale
Format: SNVT_lev_percent
Explanation: This Network Variable Input provides scaling for
nviDrvSpdStpt. For example, if nviDrvSpeedStpt value is 100.0% and
nviDrvSpeedScale value is -150.000%, then actual speed setpoint value
is -150.000% (reverse direction at 1.5 times nominal speed).
Valid Range: -163.840 to +163.830%
Scaling: See Drive Speed Setpoint on page 4-6 and Adjusting the
Frequency Setting on page 4-19 .
Default Value: Defined by nciDrvSpeedScale.
Drive Speed Setpoint
nviDrvSpeedStpt Value
nviSpeedScale
Value (%)
Resulting Speed Requested Speed (%) Drive State
n/a 0 (STOP) n/a STOPPED
0.0 1 (RUN) n/a RUNNING at 0%
0.5-99.5 1 (RUN) Effect speed and
running direction Equals nviDrvSpeedStpt
Value times
nviDrvSpeedScale Value
n/a -1 (AUTO) n/a AUTO (Invalid)
Speed Setpoint Scaling