Rockwell Automation 20-COMM-L LonWorks Adapter - Manual (Page 50)

4-18 Configuring the LonWorks Network
20-COMM-L LonWorks Adapter User Manual
Publication 20COMM-UM008B-EN-P
Conditions Required for
Operation
This section describes what conditions are required for performing some
common actions and how the combination of SNVTs and SCPTs affects the
operation of the drive.
Starting the Drive
The drive will RUN if nviDrvSpeedStpt.state is TRUE.
Stopping the Drive
The drive stops using the default stop mode if NviSpeedStpt.state is set to
‘0’ or if the node is brought offline or disabled, depending on the setting of
adapter Parameter 8 - [Idle Flt Action].
Adjusting the Frequency Setting
The actual value written to the drive equals:
nciNmlFreq * (nviDrvSpeedStpt / 100) * (nviDrvSpeedScale / 100)
Explanation:
Nominal frequency is the base for scale and setpoint percent values. See
Network Variable Inputs (NVIs) on page 4-5 for information about
nviSpeedStpt and nviSpeedScale.
Resetting Faults
If an error occurs, the drive faults. After removing the cause of the fault and
setting nviObjRequest to RQ_CLEAR_ALARM, the drive can be reset.
nciMinOutTm versus nciSendHrtBt
The nciMinOutTm has priority over nciSendHrtBt. This means that
heartbeats are not sent as often as specified in nciSendHrtBt if
nciMinOutTm has a longer time set.
nviSpeedScale nviSpeed Stpt.value nviSpeed Stpt.state Resulting Speed
0% 0% 1 0 Hz (RUN)
100% 0% 1 0 Hz (RUN)
0% 100% 1 0 Hz (RUN)
150% 100% 0 (Normal) Stop
150% 100% 1 1.5 * 1.0 * nciNmlFreq (RUN)
-75% 100% 1 -0.75 * 1.00 * nciNmlFreq (RUN)
150% 50% 1 1.5 * 0.50 * nciNmlFreq (RUN)