Instruction manual

48
NETWORK VARIABLES
6.4 Variable Speed Motor Drive Object
6.4.1 Start/stop and simple speed setting (network input SNVT_switch
nviDrvSpeedStpt)
You can set "start/stop" and "simple setting of set frequency".
⋅ Set start/stop in state.
The rotation direction (forward/reverse rotation) is determined by whether "speed adjustment
(nviDrvSpeedScale)" (Refer to page 49) is positive or negative.
⋅ Set simple speed setting in value.
As the set frequency, set its ratio to "speed adjustment (nviDrvSpeedScale)" (0.5% increments).
* Operation of nviDrvSpeedStpt differs according to nviInvSetFreq. (Refer to page 56)
nviDrvSpeedStpt Operation *
State Value
nviInvSetFreq = "H7FFF" nviInvSetFreq = "0Hz to 400Hz"
H0 NA Stop
H1
0
(initial value)
Run at a 0% frequency.
0.5 to
100%
Run at a 0.5 to 100% frequency.
(nciNmlFreq × nviDrvSpeedStpt × nviDrvSpeedScale)
Run at an nviInvSetFreq frequency.
H2 to HFF
(initial value:
HFF)
NA No operation
REMARKS
• The variable is initialized to "HFF" at power-on or if it is not updated at the "heartbeat receive time interval
(nciRcvHrtBt)" (Refer to page 97).
• The inverter operates at value = 100% frequency even if "the value exceeding 100%" is set when state = "H1".
• Updating nviDrvSpeedScale resets the start command depending on the state of nviDrvSpeedStpt.