Instruction manual

50
NETWORK VARIABLES
6.4.3 Speed monitor (0.005% increments) (network output SNVT_lev_percent
nvoDrvSpeed)
You can set the frequency command in 0.005% increments on the assumption that the frequency set in
"reference frequency setting (nciNmiFreq)" (Refer to page 101) is 100%.
⋅ A positive value indicates the motor is in the forward rotation status and a negative value indicates that
the motor is in the reverse rotation status.
⋅ Data send event ......................When data changes in 0.005% increments
⋅ Data send timing ..................... As set in Pr. 388 Send time interval at heart beat and Pr. 389 Minimum sending
time at heart beat. (Refer to page 87)
Output frequency is as shown in the following formula.
* Refer to page 101 for reference frequency setting and page 48 for simple speed setting.
For example, when "reference frequency setting(nciNmIFreq)" = 60.0Hz, "speed setting
monitor(nvoDrvSpeed)" = -150%, and "simple speed setting(nviDrvSpeedStpt.value)" = 50%, output
frequency is (60.0Hz × (-150%) × 50%) = -45Hz.
Therefore, a reverse rotation of 45Hz is given.
Data Name Initial Value Range Increments
nvoDrvSpeed 0.000% -163.840% to 163.830% 0.005%/bit
Output frequency = | (reference frequency setting × speed monitor × simple speed setting) *|
REMARKS
• Monitoring is disabled at less than the minimum frequency resolution (0.01Hz) of the inverter.