Toshiba Tosvert VF-AS1 - Manual (Page 175)

E6581301
F-63
6
6.34 Override
H : Override addition input selection
H : Override multiplication input selection
• Function
These parameters are used to adjust reference frequencies by means of external input.
Title Function Adjustment range Default setting
H
Override addition input selection
[Hz]
 :Disabled
 :VI/II (voltage/current input)
 :RR/S4 (potentiometer/voltage input)
 :RX (voltage input)
 :Operation panel input enabled (including
LED/LCD option input)
 :2-wire RS485 input enabled
 :4-wire RS485 input enabled
 :Communication option input enabled
 :Optionl AI1 (differential current input)
 :Optionl AI2 (voltage/current input)
 :Up/Down frequency
 :Optionl RP pulse input
 :Optionl high-speed pulse input
 :Optionl binary/BCD input

H
Override multiplication input
selection
[%]
 :Disabled
 :VI/II (voltage/current input)
 :RR/S4 (potentiometer/voltage input)
 :RX (voltage input)
 :H
 :Optionl AI1

The override functions calculate output frequency by the following expression:
Frequency command value × (1+ )+Value [Hz] selected with H
1) Additive override
In th1is mode, an externally input override frequency is added to operation frequency command.
[Ex.1: RR/S4 (Reference frequency), VI/II (Override input)] [Ex.2:RX (Reference frequency), VI/II (Override input)]
Output frequency Over-ridden frequency
Override
(VI/II input)
0
10V
Over-ridden frequency
HJ
Override
(VI/II input)
0
10V
HJ
RR/S4 input
(Reference
frequency) ( ) RX input
(Reference
frequency)
( )
Output frequency
Reverse run
Forward run
Value [%] selected with H
100